JP4768587B2 - Seismic structure of buildings - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake resistant structure for a building, which ensures desired earthquake resistant strength, and has a simplified structure by dispensing with a buckling preventive member. <P>SOLUTION: According to the earthquake resistant structure, a pair of right and left vertical members 14, 13 are connected to an upper girder 11 and a lower girder 12, and a plurality of diagonals 17 are arranged between the vertical members 14, 13, as earthquake resistant elements, in a manner extending diagonally with respect to the vertical members 14, 13. Each diagonal 17 has a linear shape as a whole, and connection edges 17a on both ends are secured to the vertical members 14, 13, by welding or the like, and a portion of the diagonal 17, inner than the connection edge 17a is formed into a plastic hinge portion 17b, which means that each diagonal 17 has two plastic hinge portions 17b. Then intersection points of the two diagonals 17 intersecting each other like the X, are rigidly connected together by welding. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a seismic structure of a building.

As a seismic structure of a building, a structure in which a pair of vertical members are erected between upper and lower beams and a bracing is provided between the vertical members is known. Further, in such an earthquake resistant structure, in order to shorten the buckling length of the bracing and improve the bracing strength of the bracing, fixing the intermediate portion of the bracing to a stud or the like is performed (for example, see Patent Document 1). ). In addition, a technique has been proposed in which an energy absorbing portion is provided at a part of each brace, and vibration energy is absorbed by the energy absorbing portion.
Japanese Patent No. 3664611

  In the earthquake resistant structure in which the energy absorbing portion is provided in a part of the bracing as described above, when the bracing becomes long, out-of-plane buckling occurs before the energy absorbing portion absorbs energy when a compressive load is applied. Therefore, in the existing configuration, a buckling prevention member composed of a vertical beam and a horizontal beam is indispensable.

  The main object of the present invention is to provide a seismic structure for a building that can secure a desired seismic strength and can simplify the structure without using a buckling prevention member.

  Hereinafter, means and the like effective for solving the above-described problems will be described while showing functions and effects as necessary. In the following, in order to facilitate understanding, a corresponding configuration example in the embodiment of the invention is appropriately shown in parentheses, etc., but is not limited to the specific configuration shown in parentheses.

  In the earthquake-resistant structure of the building in the present invention, a pair of vertical members (vertical members 13, 14) are connected between the upper and lower beams (upper large beam 11, lower large beam 12) provided in the building, and between the vertical members, A seismic element (oblique member 17) having energy absorbing parts (plastic hinge parts 17b) for absorbing energy during vibration at both ends and in the vicinity of the connecting part with the longitudinal member is provided, and a plurality of seismic elements are provided. These seismic elements are connected to each other between the longitudinal members.

  According to the said structure, the energy at the time of a vibration is absorbed by the energy absorption part of the seismic element provided between the vertical members. In this case, since the seismic element has energy absorbing portions in the vicinity of the connecting portion with the vertical member at both ends, the load due to external force can be distributed and borne in the seismic element, improving the seismic performance. Can be planned. Further, by providing two energy absorbing portions per seismic element, it is possible to lower the earthquake resistance performance of each energy absorbing portion.

  In addition, since the plurality of seismic elements are connected to each other between the longitudinal members, inconveniences such as lateral buckling (out-of-plane buckling) occurring before energy absorption by the energy absorbing portion can be suppressed. That is, when an external force such as seismic force acts in a certain direction in the building, a compressive load acts on a part of the plurality of seismic elements, and a tensile load acts on other parts. In such a case, the buckling of the seismic element receiving the compressive load is constrained by connecting multiple seismic elements between the longitudinal members and the seismic element not receiving the compressive load (the part of the seismic element receiving the tensile load). Is done. Therefore, the buckling of the seismic element can be prevented without providing a buckling prevention member such as a vertical beam or a horizontal beam. As described above, it is possible to simplify the structure while ensuring the desired seismic strength and eliminating the need for a buckling prevention member.

  The seismic element is preferably made of a rigid material provided in an oblique direction with respect to the longitudinal member, and the energy absorbing part absorbs energy during vibration by bending deformation. In this case, energy during vibration is absorbed by bending deformation in the rigid material.

  The energy absorbing portion may be a plastic hinge portion in which a plastic hinge (yield hinge) is formed by yielding a cross section by a load.

  The plurality of seismic elements may be arranged in a substantially X shape having a symmetrical shape in front view between the pair of longitudinal members. Thereby, even if the earthquake force of which direction acts on each beam on the upper and lower sides in a building, the earthquake-proof effect can be exhibited with sufficient balance.

  A plurality of seismic elements and the seismic structure by the seismic elements are specifically configured as the following (a1) to (a3).

  (A1) The seismic elements (diagonal members 17, 21) are provided in a straight line so as to be bridged between the pair of longitudinal members, and are installed so that the plurality of seismic elements cross each other. Intersections are connected.

  (A2) The seismic element (seismic bar 31) has two inclined portions (inclined portions 31a) extending in different directions and is provided with both ends connected to the same vertical member at positions separated in the vertical direction. The top portions of the plurality of seismic elements connected to each longitudinal member are connected between the pair of longitudinal members.

  (A3) The seismic element (seismic bar 33) has two sides of inclined portions (inclined portions 33a) extending in different directions and is provided with both ends connected to the pair of vertical members at the same height position. The tops of the plurality of seismic elements are connected between the pair of longitudinal members. In (a2) and (a3), the seismic elements are generally mountain-shaped and trapezoidal.

  In any of the above (a1) to (a3), the buckling of the seismic element can be suitably prevented when an external force such as seismic force is applied. Moreover, in said (a1)-(a3), all become a structure by which a some earthquake-resistant element is arrange | positioned at substantially X shape. Therefore, as described above, even if the seismic force in any direction acts on the upper and lower beams in the building, the seismic effect can be exhibited with a good balance.

  It is preferable that an intermediate plate (intermediate plate 18) is provided at the connecting portion of the earthquake-resistant element, and the plurality of earthquake-resistant elements are connected to the intermediate plate by welding. That is, when the seismic element is composed of a rod-shaped steel material such as a round steel material or a square steel material, it is considered that the work of welding the seismic elements (steel materials) to each other becomes difficult. In this respect, welding is facilitated by welding each seismic element with an intermediate plate interposed. In addition, the quality of the welded portion is stabilized.

  The energy absorbing unit may be configured as shown in the following (b1) and (b2).

  (B1) In the seismic element (oblique member 17), a joint portion (joint end portion 17a) to be joined to the longitudinal member is provided along the axial direction of the longitudinal member, and is bent to a position away from the joint portion. A portion is formed and the bent portion is defined as the energy absorbing portion (plastic hinge portion 17b). In this case, a bending deformation region of the energy absorbing portion can be secured by forming the energy absorbing portion (bending portion) apart from the joint portion. Therefore, a good energy absorption effect can be realized in the energy absorption part.

  (B2) In the seismic element (diagonal member 21), a joint (joint end 21a) to be joined to the longitudinal member is provided along the axial direction of the longitudinal member, and the longitudinal member and the seismic element are provided. In addition, a spacer piece (spacer piece 22) is interposed between the longitudinal member and the joint portion, and a bent portion at an end portion of the joint portion is defined as the energy absorbing portion (plastic hinge portion 21b). In this case, the energy absorbing portion is provided in a state of being floated from the vertical member by the spacer piece, so that a bending deformation region of the energy absorbing portion can be secured (interference with the vertical member during bending deformation is suppressed). Therefore, a good energy absorption effect can be realized in the energy absorption part.

  When the above (b1) and (b2) are compared, the configuration of (b1) does not require a spacer piece. Therefore, it is considered that the configuration (b1) is advantageous in simplifying the configuration.

  Between the pair of longitudinal members, a plurality of structures formed by connecting a plurality of seismic elements to each other may be arranged in the vertical direction. Thereby, the seismic effect on the same plane which consists of each beam up and down and a pair of vertical member can be improved greatly.

  The technical ideas that can be extracted in addition to the above within the disclosure scope of the present specification are described below.

  (1) A pair of vertical members (vertical members 13, 14) are connected between the upper and lower beams (upper and lower beams 11, 12) provided in the building, and energy during vibration is absorbed between the vertical members. An earthquake-resistant structure of a building, characterized in that an earthquake-resistant element (oblique member 17) having a plurality of energy absorbing portions (plastic hinge portions 17b) is provided.

  According to the configuration of (1) above, by providing a plurality of energy absorbing portions in the seismic element, it is possible to receive a load due to an external force in the seismic element and to improve the seismic performance. In addition, by providing a plurality of energy absorbing portions per seismic element, it is possible to reduce the seismic performance of each energy absorbing portion. For example, it is preferable that energy absorbing portions are provided in the vicinity of the connecting portion with the longitudinal member at both ends of the earthquake-resistant element.

  The energy absorbing portion may be a plastic hinge portion in which a plastic hinge (yield hinge) is formed by yielding a cross section by a load.

  (2) In the above (1), the seismic element is made of a steel material provided obliquely with respect to the longitudinal member, and the energy absorbing part absorbs energy during vibration by bending deformation. Seismic structure.

  (3) In the above (1) and (2), a joint portion (joint end portion 17a) to be joined to the longitudinal member in the seismic element is provided along the axial direction of the longitudinal member. An earthquake-resistant structure of a building in which a bent portion is formed at a separated position and the bent portion is the energy absorbing portion.

  According to the configuration of (3) above, the energy absorbing portion (bending portion) is formed away from the joint portion, thereby ensuring a bending deformation region of the energy absorbing portion. Therefore, a good energy absorption effect can be realized in the energy absorption part. In particular, this configuration does not require a spacer piece for securing a bending deformation region of the energy absorbing portion. Therefore, it is considered advantageous for simplifying the configuration.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the present invention is applied to a building such as a house having a steel structure, and the seismic structure is shown in FIG.

  In FIG. 1, a pair of left and right vertical members 13, 14 are provided between an upper large beam 11 and a lower large beam 12 made of H-shaped steel or the like. The vertical members 13 and 14 are each made of a square steel material, and column base plates 15 are respectively attached to the upper end portion and the lower end portion thereof. The column base plates 15 are fastened to the upper and lower large beams 11 and 12 by fasteners such as bolts and nuts, so that the vertical members 13 and 14 are connected to the large beams 11 and 12.

  Between the pair of left and right vertical members 13, 14, a plurality of diagonal members 17 as earthquake-resistant elements are provided so as to extend obliquely with respect to the vertical members 13, 14. In this embodiment, the diagonal material 17 which consists of a round steel material cross | intersects X shape, and is assembled | attached, and an earthquake-resistant structure is constructed | assembled by installing three sets up and down. The details of the seismic structure will be described below with reference to FIGS. FIG. 2 is an enlarged view showing a connecting portion of the diagonal member 17 with respect to the longitudinal member 14, and FIG. 3 is an enlarged view showing an intersecting portion of the oblique member 17.

  The diagonal member 17 has a linear shape as a whole, and a joining end portion 17a is formed by bending at both ends thereof. The joint end portion 17a is a portion extending parallel to the axial direction of the longitudinal members 13, 14 when the oblique member 17 is assembled to the longitudinal members 13, 14, and the joint end portion 17a is joined by welding or the like. The diagonal member 17 is fixed to the longitudinal members 13 and 14. At this time, the diagonal member 17 is attached so that the center is shifted in the side surface of the vertical members 13 and 14.

  Further, in the diagonal member 17, the inside of the joint end portion 17 a is a plastic hinge portion 17 b. In this case, each diagonal member 17 has two plastic hinge portions 17b per one piece. The plastic hinge portion 17b corresponds to an energy absorbing portion that absorbs vibration energy by bending deformation when an external force such as seismic force is applied. More specifically, the plastic hinge (yield hinge) is obtained by yielding a cross section by a load. This is a region in which is formed. The plastic hinge portion 17b is set on the inner side of the joining end portion 17a. Therefore, when the oblique member 17 is joined and fixed to the longitudinal members 13 and 14, the plastic hinge portion 17b is separated from the oblique member 17. Will be provided. Therefore, a bending deformation region of the plastic hinge portion 17b is secured between the longitudinal members 13 and 14, and the plastic hinge portion 17b can be deformed without interfering with the longitudinal members 13 and 14 in the region. .

  An intermediate plate 18 is provided at an intersecting portion of the two diagonal members 17 intersecting in an X shape, and the two diagonal members 17 are joined to the intermediate plate 18 by welding. 17 crossing portions are connected and fixed. At this time, the diagonal members 17 are welded to the front and back surfaces of the intermediate plate 18 one by one.

  Here, the diagonal member 17 absorbs energy by compressive bending in the plastic hinge portion 17b when a compressive force is applied (see FIG. 4). In such a case, if the slanted member 17 becomes longer, there is a concern that out-of-plane buckling will occur before energy is absorbed by compression bending, so a middle column (vertical beam) or a horizontal beam is required to prevent buckling. Become. In this respect, in the seismic structure of the present embodiment, since the two diagonal members 17 are intersected and the intersecting portions are connected, the buckling of the other oblique member 17 is restrained by the one oblique member 17. This prevents out-of-plane buckling.

  The details will be described with reference to FIG. As shown in FIG. 5A, when a leftward seismic force acts on the upper large beam of the building, a compressive load acts on one diagonal member 17A, and a tensile load acts on the other diagonal member 17B. Works. At this time, the buckling of the compression-side diagonal material 17A is restrained by the tension-side diagonal material 17B. Conversely, as shown in FIG. 5B, when a seismic force in the right direction in the figure acts on the upper beam of the building, a compressive load acts on one diagonal member 17B, and the other diagonal material. A tensile load acts on 17A. At this time, the buckling of the diagonal member 17B on the compression side is restrained by the diagonal member 17A on the tension side.

  According to the above, it is possible to prevent buckling of the oblique members 17A and 17B without providing a buckling prevention member such as a vertical beam or a horizontal beam. At this time, in each of the slant members 17A and 17B, the compression side and the tension side are alternately reversed depending on the direction of the seismic force, but in any case, the direction of the force is opposite in each of the slant members 17A and 17B. Therefore, it exhibits a sufficient seismic effect.

  According to the embodiment described in detail above, the following excellent effects can be obtained.

  Since the diagonal member 17 having the plurality of plastic hinge portions 17b is provided between the pair of longitudinal members 13 and 14, energy during vibration can be absorbed by the plastic hinge portions 17b. In particular, since two plastic hinge portions 17b are provided at both ends of the diagonal member 17, that is, each diagonal member 17, it is possible to disperse and bear the load due to external force in the diagonal member 17, thereby improving the earthquake resistance. be able to. In this case, by providing two plastic hinge portions 17b at each diagonal member 17, it is possible to lower the earthquake resistance performance of each plastic hinge portion 17b. Thereby, it is considered that merits such as easy selection of materials for the diagonal member 17 can be obtained.

  In addition, since the two diagonal members 17 are connected to each other between the longitudinal members 13 and 14, the inconvenience that lateral buckling (out-of-plane buckling) occurs before energy absorption by the plastic hinge portion 17b can be suppressed. As described above, it is possible to simplify the configuration while securing a desired seismic strength and eliminating the need for a buckling prevention member such as a vertical beam (medium column) or a horizontal beam.

  The interval between the vertical members 13 and 14 can be expanded without providing vertical bars such as middle pillars. For example, when the distance between the vertical members 13 and 14 is 1 m, the existing technique requires an intermediate column between the vertical members 13 and 14, but this intermediate column can be omitted. Since the column members and the column base plates provided at both ends of the column members can be reduced, the number of parts can be reduced.

  In the diagonal member 17, since the plastic hinge part 17b was provided in the position spaced apart from the joining end part 17a joined to each vertical member 13 and 14, it is inner side than the joining end part 17a (It was pinched | interposed with each vertical member 13 and 14). A bending deformation region of the plastic hinge portion 17b can be secured on the middle side of the intermediate region. Therefore, a good energy absorption effect can be realized in the plastic hinge portion 17b. Moreover, in this structure, the spacer piece for ensuring the bending deformation area | region of the plastic hinge part 17b is not required. Therefore, it is considered advantageous for simplifying the configuration.

  Since a plurality of diagonal members 17 are arranged in an X shape between a pair of vertical members 13 and 14, the seismic effect in a well-balanced manner is exerted regardless of which direction the seismic force acts on the upper and lower beams. Can do.

  Since the intermediate plate 18 is provided at the connecting portion of the two diagonal members 17 and each diagonal member 17 is connected to the intermediate plate 18 by welding, the welding operation is easily performed at the intersection of the diagonal members 17 made of round steel. Can be made. This also stabilizes the quality of the welded part.

  Between the pair of longitudinal members 13 and 14, a plurality of seismic structures each composed of two diagonal members 17 arranged in an X shape are arranged in the vertical direction, so that the upper and lower beams 11 and 12 and the pair of longitudinal members The seismic effect can be greatly enhanced on the same plane made of the materials 13 and 14.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 6 is a front view showing the earthquake-resistant structure in the present embodiment, and FIG. 7 is an enlarged view showing a connecting portion of the diagonal member with respect to the vertical member. 6 and 7, the same reference numerals are assigned to the same components as those in the first embodiment, such as the upper and lower large beams 11, 12 and the vertical members 13, 14, and the description thereof is omitted.

  As shown in FIG. 6, between the pair of left and right vertical members 13, 14, a plurality of diagonal members 21 as earthquake-resistant elements are provided so as to extend in an oblique direction with respect to the vertical members 13, 14. In this embodiment, the diagonal material 21 which consists of a round steel material is assembled | attached by making it cross | intersect X shape, and the earthquake-resistant structure is constructed | assembled by installing three sets up and down.

  The diagonal member 21 has a linear shape as a whole, and the joining end portion 21a is formed by bending at both ends thereof. The joint end 21a is a portion that extends parallel to the axial direction of the longitudinal members 13 and 14 when the diagonal member 21 is assembled to the longitudinal members 13 and 14, and the joint end 21a is joined by welding or the like. Thus, the diagonal member 21 is fixed to the longitudinal members 13 and 14.

  Here, the diagonal member 21 is bonded and fixed to the vertical members 13 and 14 via the spacer pieces 22, which is different from the above-described diagonal member 17 (see FIGS. 1 and 2), and accordingly, plasticity. The shape of the hinge part 21b is also different. That is, the plastic hinge portion 21b is provided at the bent end portion of the joining end portion 21a. According to this configuration, the slanted member 21 is provided in a state of being floated from the vertical members 13 and 14 by the spacer piece 22, thereby securing a bending deformation region of the slanted member 21. Therefore, in the diagonal member 21, interference with the longitudinal members 13 and 14 at the time of bending deformation is suppressed, and a good energy absorption effect can be realized.

  In addition, each diagonal material 21 is equivalent to the diagonal material 17 mentioned above, and has the plastic hinge part 21b of two places per one. Moreover, the diagonal member 21 is attached so that the center may be shifted in the side surface of the vertical members 13 and 14.

  Also in the second embodiment described in detail above, since the slanted member 21 having the plurality of plastic hinge portions 21b is provided between the pair of longitudinal members 13 and 14 as described above, the plastic hinge portion 21b vibrates. Energy of time can be absorbed. In addition, since the two diagonal members 21 are connected to each other between the longitudinal members 13 and 14, the inconvenience that lateral buckling (out-of-plane buckling) occurs before energy absorption by the plastic hinge portion 21b can be suppressed. As described above, it is possible to simplify the configuration while securing a desired seismic strength and eliminating the need for a buckling prevention member such as a vertical beam (medium column) or a horizontal beam.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. In the above embodiment, a plurality of linear seismic elements are used to cross and connect, but in this embodiment, instead of this, a plurality of seismic elements having two inclined portions are used. It is set as the structure which connects each of those top parts. FIG. 8 is a diagram showing an earthquake-resistant structure in the third embodiment.

  In FIG. 8A, two seismic bars 31 are provided between the pair of left and right vertical members 13 and 14 as seismic elements. The earthquake-resistant bar 31 is made of a round steel material, and has two inclined portions 31a extending in different directions, an intermediate portion 31b formed by bending between the two inclined portions 31a, and the intermediate portion 31b on the opposite side. And a joining end portion 31c that is bent. Then, the joint end portions 31c at both ends are connected to the vertical members 13 and 14 at positions separated in the vertical direction, so that the two seismic bars 31 are connected to the vertical members 13 and 14, respectively. In particular, the intermediate portions 31b that are the top portions of the two earthquake-resistant bars 31 are connected by welding or the like.

  In the earthquake-resistant structure shown in FIG. 8A, when an external force such as a seismic force is applied, the connecting portions of the two earthquake-resistant bars 31 (both ends of the intermediate portion 31b) become the plastic hinge portions 32, and the plastic hinge portions 32 vibrate. Time energy is absorbed. That is, when an external force such as seismic force is applied, each plastic hinge portion 32 is bent and deformed according to a compression or tensile load acting on each inclined portion 31a, and vibration energy is absorbed by the bending deformation.

  In addition, since the two seismic bars 31 are connected to each other between the longitudinal members 13 and 14, the inconvenience that lateral buckling (out-of-plane buckling) occurs before energy absorption by the plastic hinge portion 32 can be suppressed. As described above, it is possible to simplify the configuration while securing a desired seismic strength and eliminating the need for a buckling prevention member such as a vertical beam (medium column) or a horizontal beam. Also in this configuration, since each seismic bar 31 is arranged in a substantially X shape, the seismic effect in a well-balanced manner will be exhibited no matter which direction the seismic force acts on the upper and lower beams in the building. Can do.

  Further, in FIG. 8B, two seismic bars 33 are provided between the pair of left and right vertical members 13 and 14 as seismic elements. The earthquake-resistant bar 33 is made of a round steel material, has two inclined portions 33a extending in different directions, an intermediate portion 33b formed by bending between the two inclined portions 33a, and the intermediate portion 33b on the opposite side. And a joining end portion 33c formed by bending. And the two seismic bars 33 are connected to the vertical members 13 and 14 by connecting the joining end portions 33c at both ends at the same height position to the vertical members 13 and 14, respectively. In particular, the intermediate portions 33b that are the top portions of the two seismic bars 33 are connected by welding or the like.

  In the earthquake-resistant structure shown in FIG. 8B, when an external force such as a seismic force is applied, the connecting portion of the two earthquake-resistant bars 33 (both ends of the intermediate portion 33b) becomes the plastic hinge portion 34, and the plastic hinge portion 34 vibrates. Time energy is absorbed. That is, when an external force such as seismic force is applied, each plastic hinge portion 34 is bent and deformed according to a compression or tensile load acting on each inclined portion 33a, and vibration energy is absorbed by the bending deformation.

  In addition, since the two seismic bars 33 are connected to each other between the longitudinal members 13 and 14, the inconvenience that lateral buckling (out-of-plane buckling) occurs before energy absorption by the plastic hinge portion 34 can be suppressed. As described above, it is possible to simplify the configuration while securing a desired seismic strength and eliminating the need for a buckling prevention member such as a vertical beam (medium column) or a horizontal beam. Also in this configuration, since the seismic bars 33 are arranged in a substantially X shape, the seismic effect in a well-balanced manner will be exhibited regardless of which direction the seismic force acts on the upper and lower beams in the building. Can do.

  In the earthquake-resistant structure shown in FIGS. 8A and 8B, the earthquake-resistant bars 31 and 33 may have a triangular mountain shape in addition to the trapezoidal shape as illustrated. That is, in this case, the intermediate portions 31b and 33b are omitted in the respective earthquake-resistant bars 31 and 33, and the top portions of the inclined portions 31a and 33a on the two sides are connected by welding.

  Moreover, it is also possible to adopt a configuration in which the seismic bars 31 and 33 are joined and fixed to the longitudinal members 13 and 14 via spacer pieces. In this case, the plastic hinge portion is provided at the bent end portion of the joint end portions 31c and 33c (the bent portion connecting the inclined portions 31a and 33a and the joint end portions 31c and 33c).

[Another embodiment]
The present invention is not limited to the description of the above embodiment, and may be implemented as follows, for example.

  In the said embodiment, although the earthquake-resistant element (diagonal material, earthquake-resistant bar) was comprised with the round steel material, this can be changed and an earthquake-resistant element can also be comprised with another steel material. For example, diagonal materials and earthquake-resistant bars are made of square steel materials.

  In the above embodiment, in the earthquake resistant structure using a plurality of earthquake resistant elements (diagonal members 17, 21 and earthquake resistant bars 31, 33), each earthquake resistant element is connected between a pair of left and right vertical members by welding. It is also possible to connect by means other than welding. For example, a plurality of seismic elements are connected using a connecting bracket or the like.

  In the above embodiment, three seismic structures (a structure in which two seismic elements are assembled in a substantially X shape) are installed between the pair of left and right vertical members 13 and 14 in the vertical direction, but this is only an example. It is also possible to install four or more seismic structures. It is also possible to install one seismic structure between the pair of left and right vertical members 13 and 14.

The front view which shows the earthquake-resistant structure of a building. The figure which expands and shows the connection part of the diagonal material with respect to a vertical material. The figure which expands and shows the intersection of diagonal materials. Schematic for explaining the function of earthquake-resistant structure. Schematic for explaining the function of earthquake-resistant structure. The front view which shows the earthquake-resistant structure of the building in 2nd Embodiment. The figure which expands and shows the connection part of the diagonal material with respect to a vertical material. The front view which shows the earthquake-resistant structure of the building in 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Upper girder, 12 ... Lower girder, 13, 14 ... Longitudinal material, 17 ... Diagonal material (seismic element), 17a ... Joint end part, 17b ... Plastic hinge part (energy absorption part), 18 ... Intermediate plate, 21 ... Diagonal material (seismic element), 21a ... joining end, 21b ... plastic hinge part (energy absorbing part), 22 ... spacer piece, 31 ... seismic bar (seismic element), 31a ... inclined part, 32 ... plastic hinge part (energy) Absorbing part), 33 ... seismic bar (seismic element), 33a ... inclined part, 34 ... plastic hinge part (energy absorbing part).

Claims (4)

A pair of vertical members are connected between the upper and lower beams provided in the building, and energy absorbing portions that absorb energy during vibration are provided between the vertical members at both ends and in the vicinity of the connecting portion with the vertical members. Seismic elements
The seismic element is made of a steel material provided in an oblique direction with respect to the longitudinal member, and the energy absorbing portion absorbs energy during vibration by bending deformation,
The energy absorbing part is a plastic hinge part in which a plastic hinge is formed by yielding a cross section by a load,
The steel material has a linear shape as a whole,
By being bent at both ends, joint ends are formed at both ends,
The joint ends extend parallel to the longitudinal direction of the longitudinal member so that the tips are directed to different sides, and the steel members are fixed to the longitudinal member by joining the joint ends to the longitudinal member. Has been
The bent portion of the joint end extends inward, so that the plastic hinge part is formed inside the joint end at both ends of the steel material,
The plastic hinge portion is bent at an obtuse angle with respect to the oblique direction, which is the direction in which the steel material extends,
A plurality of the seismic elements are provided, and the plurality of seismic elements are arranged in a substantially X shape having a symmetrical shape in front view between the pair of longitudinal members, and an intersection of the plurality of seismic elements is Are connected,
These, the plastic hinge portion provided at both ends of the seismic elements, wherein are those bends in a direction intersecting with the oblique direction, and opposite to each other the bend orientation by plastic hinge portion of said end portions The building's seismic structure is characterized by A pair of vertical members are connected between the upper and lower beams provided in the building, and energy absorbing portions that absorb energy during vibration are provided between the vertical members at both ends and in the vicinity of the connecting portion with the vertical members. Seismic elements
The seismic element is made of a steel material provided in an oblique direction with respect to the longitudinal member, and the energy absorbing portion absorbs energy during vibration by bending deformation,
The energy absorbing part is a plastic hinge part in which a plastic hinge is formed by yielding a cross section by a load,
The steel material has a linear shape as a whole,
By being bent at both ends, joint ends are formed at both ends,
The joint ends extend parallel to the axial direction of the longitudinal member so that the distal ends thereof are directed to different sides, and both the joining end portions are disposed on the distal end side of the bent portion via the spacer piece. The steel material is fixed to the longitudinal member by being joined to
The bent portion is the plastic hinge portion;
The plastic hinge portion is bent at an obtuse angle with respect to the oblique direction, which is the direction in which the steel material extends,
A plurality of the seismic elements are provided, and the plurality of seismic elements are arranged in a substantially X shape having a symmetrical shape in front view between the pair of longitudinal members, and an intersection of the plurality of seismic elements is Are connected,
These, the plastic hinge portion provided at both ends of the seismic elements, wherein are those bends in a direction intersecting with the oblique direction, and opposite to each other the bend orientation by plastic hinge portion of said end portions The building's seismic structure is characterized by The building earthquake-resistant structure according to claim 1 or 2 , wherein an intermediate plate is provided at a connecting portion of the earthquake-resistant element, and the plurality of earthquake-resistant elements are connected to the intermediate plate by welding. The building earthquake-resistant structure according to any one of claims 1 to 3 , wherein a plurality of structures formed by connecting the plurality of earthquake-resistant elements to each other are arranged side by side in the vertical direction between the pair of vertical members.

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