JP3921122B2 - Seismic building structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an earthquake-resistant building structure that is improved in earthquake resistance in order to prevent damage to a reinforced concrete building due to rolling vibration such as an earthquake.
[0002]
[Prior art]
In recent years, in order to improve the seismic strength of reinforced concrete buildings, the wall and beam body and the wall and column body are connected by a reinforcing bar anchor, and the wall is parallel to the surface during the earthquake (in-plane direction). ) And a vertical direction (out-of-plane direction), and an earthquake-resistant slit material is interposed in the gap between the wall body and the beam body and the column body, so that the wall body, beam body and column during the earthquake A device that absorbs stress load due to compression, pulling, etc. between bodies is known.
[0003]
For example, as shown in the left diagram of FIG. 12, an earthquake-resistant slit material 61 made of polyethylene foam or the like is interposed in a gap d of about 25 mm between the wall body X ′ and the beam body X ″ of the reinforced concrete building X. At the same time, the wall body X ′ and the beam body X ″ are connected to each other by a reinforcing bar anchor 62 having a thickness of about 10 mmφ and a length of about 500 mm to reinforce earthquake resistance. Although not shown, seismic reinforcement between the wall body and the column body is also performed in the same manner as described above.
[0004]
[Problems to be solved by the invention]
However, in the conventional seismic reinforcement method described above, the reinforcing bar anchor 62 is bent and deformed by the gap d between the wall body X ′ and the beam body X ″ as shown in the right diagram of FIG. There is a fear that the large shear strain generated here may cut the reinforcing bar anchor 62, which is a support shaft for seismic reinforcement, that is, the wall body X 'causes a lateral shift in the direction of the arrow x. The reinforcing bar anchors 62 embedded and fixed on the X ′ side and the beam body X ″ side remain as they are, but in the gap d, the reinforcing bar anchors 62 are bent at an acute angle θ ′ and stretched in the y direction. In the worst case, there was a problem of disconnection.
[0005]
The present invention has been made to solve such a conventional problem, and even if horizontal vibration is generated in a reinforced concrete structure due to an earthquake or the like, the wall, the beam, and the column are damaged. An object of the present invention is to provide an earthquake-resistant building structure that is not damaged or damaged.
[0006]
[Means for Solving the Problems]
The present invention, in order to solve the above problems, in the structure that Retrofit reinforced concrete buildings, walls and Haritai, interposed slits buffer material in the gap between the pillar, wall and Haritai, pillars The present invention is characterized in that a cushioning material is attached to a reinforcing bar anchor that connects between bodies, and the reinforcing bar anchor is covered with a plastic flexible film to form an earthquake-proof reinforcing portion .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a schematic front view showing an earthquake-resistant building structure of the present invention, FIG. 2 is a cross-sectional view showing an embodiment of a vertical reinforcing portion in the present invention, and FIG. 3 is shown in FIG. FIG. 4 is a side view for explaining the operation of the vertical reinforcing portion, FIG. 4 is a cross-sectional view showing an embodiment of the horizontal reinforcing portion in the present invention, and FIG. 5 is the horizontal reinforcing shown in FIG. FIG. 6 is a cross-sectional view showing another embodiment of the horizontal reinforcing portion in the present invention.
7 is a longitudinal sectional view of the protective cap, FIG. 8 is a sectional view showing another embodiment of the vertical reinforcing portion in the present invention, and FIG. 9 is a vertical reinforcing portion shown in FIG. FIG. 10 is a cross-sectional view illustrating another embodiment of the horizontal reinforcing portion in the present invention, and FIG. 11 illustrates the operation of the horizontal reinforcing portion shown in FIG. It is a side view explaining.
[0008]
As shown in the figure, the present invention provides a structure for seismic reinforcement of a reinforced concrete building X, with a slit buffer 11 interposed in a gap d between the wall X1, the beam X2, and the column X3, and the wall X1. A cushion member 122 is attached to a reinforcing bar anchor 121 that connects the beam body X2 and the column body X3 to form the seismic reinforcement part 12.
[0009]
Further, the reinforcing bar anchor 121 connecting the wall body X1, the beam body X2, and the column body X3 is covered with a flexible film 123 made of plastic .
[0010]
Then, at least a part of the reinforcing bar anchor 121 that connects the wall body X1 and the beam body X2 in the vertical direction is covered with the flexible film 123, and the connecting boundary portion 13 of the reinforcing bar anchor 121 embedded in the concrete Y is provided. Is covered with a cushion material 122 (cylindrical cushion 122 '), or at least a part of the reinforcing bar anchor 121 that connects the wall body X1 and the column body X3 in the horizontal direction is covered with the flexible film 123, and A cushioning member 122 (columnar cushion 122 ″) is disposed at one or both ends of the reinforcing bar anchor 121 embedded in the concrete to form the seismic reinforced portion 12.
[0011]
According to the present invention, even if horizontal vibration occurs in the reinforced concrete building X due to an earthquake or the like, the slit cushioning material 11 is interposed between the wall body X1 and the beam body X2 and between the wall body X1 and the column body X3. In addition, the cushion member 122 is attached to the reinforcing bar anchor 121 (preferably, the reinforcing bar anchor 121 covered with the flexible film 123) that connects the wall body X1, the beam body X2, and the column body X3. When the cushioning material 11 and the cushioning material 122 provide a cushioning action, and the flexible anchor 123 is covered with the flexible film 123, the contact surface between the concrete and the flexible film 123 of the reinforcing bar anchor 121 easily slides. The vibration is absorbed between the wall body X1, the beam body X2, and the column body X3, and the damage between the wall body X1, the beam body X2, and the column body X3 can be prevented. One in which the effect can be obtained.
[0012]
【Example】
As shown in FIGS. 1 and 2, the seismic reinforcement structure 1 of the present invention includes a slit buffer 11 interposed in a gap d1 between a wall body X1 and a beam body X2 of a reinforced concrete building X, and the wall The connecting boundary portion 13 of the reinforcing bar anchor 121 that connects the body X1 and the beam body X2 in the vertical direction is surrounded by the cylindrical cushion 122 ′ of the cushion material 122, preferably embedded in the wall body X1 of the reinforcing bar anchor 121. A vertical reinforcing portion 12-1 is formed by covering the side to be processed with the flexible film 123.
[0013]
As described above, by forming the vertical reinforcing portion 12-1, as shown in FIG. 3, even if the wall body X1 is laterally displaced in the direction of the arrow x due to a roll such as an earthquake, the wall body X1 and the beam The reinforcing bar anchor 121 between the body X2 and the body X2 is surrounded by the cylindrical film 122 'at the connection boundary 13 and the flexible film 123 on the side of the wall body X1, so that the reinforcing bar anchor 121 becomes a concrete surface. Since the rebar anchor 121 is only slightly bent and deformed with an obtuse angle θ within the total thickness range of the cylindrical cushion 122 ′ and the gap d, the shear strain is small and the rebar anchor 121 is cut. There is no fear.
[0014]
The rebar anchor 121 connecting the wall body X1 and the beam body X2 may be partially covered with the flexible film 123 as described above, and the entire rebar anchor 121 may be the flexible film. 123 may be covered.
[0015]
On the other hand, as shown in FIGS. 1 and 4, a slit cushioning material 11 is interposed in the gap d2 between the wall body X1 and the column body X3 of the reinforced concrete building X, and the space between the wall body X1 and the column body X3 is horizontal. A cylindrical cushion 122 ″ is disposed at one end of the reinforcing bar anchor 121 connected to the wall X1 side (or both ends on the wall X1 side and the column X3 side, not shown), and the reinforcing bar The wall body X1 side of the anchor 121 is covered with the flexible film 123 to form a horizontal reinforcing portion 12-2.
[0016]
As described above, if the reinforcing portion 12-2 is formed in the horizontal direction between the wall body X1 and the column body X3, the wall body X1 rolls due to an earthquake or the like as shown in FIG. When the side moves to the column body X3 by the arrow x, the reinforcing bar anchor 121 covered with the flexible film 123 relatively enters the wall body X1 side by the arrow x ′, so that the cylindrical cushion 122 ″ is moved. It is compressed elastically, where the rolling shock vibration between the wall body X1 and the column body X3 is absorbed and alleviated.
[0017]
The reinforcing bar anchor 121 connecting the wall body X1 and the column body X3 may be partially covered with the flexible film 123 as described above, but the whole is covered with the flexible film 123. It may be done.
[0018]
As the reinforcing bar anchor 121, a round bar, a square bar, or the like made of iron, stainless steel, plastic, or the like, and a rust-proofed one or the like is used.
As the slit cushioning material 11 and the cushioning material 122 (cylindrical cushion 122 ′ and cylindrical cushion 122 ″), a closed foam resin made of polyolefin plastic such as polyethylene and polypropylene is preferably used.
[0019]
The flexible film 123 covering the reinforcing bar anchor 121 is made of a plastic such as polyethylene and polypropylene having excellent wear resistance and chemical resistance, and is in a state of being in close contact with the reinforcing bar anchor 121 or In a state where the reinforcing bar anchor 121 is wrapped in a bag shape, the wall concrete and the reinforcing bar anchor 121 are insulated.
[0020]
As described above, according to the present invention, the wall body and the beam body, and the wall body and the column body are connected by the reinforcing bar anchor so as to restrain the wall body portion from swinging in the out-of-plane direction. By attaching a cushioning material to and covering with a flexible film, the reinforcing bar anchor can be deformed or moved following the wall body in the in-plane direction to achieve the intended purpose. It is.
[0021]
In the reinforcement part shown in FIG. 4, as shown in FIG. 6, the cushion material 122 and the reinforcing bar anchor 121 are protected for the purpose of safety of the operator during transportation of the reinforcing bar anchor 121 and the protection of the cushioning material 122 after construction. A protective cap 124 that covers one end may be provided.
The protective cap 124 is a bottomed or bottomless cylindrical body made of an appropriate plastic having a fixed shape so that the reinforcing bar anchor 121 can move inside and the cushion material 122 can be compressed.
[0022]
According to the present invention, even if horizontal vibration occurs in a reinforced concrete building due to an earthquake or the like, a slit cushioning material interposed between a wall body and a beam body and between a wall body and a column body, or a cushion material is attached, The seismic reinforcement that uses the reinforced anchors covered with flexible film as the anchoring shaft absorbs the rolling vibration and eliminates the damage between the wall, the beam, and the wall. The effect that seismic strength is ensured is obtained.
[0023]
Further, a protective cap 125 as shown in FIG. 7 may be employed to form a vertical or horizontal reinforcing portion. The protective cap 125 is a bottomed cylindrical body made of an appropriate plastic having a formability such as polyethylene or polypropylene, and a protruding portion 126 is formed on an inner wall surface at an appropriate position.
By bringing the tip of the reinforcing bar anchor 121 into contact with the protruding portion 126 of the protective cap 125, it is possible to prevent an operator from being injured by the reinforcing bar anchor 121 during transportation, and during construction, the reinforcing bar anchor 121 and the protection are protected. The cap 125 can be easily positioned.
The protruding amount of the protruding portion 126 is about 0.5 mm, and when the reinforcing bar anchor 121 moves, the protruding portion 126 can be crushed and overcome.
[0024]
The vertical reinforcing portion 12-3 shown in FIG. 8 is provided with a slit cushioning material 11 in the gap d1 between the wall body X1 and the beam body X2 of the reinforced concrete building X, and between the wall body X1 and the beam body X2. The connecting boundary portion 13 of the reinforcing bar anchor 121 connected in the vertical direction is surrounded by the cylindrical cushion 122 'of the cushioning material 122, and one end portion of the reinforcing bar anchor 121 on the wall body X1 side is covered with the protective cap 125. The outer periphery of 122 ′, the reinforcing bar anchor 121, and the protective cap 125 is formed by covering with the flexible film 123.
[0025]
As described above, by forming the vertical reinforcing portion 12-3, as shown in FIG. 9, even if the wall body X1 is laterally displaced in the direction of the arrow x due to a roll such as an earthquake, the wall body X1 and the beam Reinforcing bar anchor 121 between body X2 has cylindrical cushion 122 'interposed at its connecting boundary 13 and is surrounded by flexible film 123, so that reinforcing bar anchor 121 slides down from the concrete surface in the y direction. At the same time, within the total thickness range of the cylindrical cushion 122 ′ and the gap d1, the reinforcing bar anchor 121 is only slightly bent and deformed with an obtuse angle θ, so that the shear strain is small and there is no possibility of the reinforcing bar anchor 121 being cut.
And since the one end part of the reinforcing bar anchor 121 is coat | covered with the protective cap 125, it can move to ay direction more smoothly along the inner wall face of the protective cap 125. FIG.
[0026]
On the other hand, the horizontal reinforcing portion 12-4 shown in FIG. 10 has a slit cushioning material 11 interposed in the gap d2 between the wall body X1 and the column body X3 of the reinforced concrete building X, and the wall body X1 and the column body X3. One end (or both ends on the wall X1 side and the column body X3, not shown) of the reinforcing bar anchor 121 that connects the reinforcing bars 121 in the horizontal direction is covered with the protective cap 125, and the reinforcing bar The protective cap adjacent portion 14 of the anchor 121 is surrounded by the cylindrical cushion 122 ′ of the cushion material 122, and the outer periphery of the reinforcing bar anchor 121, the cylindrical cushion 122 ′, and the protective cap 125 is covered with the flexible film 123. It is.
[0027]
As described above, by forming the horizontal reinforcing portion 12-4, as shown in FIG. 11, the wall body X1 rolls due to an earthquake or the like, and the wall body X1 side moves to the column body X3 by the arrow x. In this case, the reinforcing bar anchor 121 covered with the flexible film 123 relatively enters the wall body X1 side by the arrow x ', and one end of the reinforcing bar anchor 121 passes through the space in the protective cap 125. By moving, the cylindrical cushion 122 ′ is elastically compressed by the protective cap 125, where the rolling impact vibration between the wall body X 1 and the column body X 3 is absorbed and alleviated.
And since the one end part of the reinforcing bar anchor 121 is coat | covered with the protective cap 125, it can move to an x direction more smoothly along the inner wall face of the protective cap 125. FIG.
[0028]
As described above, by covering the one end portion of the reinforcing bar anchor 121 with the protective cap 125, the behavior of the reinforcing bar anchor 121 becomes smoother when the wall body X1 rolls due to an earthquake or the like, and the roll vibration is more sufficient. It is possible to obtain an effect that the wall body, the beam body, and the damage between the wall bodies are eliminated.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing an earthquake-resistant building structure of the present invention.
FIG. 2 is a cross-sectional view showing an embodiment of a vertical reinforcing portion in the present invention.
3 is a cross-sectional view for explaining the operation of a vertical reinforcing portion shown in FIG. 2;
FIG. 4 is a cross-sectional view showing an embodiment of a horizontal reinforcing portion in the present invention.
5 is a cross-sectional view illustrating the operation of the horizontal reinforcing portion shown in FIG.
FIG. 6 is a cross-sectional view showing another embodiment of the horizontal reinforcing portion in the present invention.
FIG. 7 is a longitudinal sectional view of a protective cap.
FIG. 8 is a cross-sectional view showing another embodiment of the vertical reinforcing portion in the present invention.
9 is a cross-sectional view illustrating the operation of the vertical reinforcing portion shown in FIG.
FIG. 10 is a cross-sectional view showing another embodiment of the horizontal reinforcing portion in the present invention.
11 is a cross-sectional view illustrating the operation of the horizontal reinforcing portion shown in FIG.
FIG. 12 is a cross-sectional view showing a conventional vertical reinforcing portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seismic building structure 11 Slit buffer material 12 Seismic reinforcement part 12-1 Vertical reinforcement part 12-2 Horizontal reinforcement part 121 Reinforcement anchor 122 Cushion material 122 'Cylindrical cushion 122 "Cylindrical cushion 123 Flexible film 125 Protective cap 13 Connection boundary 14 Protective cap adjacent part d (d1, d2) Slit gap X Reinforced concrete building X1 Wall X2 Beam X3 Column

Claims (5)

Attachment in structure to seismic retrofitting a concrete building, wall and Haritai, interposed slits buffer material in the gap between the pillar, wall and Haritai, the cushioning material rebar anchors for connecting the columnar body A seismic building structure characterized in that a seismic reinforcement part is formed by covering the reinforcing bar anchor with a plastic flexible film . Covering at least a part of the reinforcing bar anchor that connects the wall body and the beam body in the vertical direction with the flexible film, and surrounding the connecting boundary portion of the reinforcing bar anchor embedded in the concrete with the cushion material The earthquake-resistant building structure according to claim 1 , wherein an earthquake-resistant reinforcing portion is formed. At least a part of the reinforcing bar anchor that connects the wall and the column body in the horizontal direction is covered with the flexible film, and the cushion material is disposed at one end or both ends of the reinforcing bar anchor embedded in concrete. The seismic building structure according to claim 1 , wherein the seismic reinforcement part is formed. The connecting boundary portion of the reinforcing bar anchors for connecting the walls and the beam body in the vertical direction as well as surrounded by the cushion material, to cover the end portion of the wall side of the reinforcing bar anchor with a protective cap, the cushion material, the reinforcing bars anchor, and covers the outer periphery of the protective cap with the flexible film, seismic building structure according to claim 1, characterized in that the formation of the earthquake-proof reinforcement part. The one or both ends of the reinforcing bar anchors for connecting the walls and the bar member in the horizontal direction while covered with a protective cap, surround the protective cap adjacent portion of the reinforcing bar anchor the cushion material, the reinforcing steel anchor, wherein cushioning material, to cover the outer periphery of the protective cap with the flexible film, seismic building structure according to claim 1, characterized in that the formation of the earthquake-proof reinforcement part.

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