JP5301741B1 - Yamagata ramen structure - Google Patents

Abstract

A Yamagata ramen structure having a large internal space is provided.
A mountain-shaped roof is formed by abutting oblique beams (12, 12) extending from the stigmas (111, 111) of a pair of struts (11, 11), a point (112) on the strut (11) descending from each stigma (111), and each stigma (111) On the diagonal beam 12 erected with the lower end 141 of the compression material 14 and the lower end 141 of the compression material 14 lowered from the apex 125 of the mountain roof, and the point 121 on the oblique beam 12 facing the vertex 125 of the mountain roof This is a chevron ramen structure 1 in which an inclined tension member 15 is installed at the point 121.
[Selection] Figure 1

Description

  The present invention relates to an improved angle-shaped ramen structure having a larger internal space than before.

  When constructing a large internal space, a mountain-shaped ramen structure is generally used in which a mountain-shaped roof is formed by abutting oblique beams extending from the stigma of each of a pair of columns, and a horizontal tension member is installed between the oblique beams. The Yamagata ramen structure can be enlarged by using a large standard member for the support and the oblique beam, and the internal space can be enlarged. However, a material having a large standard increases the material cost accordingly. Moreover, even if the standard of the member is increased, if the interval between the columns (strictly speaking, the interval between the columns of the columns) becomes too large, the stress applied to the column will increase, and the bending moment applied to the oblique beam will increase too much. It is difficult to build a Yamagata ramen structure.

  Therefore, in Patent Document 1, the angled beam extending from the stigma of each of the pair of struts is abutted to form a mountain roof, the lower end of the compressed material lowered from the top of the mountain roof, and from the stigma of the pillar to the top of the mountain roof. An angled ramen structure in which an inclined tensile member is installed at a point on the inclined beam is disclosed (Patent Document 1 and Claim 1). In the angle-shaped ramen structure disclosed in Patent Document 1, the inclined tensile material pulled outward by the bending moment of the oblique beam lifts the compression material, and the bending moment is offset by the reverse moment generated in the oblique beam. (Patent Document 1 [0012]), it is possible to construct a support column and an oblique beam with a member with a reduced standard, thereby reducing material costs and construction costs (Patent Document 1 [0039]).

Japanese Unexamined Patent Publication No. 08-189081

  The Yamagata ramen structure disclosed in Patent Document 1 gives an example in which the interval (span) between the axes of the columns is up to 60 m. However, if the spacing (span) between the axes of the struts exceeds 60 m, even the mountain-shaped ramen structure disclosed in Patent Document 1 must use a large standard member, and the spacing between the struts (span) ) Exceeds 100m, the stress applied to the column is large, and the bending moment applied to the oblique beam is too large, making it difficult to construct. Since the Yamagata ramen structure is excellent in that there is no obstacle between the columns and a continuous internal space can be formed, the usefulness increases as the interval (span) between the columns of the columns increases. Then, in order to form a larger internal space than the Yamagata ramen structure which patent document 1 discloses, it examined.

Was developed result of the examination is, at intervals of the axis of the pair of columns are truss structures 80M～120m, constitutes a chevron roof abutted by extending the Hasuhari a truss structure from stigmas of each of the struts, struts and The point on the column that falls within 5m from the intersection of the axis of the diagonal beam and the horizontal distance from the axis of the column is 3/40 to 4/40 of the distance between the axis of the pair of columns. A cane is erected at a point on the diagonal beam facing toward the lower end of the compression material lowered from the apex of the mountain roof, and a point on the oblique beam erected with the cane or on the oblique beam toward the apex from the point This is a mountain-shaped ramen structure in which an inclined tensile material is installed at the point. The lower end of the compression material may be higher than the point on the column on which the wand is constructed. The oblique beam and the inclined tensile material may be asymmetrical.

  The angle-shaped ramen structure having a large interval (span) between the axes of the columns has a large bending moment generated in the oblique beam. The angle-shaped ramen structure of the present invention receives the vertical load at the apex of the angled roof that abuts the diagonal beam with the inclined tensile material via the compression material, and transmits the vertical force at the end of the inclined tensile material to the inclined beam instead of By transmitting the brace to the column, the outer end moment of the oblique beam (moment at the connection point with the stigma at the lower end of the oblique beam) and the central moment (moment at the apex of the mountain roof where the oblique beam is abutted) are reduced. . Thereby, the angle-shaped ramen structure of this invention can extend the space | interval (span) of the axis line of a support | pillar exceeding the angle-shaped ramen structure which patent document 1 discloses.

In order to increase the span (span) of the axis of the support column, the point on the support column where the cane is installed falls within 5 m from the intersection of the axis of the support column and the oblique beam (the intersection point is considered considering the thickness of the oblique beam). 5m Ri slightly exceeding or down to) der and a point on Hasuhari for erection of Hotsue, stigma 3 / 40-4 / 40 of the spacing of the axis of the pair of struts at horizontal distance from the axis of the strut Ru der points toward the apex of the chevron roof from. This makes it possible to reduce the outer end moment of the oblique beam (moment at the connection point with the column head that is the lower end of the oblique beam) and the central moment (moment at the apex of the mountain roof where the oblique beam is abutted), and the spacing between the axis of the columns (Span) can be expanded.

When the interval (span) between the axes of the support columns is widened, there is a possibility that the oblique beam is bent or that the support columns to which the axial force of the cane is applied is subjected to bending stress and the support columns are horizontally deformed. Therefore, struts and oblique beam, as a truss structure, improve the rigidity of the strut or Hasuhari. Trusses structure is less expensive than build H-section steel, case of realizing the stiffness comparable to the build H-section steel is advantageous is lighter than build H-section steel. Truss structure, for example can be configured using the H-shaped steel is a standard product in the main material (upper chord member and the lower chord member) or lattice.

The Yamagata ramen structure of the present invention can form a larger internal space compared to the Yamagata ramen structure disclosed in Patent Document 1, and increases the usefulness as the Yamagata ramen structure. The internal space is a point that falls within 5m from the intersection of the axis of the column and the oblique beam, and is 3/40 to 4/40 of the horizontal distance from the axis of the column and the distance between the axis of the pair of columns. It can be enlarged by widening the interval (span) of the axis of the column with a wand connecting the point toward the apex. Further, by making the struts and diagonal beams and truss structure, the rigidity of the strut and Hasuhari, with an increasing distance between the axis of the strut of chevron rigid frame structure of the present invention (span) to 120 m, the material cost and construction Cost can be reduced.

It is a schematic diagram of the Yamagata ramen structure which is an example to which this invention is applied. It is the elements on larger scale showing the support | pillar and oblique beam of a truss structure used for the Yamagata ramen structure of this example. It is a schematic diagram of the Yamagata ramen structure which is an example to which a conventional invention is applied. It is a schematic diagram of a basic Yamagata ramen structure.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. As shown in FIG. 1, a mountain-shaped ramen structure 1 constructed by applying the present invention forms a mountain-shaped roof by abutting oblique beams 12, 12 extending from the stigmas 111, 111 of a pair of columns 11, 11. , A cane 13 is erected from the point 112 on the support pillar 11 descending from each stigma 111 and the point 121 on the oblique beam 12 from each stigma 111 to the vertex 125 of the mountain roof, and from the vertex 125 of the mountain roof The inclined tension member 15 is constructed at a lower end 141 of the lowered compression member 14 and a point 121 on the oblique beam 12 on which the brace 13 is constructed.

  The angle-shaped ramen structure 1 of the present invention has a size that constitutes an internal space in which the interval (span) S between the axes 113 of the struts is 120 m and the height (effective height) to the lower end 141 of the compressed material 14 is about 20 m. Assumed. Therefore, the present invention can be applied to a mountain-shaped ramen structure 1 smaller than the above-described size, for example, one having an interval S between the axes 113 of the columns 11 of 80 m and an effective height of about 10 m. As described above, when the distance S between the axes 113 of the support columns 11 is reduced or the effective height is reduced, the Yamagata ramen structure to which the present invention is applied reduces the standard of the material to be used and is reduced in weight. be able to.

  As shown in FIG. 2, each of the angle-shaped ramen structures 1 according to the present invention has a truss as shown in FIG. 2 so that the long oblique beam 12 does not bend and the column 11 is not horizontally deformed by the axial force of the wand 13. It should be structured. The truss structure column 11 is configured by, for example, an H-shaped steel 115 serving as a lattice being obliquely bridged between H-shaped steels 114 and 114 serving as left and right main materials, and an intermediate line between the H-shaped steels 114 and 114 serving as a main material is This is the axis 113. In addition, the truss-structured oblique beam 12 is configured by, for example, an H-shaped steel 124, which is a lattice, bridged diagonally between H-shaped steels 123, 123, which are upper and lower main materials. This is the axis 122 of the oblique beam 12.

  Since the truss-structured columns 11 and the oblique beams 12 can be configured using H-shaped steel, which is a standard product and is easily available, there is an advantage that it is easy to design and can be manufactured at low cost. Although it is conceivable to use a build H-shaped steel in place of the column 11 and the oblique beam 12 of the truss structure of this example, the use of the build H-shaped steel, which is a so-called non-standard product, increases the material cost. There is. The angle-shaped ramen structure 1 of the present invention has the same type of angle-shaped ramen structure as long as the distance S is the same because of the effect of increasing the distance S between the axes 113 and 113 of the columns 11 and 11 by reducing the outer end moment and the center moment of the oblique beam. There is an advantage that the material cost can be reduced by lowering the standard than the one (see Fig. 3 below). From this, it can be seen that the column 11 and the oblique beam 12 having the truss structure are preferable to the build H-shaped steel which increases the material cost.

  A point 112 on the column on which the cane 13 is erected is a point lower by ΔH set within a range of 5 m or less from the intersection of the axis 113 of the column 11 and the axis 122 of the oblique beam 12. ΔH is set such that the effective height (the height of the lower end 141 of the compression member 14) as the angle-shaped ramen structure 1 is higher than the point 112 on the support column on which the wand 13 is constructed. Further, the point 121 on the oblique beam 12 on which the wand 13 is constructed is set within a range of 3/40 to 4/40 of the distance S between the axis 113, 113 of the pair of columns 11, 11 at a horizontal distance from the axis 113 of the column 11. It is the point that headed from the stigma 111 to the apex 125 of the mountain-shaped roof with ΔS. In this example, the point 121 on the oblique beam 12 on which the cane 13 is constructed and the point on the oblique beam 12 on which the inclined tension member 15 is constructed coincide with each other.

  Yamagata ramen structure 1 to which the present invention is applied (see Examples 1 to 3 and FIG. 1), and Yamagata ramen structure to which the conventional invention (invention described in Japanese Patent Laid-Open No. 08-189081) is applied. 2 (Comparative Example 1 to Comparative Example 3, see FIG. 3), and the conventional basic mountain-shaped ramen structure 3 (Comparative Example 4 to Comparative Example 6 see FIG. 4), each vertical roof has a vertical overload of 10 kN / m. The stresses in the columns 11, 21, and 31 and the oblique beams 12, 22, and 32 were calculated and compared.

  The angle-shaped ramen structure 2 to which the conventional invention is applied includes a lower end 241 of a compression member 24 lowered from an apex 225 of a mountain-shaped roof that abuts diagonal beams 22 and 22 extending from the heads 211 and 211 of the pair of support columns 21 and 21, respectively, An inclined tension member 25 is constructed at a point 221 on the oblique beam 22 from 211 to the vertex 225. In addition, the conventional basic mountain-shaped ramen structure 3 constitutes a mountain-shaped roof by abutting oblique beams 32, 32 extending from the stigmas 311, 311 of the pair of columns 31, 31 respectively.

  In Example 1, Comparative Example 1 and Comparative Example 4, the interval S = 120 m, the height of the columns 11, 21, 31 is 25 m, and the heights of the peaks 125,225,325 of the mountain roof are 34 m. The height of the lower end 141 of the compression materials 14 and 24 used in the embodiment is 20 m, the horizontal distance ΔS of the wand 13 used in the first embodiment is 12 m, and the vertical distance ΔH is 5 m. The lower end of the material 14 and the point 112 on the column 11 on which the wand 13 is laid were set to the same height.

  In Example 2, Comparative Example 2 and Comparative Example 4, the distance S = 100 m, the height of the columns 11, 21, 31 is 25 m, and the heights of the peaks 125,225,325 of the mountain roof are 32.5 m. The height of the lower end 141 of the compression members 14 and 24 used in 2 = effective height is 20 m, the horizontal distance ΔS of the wand 13 used in the second embodiment is 10 m, and the vertical distance ΔH is 5 m. The lower end of the compression material 14 and the point 112 on the support column 11 on which the wand 13 is installed were set to the same height.

  In Example 3, Comparative Example 3 and Comparative Example 6, the distance S = 80 m, the height of the columns 11, 21, 31 is 25 m, and the heights of the peaks 125,225,325 of the mountain roof are 31 m. The height of the lower end 141 of the compression members 14 and 24 used in the embodiment is 20 m, the horizontal distance ΔS of the wand 13 used in the third embodiment is 8 m, the vertical distance ΔH is 5 m, and the compression in the third embodiment. The lower end of the material 14 and the point 112 on the column 11 on which the wand 13 is laid were set to the same height.

  The calculation results are shown in Table 1. In Table 1, the numbers in parentheses are Examples 1 to 3 or Comparative Examples 1 to Comparative Example 4 to Comparative Example 6 (formerly basic Yamagata ramen structure 3) as a reference (100%). It is the ratio (percentage display) of Example 3. The angle-shaped ramen structure 2 to which the conventional invention is applied also has a smaller moment M and axial force N applied to the support column 21 and the oblique beam 22 than the conventional basic angle-shaped ramen structure 3, but the present invention is applied. It can be seen that the angle-shaped ramen structure 1 has the moment M and the axial force N equal to or smaller than the angle-shaped ramen structure 2 to which the conventional invention is applied. Thereby, if the present invention is used, it can be understood that a mountain-shaped ramen structure that forms a vast indoor space can be constructed.

  Next, on the assumption of the stress in Table 1, the specific material configurations of Examples 1 to 3 and Comparative Examples 1 to 6 are selected, and the steel frame weights of only the Yamagata ramen structures 1, 2, and 3 are selected. Compared. For comparison, the struts 11, 21, 31 and the oblique beams 12, 22, 32 of Examples 1 to 3 and Comparative Examples 1 to 6 all have a truss structure in which H-shaped steels are combined. The truss structure of Example 1, Example 2, Comparative Example 1, Comparative Example 2, Comparative Example 4 and Comparative Example 5 has the main material web spacing of 3.0 m, and the trusses of Example 3, Comparative Example 3 and Comparative Example 6 In the structure, the web interval of the main material is 2.0 m. In addition, the cane 13, the compression members 14, 24 and the inclined tension members 15, 25 of Examples 1 to 3 and Comparative Examples 4 to 6 are all round steel pipes.

  As is apparent from Table 2, the Yamagata ramen structure 2 to which the conventional invention is applied has a required steel weight of 92% (Comparative Example 1), 80% (compared to the conventional basic Yamagata ramen structure 3). It can be seen that Comparative Example 2) or 87% (Comparative Example 3) is suppressed and only 8% to 20% is required. This is because when the struts 21 and 31 and the oblique beams 22 and 32 have the same truss structure, the conventional invention is applied while reducing the material cost by 8% to 20% compared to the conventional basic angle-shaped ramen structure 3 This means that the Yamagata ramen structure 2 can be constructed.

  The Yamagata ramen structure 1 to which the present invention is applied has a required steel frame weight of 76% (Comparative Example 1), 70% (Comparative Example 2) or 65%, compared with the conventional basic Yamagata ramen structure 3. It can be seen that (Comparative Example 3) is suppressed and only 24% to 35% is required. This is because when the struts 11 and 31 and the oblique beams 12 and 32 have the same truss structure, the present invention is applied while reducing the material cost by 24% to 35% compared to the traditional basic angle-shaped ramen structure 3. This means that the Yamagata ramen structure 1 can be constructed.

  Furthermore, it can be seen that the Yamagata ramen structure 1 to which the present invention is applied requires an average of about 15% less steel weight than the Yamagata ramen structure 2 to which the conventional invention is applied. As described above, the Yamagata ramen structure 1 to which the present invention is applied requires the smallest steel frame weight as compared with the conventional invention and the conventional structure, and can be constructed at a low cost by reducing the material cost. Thereby, it turns out that this invention has the effect which can enlarge the indoor space of the Yamagata ramen structure 1, or if the indoor space of the same magnitude | size can construct the Yamagata ramen structure 1 more cheaply than before.

1 Yamagata ramen structure
11 support
111 Capital
112 Points on the column
113 Prop axis
114 Main H-shaped steel
115 Lattice H-Shaped Steel
12 Oblique beam
121 Points on diagonal beams
122 Oblique beam axis
123 Main H-shaped steel
124 lattice H-shaped steel
125 Top of mountain roof
13 staff
14 Compressed material
141 Bottom edge of compressed material
15 Inclined tensile material 2 Yamagata ramen structure
21 Prop
211 Capital
22 Oblique beam
221 Points on diagonal beams
225 Apex of Yamagata roof
24 Compressed material
241 Lower edge of compressed material
25 Inclined tensile material 3 Yamagata ramen structure
31 Prop
311 Capital
32 Oblique beam
325 Apex of Yamagata roof S Distance between strut axes ΔS Horizontal distance from strut axis ΔH Vertical distance from intersection of strut and oblique beam axes

Claims (1)

At intervals of the axis of the pair of posts are truss structures 80M～120m, constitutes a chevron roof abutted by extending the Hasuhari a truss structure from stigmas of each said strut,
The point on the column that falls within 5m from the intersection of the axis of the column and the diagonal beam, and the horizontal distance from the column axis of the column is 3/40 to 4/40 of the interval between the axis of the pair of columns. A cane was erected at a point on the oblique beam toward the top of the
A mountain-shaped ramen structure in which an inclined tensile material is installed at the lower end of the compressed material lowered from the apex of the mountain-shaped roof and the point on the oblique beam where the cane is installed or the point on the oblique beam from the point toward the apex. .

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