JP2020037828A - Pentagon rigid-frame structure - Google Patents

Abstract

To provide a rigid-frame structure which can be used irrespective of the size of a span, and can further reduce a material cost and a construction cost with a large span (80 m or more).SOLUTION: In a pentagon rigid-frame structure 1, lower diagonal beams 14 having relatively high gradients and upper diagonal beams 15 having relatively lower gradients extend in this order from a column head of supports 11 erected with a constant span and the upper diagonal beams 15 are made to abut on each other at an apex of a span center, and diagonal tension materials 12 are installed between the lower end and the column head at a position lower than the column head of a compressive material 13 suspended from the apex.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pentagonal ramen structure having a pentagonal roof.

  The rigid frame structure that rigidly connects the column and the beam is used to construct a column or a beam that can withstand the stress generated by the vertical load when the spacing between the columns (axial line distance = span) is to be increased as it is. Steel materials (mainly H-type ropes) have to be increased in standard, resulting in an overall increase in material costs, making it impossible to construct a large span building practically. Then, in order to construct a building with a large span, a mountain-shaped ramen structure has been proposed in which a compression material is added to push up a mountain-shaped roof formed by a diagonal beam (Patent Documents 1 and 2).

  Patent Document 1 discloses a mountain-shaped roof formed by abutting sloping beams extending from a capital of a support column, a compressed material lower end hanging from a vertex where the sloping beams are abutted, and a sloping beam having a fixed distance from the capital or the capital to the apex. Disclosed is a mountain-shaped frame structure in which an inclined tensile member is installed between the upper point and the upper point (Patent Document 1 [Claim 1]). When installing the inclined tensile member, an inward pretension may be hung on the capital (Patent Document 1 [Claim 5]). This makes it possible to withstand the stress generated by the vertical load even if the standard of the steel material used is reduced, reducing the material cost and construction cost (up to about 15%, up to about 30% with pretension) (Patent Document 1 [0039]).

  Patent Literature 2 configures a mountain-shaped roof by abutting a diagonal beam extending from a capital of a column, erection a bridge at a point on a column and a point on a diagonal beam, and suspends from a vertex at which the diagonal beam is abutted. Disclosed is a mountain-shaped rigid frame structure in which an inclined tensile member is installed between a lower end of a compression member and a point on the diagonal bridge on which the brace is installed or a point on the diagonal bridge from the point to the vertex (Patent Document 2). [Claim 1]). One or both of the columns and the diagonal beams are preferably truss structural materials (Patent Document 2 [Claim 4]). As a result, it is possible to reduce the material cost and the construction cost while increasing the rigidity of the columns and the diagonal beams and widening the span to 120 m (Patent Document 2, [0010]).

JP 08-189081 A JP 2014-139372 Gazette

  Although the mountain-shaped ramen structure disclosed in Patent Document 1 can be used for a building having a span of less than 80 m, it is difficult to use it for a building having a large span of more than that because the specifications of the diagonal beams and columns are too large. For this reason, a building having a span of 80 m or more uses a mountain-shaped ramen structure disclosed in Patent Document 2. The Yamagata ramen structure disclosed in Patent Literature 2 needs to use a non-standard build H-type rope in order to resist stress due to a vertical load. We propose the use of truss-structured beams and columns. However, truss-structured diagonal beams and columns also require material costs and construction costs. Thus, there is still room for reducing material costs and construction costs in large span buildings.

  Further, although the Yamagata ramen structure disclosed in Patent Document 2 can be used for a building with a span of less than 80 m, the performance is excessive, and the material cost and the construction cost are higher than the Yamagata ramen structure disclosed in Patent Document 1. . From now on, the angle-shaped ramen structure disclosed in Patent Document 1 and the angle-shaped ramen structure disclosed in Patent Document 2 will be selectively used according to the span. However, it is not practical to properly use the ramen structure according to the span because it is difficult to set the span as the boundary. Therefore, a ramen structure that can be used regardless of the size of the span and that further reduces material costs and construction costs with a large span (80 m or more) was studied.

  As a result of the examination, the thing developed as a result of extending the lower slope beam with a relatively high slope and the upper slope beam with a relatively low slope from the capital of a column erected at a span This is a pentagonal rigid frame structure in which beams are abutted at the top of the center of the span, and an inclined tensile member is erected between the lower end of the compressed material hanging down from the top and the lower end of the lower part of the capital and the capital. Although the members used for each part are not limited, a configuration using an H-shaped rope for the column, the lower oblique beam and the upper oblique beam, a round pipe for the compression material, and a round pipe or an angle material for the inclined tension material can be exemplified.

  The pentagonal rigid frame structure according to the invention is, as in the invention described in Patent Document 1 or Patent Document 2, in which the inclined tensile material subjected to the stress of the lower and upper diagonal beams due to the vertical load lifts the compressed material and reduces the stress in the opposite direction. The stresses generated in the lower and upper sloping beams cancel each other out and improve the structural strength of the building. In the pentagonal rigid frame structure of the present invention, the lower oblique beam and the upper oblique beam as a whole are upwardly projecting oblique beams, reducing the stress generated in the oblique beams against vertical loads, further improving the structural strength of the building. Let it. Further, the distance between the lower and upper oblique beams and the inclined tensile member is larger than the distance between the inclined beam and the inclined tensile member described in Patent Document 1 or Patent Document 2, and the action of the inclined tensile member (stress Offset) to further enhance the structural strength of the building.

  The capital is the intersection of the axis of the column and the axis of the lower oblique beam. The vertices are the intersections of the axes of the upper oblique beams that form a pair. The inclined tensile member is erected by connecting the lower end of the compressed material and the capital by an axis. "Relatively high slope lower slope" and "relatively lower slope upper slope" mean that the slope of the lower slope is greater than the slope of the upper slope when comparing the respective slopes I do. As a result, the oblique beam formed by the lower oblique beam and the upper oblique beam always protrudes upward.

  The lower oblique beam and the upper oblique beam may have different lengths, and it is preferable that the horizontal length of each of the lower oblique beam and the upper oblique beam is / span from the viewpoint of being viewed as an integral oblique beam as a whole. The horizontal length is the horizontal length of the axis. The material length (length of the axis) of the lower and upper diagonal beams is slightly higher than that of the lower and upper diagonal beams, even if the horizontal length is the same. Longer (differences of less than several tens of centimeters with a span of 60m). However, the lower oblique beam and the upper oblique beam having the same horizontal length receive the vertical load evenly to avoid uneven distribution of stress.

  The lower diagonal beam may have a slope of 17/100 or more and 30/100 or less. If the slope of the lower slope is less than 17/100, there is a possibility that the lower slope is lifted by the influence of wind and the inclined tensile material is compressed. In addition, when the lower slope crosses the slope of 30/100, the roof of a large span building becomes excessively high, and the aesthetics are greatly reduced. The upper diagonal beam should have a gradient of 3/100 or more and 10/100 or less. If the upper slope is less than 3/100 slope, drainage of rainwater by natural running water will not be possible. Further, when the upper slope exceeds the 10/100 slope, the difference from the slope of the lower slope becomes small, and the effect of the present invention (improvement of the structural strength of the building) is not sufficiently exhibited.

  The pentagonal rigid frame structure of the present invention improves the structural strength of the building, so that it is possible to suppress the specifications of the members to be used, and it can also be used for buildings with a large span (80 m or more) where the standards of the members tend to be large. Thus, regardless of the size of the span, the design can be performed with the same structure, and the design cost can be reduced. Further, since the specification of the members is suppressed, the material cost and the construction cost can be naturally reduced, and the reduction effect is particularly large in a large span.

  When the horizontal length of each of the lower and upper diagonal beams is 1/4 span, uneven distribution of stress can be avoided, and the effect of the present invention (improvement of structural strength of the building) is more effectively exhibited. 17/100 slope or more, 30/100 slope or less lower slope, and 3/100 slope or more, when used in combination with the upper slope which is 10/100 or less, while enjoying the effects of the present invention, the wind It is possible to provide a practical building with excellent aesthetics by avoiding compression of the inclined tensile material due to the influence, suppressing or preventing a decrease in structural strength due to a smaller gradient difference, and securing drainage of rainwater. it can.

It is a front view showing an example of the pentagonal rigid frame structure of the present invention in which the lower oblique beam has a 30/100 gradient and the upper oblique beam has a 10/100 gradient. It is a schematic diagram of the frame which comprises the ramen structure of this example. It is a front view showing another example of the pentagonal rigid frame structure of the present invention in which the lower oblique beam has a 17/100 gradient and the upper oblique beam has a 3/100 gradient. It is a schematic diagram of the frame which comprises the ramen structure of another example. It is a schematic diagram of the frame which comprises the comparative example of the mountain-shaped rigid-frame-structure of the invention of patent document 1 which made the slope a 15/100 slope. It is a schematic diagram of the frame which comprises the comparative example of the mountain-shaped ramen structure of the invention of patent document 2 which made the inclined beam 15/100 slope.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. As shown in FIG. 1, the pentagonal rigid frame structure 1 of the present invention has a relatively high gradient lower slope 14 and a relatively lower gradient from the capital of a column 11 erected at a fixed distance span. Extend the diagonal beams 15 in the stated order and abut the upper diagonal beams 15 at the apex of the center of the span, and install the inclined tensile material 12 between the lower end and the capital of the compressed material 13 hanging down from the apex. It is composed.

  In the pentagonal rigid frame structure 1 of this example, the strut 11, the lower oblique beam 14 and the upper oblique beam 15 are H-shaped ropes of the same standard, the compressed material 13 is a round pipe, and the inclined tensile material 12 is an angle material. As can be seen, the strut 11, the lower oblique beam 14 and the upper oblique beam 15 are rigidly joined, the inclined tension members 12 are rigidly joined to each other, the inclined tension members 12 for the capital are pin joints, and the compression members for the top and inclined tension members 12 are connected. 13 is a pin connection. In the pentagonal rigid frame structure 1 of this example, the slope of the lower oblique beam 14 is 30/100, the slope of the upper oblique beam 15 is 10/100, and the lower oblique beam 14 and the upper oblique beam 15 have the same horizontal width of 1/4 span. Length.

  Here, as another example of the pentagonal rigid frame structure 1 in which the slope of the lower oblique beam 14 is 17/100 and the slope of the upper oblique beam 15 is 3/100, as shown in FIG. . In the pentagonal rigid frame structure 1 of another example 1, the lower and upper oblique beams 14 and 15 have the same horizontal length of 1/4 span. The pentagonal rigid frame structure 1 of this example (FIG. 1) and another example (FIG. 3) have the same span and the ceiling height (the distance from the lower end of the compressed material 13 to the ground across the margin height) of the support 11. ing. As described above, in the pentagonal rigid frame structure 1 of the present invention, the combination of the slopes of the lower oblique beam 14 and the upper oblique beam 15 does not affect the ceiling height.

  In another example of the pentagonal rigid frame structure 1, the strut 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped ropes of the same standard, the compressed material 13 is a round pipe, and the inclined tensile material 12 is an angle material. As can be seen, the support 11, the lower oblique beam 14 and the upper oblique beam 15 are rigidly connected, the inclined tensile members 12 are rigidly connected to each other, the inclined tensile members 12 for the capital are pin joints, and the compressed members 13 for the top and inclined tensile members 12 Is a pin connection. In the pentagonal rigid frame structure 1 of another example, the effect of the present invention is slightly lower than that of the present example, and the specification of the H-shaped rope, round pipe or angle material to be used is further increased.

  The pentagonal rigid frame structure 1 of this example is compared with the mountain-shaped rigid frame structure 2 described in Patent Document 1 or Patent Document 2. As shown in FIG. 5, in the mountain-shaped ramen structure 2 described in Patent Literature 1, a diagonal beam 24 is extended from the capital of a column 21 erected at a span of a fixed distance, butted at a vertex at the center of the span, and hangs down from the vertex. The inclined tension member 22 is provided between the lower end of the compression member 23 at a position lower than the capital and a point on the diagonal beam 24 separated by L from the capital to the vertex. The strut 21 and the inclined beam 24 are rigidly joined, the inclined tensile members 22 are rigidly joined to each other, the inclined tensile member 22 for the inclined beam is a pin joint, and the compressed material 23 for the vertex and the inclined tensile member 22 is a pin joint.

  As shown in FIG. 6, in a mountain-shaped ramen structure 3 described in Patent Document 2, a diagonal bridge 34 is extended from a capital of a support 31 erected at a span of a fixed distance, and butted at a vertex at the center of the span. A brace 35 is erected at a point on the lowered strut 31 and a point on the diagonal beam 34 that is separated by ΔS horizontally from each of the capitals toward the vertex, and at a position lower than the capital of the compressed material 33 hanging from the vertex. The inclined tension member 32 is provided at a certain lower end and a point on the diagonal beam 34 where the brace 35 is provided. The strut 31 and the inclined beam 34 are rigidly joined, the inclined tensile members 32 are rigidly joined to each other, the brace 35 for the column 31 and the inclined beam 34 is pin-joined, the inclined tensile member 32 for the oblique beam is pin-joined, The compression member 33 with respect to 32 is a pin joint.

  A pentagonal rigid frame structure 1 (according to Example 1, FIGS. 1 and 2) of the present invention in a span of 40 m is compared with a mountain-shaped rigid frame structure 2 described in Patent Document 1 (comparative example 1, conforming to FIG. 5). As Reference Example 1, a normal Yamagata ramen structure is also given. In Example 1 and Comparative Example 1, the lower ends of the compressed members 13 and 23 descend 1 m below the capital, and the ceiling height is set to 10 m with a margin of 30 cm therebetween. In Reference Example 1, the height up to the capital is set to a ceiling height of 10 m. In the first embodiment, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 1 and Reference Example 1, the slope 14 has a 15/100 gradient.

  Total weight of one frame (excluding gusset plates, bolts and nuts) and maximum stress with a maximum stress of less than 1 when a vertical load of 7.5 kN / m is applied to Example 1, Comparative Example 1 and Reference Example 1 with a span of 40 m The degrees are shown in Table 1. In Example 1, the support 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped ropes of 350 × 175 × 7 × 11, the inclined tensile material 12 is an angle material of 75 × 75 × 9, and the compressed material 13 is φ101. 6 × 3.5 round pipe. Comparative Example 1 is an H-shaped rope of 400 × 200 × 8 × 13 in which the support 21 and the diagonal beam 24 are used, a round pipe of φ165.2 × 4.5 for the inclined tensile member 22, and a circular pipe of φ101.6 × 3.5 for the compression member 23. And L is 0.5 m. Reference Example 1 is a configuration in which the inclined tension member 22 and the compression member 23 are removed from Comparative Example 1 (see FIG. 5), and is a 588 × 300 × 8 × 13 H-shaped rope with columns and diagonal beams.

  While the total weight of Example 1 was 3.970 t (weight ratio = 100%) and the maximum stress was 0.60, the total weight of Comparative Example 1 was 4.848 t (weight ratio = 122%) and the maximum stress was The total weight of Reference Example 1 was 9.278 t (weight ratio = 233%), and the maximum stress was 0.70. In Example 1, the maximum stress was suppressed to be the lowest while the total weight was slightly reduced by 20% compared to Comparative Example 1 which is half of Reference Example 1. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  The pentagonal rigid frame structure 1 of the present invention (based on Example 2-1 and FIGS. 1 and 2) at a span of 60 m is compared with the mountain-shaped rigid frame structure 2 described in Patent Document 1 (Comparative Example 2 and FIG. 5). . As Reference Example 2, a normal Yamagata ramen structure is also given. In Example 2-1 and Comparative Example 2, the lower ends of the compression members 13 and 23 descend 2 m below the capital, and the ceiling height is set to 10 m with a margin of 30 cm therebetween. In Reference Example 2, the height up to the capital is a ceiling height of 10 m. In Example 2-1, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 2 and Reference Example 1, the slope 14 has a 15/100 gradient.

  The total weight of one frame (excluding gusset plates, bolts and nuts) where the maximum stress is less than 1 when a vertical load of 7.5 kN / m is applied to Example 2-1 and Comparative Example 2 and Reference Example 2 having a span of 60 m. Table 2 shows the maximum stress degree. In Example 2-1, the support 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped ropes of 450 × 200 × 9 × 14, the inclined tensile material 12 is an angle material of 90 × 90 × 10, and the compressed material 13 is φ114.3 × 4.5 round pipe. In Comparative Example 2, the strut 21 and the inclined beam 24 were H-shaped ropes of 488 × 300 × 11 × 18, the inclined tensile member 22 was a round pipe of φ190.7 × 5.3, and the compression member 23 was a round pipe of φ114.3 × 4.5. And L is 0.5 m. Reference Example 2 has a configuration in which the inclined tensile member 22 and the compressive member 23 are removed from Comparative Example 2 (see FIG. 5), and is a H-type rope having 800 × 300 × 14 × 26 columns and diagonal beams.

  While the total weight of Example 2-1 was 7.328 t (weight ratio = 100%) and the maximum stress was 0.70, the total weight of Comparative Example 2 was 12.168 t (weight ratio = 166%) and the maximum stress The degree was 0.80, the total weight of Reference Example 1 was 22.281 t (weight ratio = 304%), and the maximum stress degree was 0.79. In Example 2-1, the maximum stress was suppressed to be the lowest, although the total weight was about 60% smaller than that of Comparative Example 2 as compared with Reference Example 2 as much as 1/3. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  Here, at a span of 60 m, the pentagonal rigid frame structure 1 of the present invention in which the lower oblique beam 14 has a 17/100 gradient and the upper oblique beam 15 has a 3/100 gradient (according to Examples 2-2, 3 and 4). ) Is compared with Comparative Example 2 and Reference Example 2. The embodiment 2-2 is different from the embodiment 2-1 in that the lower oblique beam 14 and the upper oblique beam 15 have different slopes. The total weight of one frame (excluding gusset plates, bolts, and nuts) where the maximum stress is less than 1 when a vertical load of 7.5 kN / m is applied to Example 2-2, Comparative Example 2, and Reference Example 2 having a span of 60 m. Table 3 shows the maximum stress degree. In Example 2-2, the strut 11, the lower sloping beam 14, and the upper sloping beam 15 (the sloping beam in Table 1) are 600 × 200 × 11 × 17 H-shaped ropes, and the inclined tensile material 12 is 100 × 100 The × 13 angle material and the compression material 13 are φ114.3 × 4.5 round pipes.

  While the total weight of Example 2-2 was 9.642 t (weight ratio = 100%) and the maximum stress was 0.97, the total weight of Comparative Example 1 was 12.168 t (weight ratio = 126%) and the maximum stress The degree was 0.80, the total weight of Reference Example 1 was 22.281 t (weight ratio = 231%), and the maximum stress degree was 0.80. In Example 2-2, the height of the roof can be reduced, but members of two standards higher than those in Example 2-1 are required. Nevertheless, while the total weight of Example 2-2 is less than 1/2 of that of Reference Example 2 and less than 30% of that of Comparative Example 2, the maximum stress is within the allowable range (maximum 1.0). I have. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  The pentagonal rigid frame structure 1 (according to Example 3, FIGS. 1 and 2) of the present invention and a mountain-shaped rigid frame structure 2 described in Patent Document 2 (comparative example 3, conforming to FIG. 6) at a span of 80 m are compared. As Reference Example 3, a normal Yamagata ramen structure is also given. In Example 3 and Comparative Example 3, the lower ends of the compressed members 13 and 23 descended 3 m below the capital, and the ceiling height was set to 10 m with a margin of 50 cm. In Reference Example 3, the height up to the capital is 10 m in ceiling height. In the third embodiment, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 3 and Reference Example 3, the slope 14 has a 15/100 gradient.

  The total weight of one frame (excluding gusset plates, bolts and nuts) and the maximum stress level where the maximum stress level is less than 1 when a vertical load of 10 kN / m is applied to Example 3, Comparative Example 3 and Reference Example 3 with a span of 80 m. Are shown in Table 4. In Example 3, the support 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped ropes of 488 × 300 × 11 × 18, the inclined tensile material 12 is an angle material of 130 × 130 × 12, and the compressed material 13 is φ165. 5 × 5.5 round pipe. Comparative Example 3 is a truss structure in which the support 31 and the diagonal beams 34 are h = 200 cm, the upper and lower chord members are 250 × 250 × 9 × 14 H-shaped ropes, and the lattices are 150 × 150 × 7 × 10 H-shaped ropes. The inclined tension member 32 is a round pipe of φ190.7 × 5.3, the compression member 33 is a round pipe of φ114.3 × 4.5, and the brace 35 is a round pipe of φ267.4 × 8. I have. Reference Example 3 has a configuration in which the inclined tension member 32, the compression member 33, and the brace 35 are removed from Comparative Example 3 (see FIG. 6). The strut and the diagonal beam have a truss structure of h = 300 cm. It is an H-shaped class of × 250 × 9 × 14 and a lattice of 175 × 175 × 7.5 × 11.

  While the total weight of Example 3 was 13.229 t (weight ratio = 100%) and the maximum stress was 0.86, the total weight of Comparative Example 3 was 21.336 t (weight ratio = 161%) and the maximum stress was Was 0.53, the total weight of Reference Example 1 was 19.921 t (weight ratio = 151%), and the maximum stress was 0.66. In Example 3, although the maximum stress degree was inferior to Comparative Example 2 and Reference Example 2, it was still within the allowable range, and the total weight of one frame was reduced by 50% to 60% of Comparative Example 2 and Reference Example 2. It has become. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  The pentagonal rigid frame structure 1 (according to Example 4, FIGS. 1 and 2) of the present invention in a span of 100 m is compared with the mountain-shaped rigid frame structure 2 described in Patent Document 2 (comparative example 4, conforming to FIG. 6). As Reference Example 4, an ordinary Yamagata ramen structure is also given. In Example 4 and Comparative Example 4, the lower ends of the compression members 13 and 23 descend 4 m below the capital, and the ceiling height is set to 10 m with a margin of 50 cm therebetween. In Reference Example 3, the height up to the capital is 10 m in ceiling height. In the fourth embodiment, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 4 and Reference Example 4, the slope 14 has a 15/100 gradient.

  The total weight of one frame (excluding gusset plates, bolts and nuts) and the maximum stress when the maximum stress is less than 1 when a vertical load of 10 kN / m is applied to Example 4, Comparative 4 and Reference 4 with a span of 100 m Are shown in Table 5. In Example 4, the support 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped ropes of 700 × 300 × 12 × 28, the inclined tensile material 12 is an angle material of 130 × 130 × 12, and the compressed material 13 is φ216. It is a 3 × 5.8 round pipe. Comparative Example 4 is a truss structure in which the support 31 and the diagonal beams 34 are h = 300 cm, the upper and lower chord members are H-shaped ropes of 300 × 300 × 10 × 15, and the lattice of the support 21 is 200 × 200 × 8 × 12 H. H-shaped rope with a lattice of 150 × 150 × 7 × 10, a circular pipe of φ216.3 × 8.2 with inclined tensile material 32, a circular pipe of φ190.7 × 7 with compressed material 33 A round pipe 35 of φ318.5 × 9 has ΔS of 10 m and ΔH of 5 m. Reference Example 4 has a configuration in which the inclined tension member 32, the compression member 33, and the brace 35 are removed from Comparative Example 4 (see FIG. 6). The H-type rope of × 300 × 10 × 15, the lattice of the pillar is H-type of 200 × 200 × 8 × 12, and the lattice of the diagonal beam is the H-type of lattice of 175 × 175 × 7.5,5 × 11.

  While the total weight of Example 4 was 28.569 t (weight ratio = 100%) and the maximum stress was 0.75, the total weight of Comparative Example 2 was 40.109 t (weight ratio = 140%) and the maximum stress was The total weight of Reference Example 1 was 34.219 t (weight ratio = 120%), and the maximum stress was 0.72. Example 4 has a higher maximum stress than Comparative Example 4, but is equivalent to Reference Example 4. The total weight of one frame is reduced by 40% with respect to Comparative Example 2, and 20% with respect to Reference Example 4. It is kept low and low. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  The pentagonal rigid frame structure 1 of the present invention (based on Example 5, FIG. 1 and FIG. 2) at a span of 120 m is compared with the mountain-shaped rigid frame structure 2 described in Patent Document 2 (Comparative Example 5, based on FIG. 6). As Reference Example 5, a normal Yamagata ramen structure is also given. In Example 5 and Comparative Example 5, the lower ends of the compressed members 13 and 23 descend 5 m below the capital, and the ceiling height is set to 10 m with a margin of 50 cm therebetween. In Reference Example 5, the height up to the capital is set to a ceiling height of 10 m. In the fifth embodiment, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 5 and Reference Example 5, the slope 14 has a 15/100 gradient.

  Total weight of one frame (excluding gusset plates, bolts and nuts) and maximum stress when the maximum stress is less than 1 when a vertical load of 10 kN / m is applied to Example 5, Comparative 5 and Reference 5 with a span of 120 m. Are shown in Table 6. In Example 5, the strut 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped ropes of 800 × 300 × 14 × 26, the inclined tensile material 12 is an angle material of 150 × 150 × 12, and the compressed material 13 is φ267. It is a 4 × 6.6 round pipe. Comparative Example 5 is a truss structure in which the support 31 and the diagonal beams 34 are h = 300 cm, the upper and lower chords are 350 × 350 × 12 × 19 H-shaped ropes, and the support 31 is 200 × 200 × 8 × 12 H lattice. H-shaped rope with 175 x 175 x 7.5,5 x 11 lattices, diagonal tension member 32 with φ216.3 x 8.2 round pipe, compression material 33 with φ190.7 x 7 round pipe, The brace 35 is a φ355.6 × 12 round pipe with ΔS of 12 m and ΔH of 5 m. Reference Example 5 has a configuration in which the inclined tension member 32, the compression member 33, and the brace 35 are removed from Comparative Example 5 (see FIG. 6). The strut and the diagonal beam have a truss structure of h = 300 cm. It is an H-shaped rope of × 350 × 12 × 19, a lattice of pillars is 200 × 200 × 8 × 12, and a lattice of diagonal beams is 175 × 175 × 7,5 × 11.

  While the total weight of Example 5 was 35.869 t (weight ratio = 100%) and the maximum stress was 0.74, the total weight of Comparative Example 2 was 56.124 t (weight ratio = 156%) and the maximum stress was The total weight of Reference Example 1 was 54.972 t (weight ratio = 153%), and the maximum stress was 0.67. Example 5 has the same maximum stress as Comparative Example 5, but is equivalent to Reference example 5. The total weight of one frame is as low as 60% less than Comparative example 5 and Reference example 5. It is suppressed. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

1 Pentagonal ramen structure
11 props
12 Inclined tensile material
13 Compressed material
14 Lower beam
15 Upper Oblique Beam 2 Yamagata Ramen Structure
21 props
22 Inclined tensile material
23 Compressed material
24 Oblique Beam 3 Yamagata Ramen Structure
31 props
32 Inclined tensile material
33 Compressed material
34 Beam
35 cane

As a result of the examination, the thing developed as a result of extending the lower slope beam with a relatively high slope and the upper slope beam with a relatively low slope from the capital of a column erected at a span This is a pentagonal rigid frame structure in which beams are abutted at the top of the center of the span, and an inclined tensile member is erected between the lower end of the compressed material hanging down from the top and the lower end of the lower part of the capital and the capital. It referred to herein, a "bridged inclined tension members between the lower end and capitals in a position lower than the stigma of struts" also designed to the left and right inclined diagonal tension member as was laid substantially horizontally, vertically oblique by the weight of the beams, since the lower end of the compression member is at a position lower than the stigma during construction, such design is also included in the present invention. Although the members used for each part are not limited, a configuration using an H-shaped rope for the column, the lower oblique beam and the upper oblique beam, a round pipe for the compression material, and a round pipe or an angle material for the inclined tension material can be exemplified.

  The present invention relates to a pentagonal ramen structure having a pentagonal roof.

The rigid frame structure that rigidly connects the column and the beam is used to construct a column or a beam that can withstand the stress generated by the vertical load when the spacing between the columns (axial line distance = span) is to be increased as it is. It is necessary to increase the standard of the steel material (mainly H-shaped steel ) to be used, and the material cost is increased as a whole, so that a building with a large span cannot be constructed practically. Then, in order to construct a building with a large span, a mountain-shaped ramen structure has been proposed in which a compression material is added to push up a mountain-shaped roof formed by a diagonal beam (Patent Documents 1 and 2).

  Patent Document 1 discloses a mountain-shaped roof formed by abutting sloping beams extending from a capital of a support column, a compressed material lower end hanging from a vertex where the sloping beams are abutted, and a sloping beam having a fixed distance from the capital or the capital to the apex. Disclosed is a mountain-shaped frame structure in which an inclined tensile member is installed between the upper point and the upper point (Patent Document 1 [Claim 1]). When installing the inclined tensile member, an inward pretension may be hung on the capital (Patent Document 1 [Claim 5]). This makes it possible to withstand the stress generated by the vertical load even if the standard of the steel material used is reduced, reducing the material cost and construction cost (up to about 15%, up to about 30% with pretension) (Patent Document 1 [0039]).

  Patent Literature 2 configures a mountain-shaped roof by abutting a diagonal beam extending from a capital of a column, erection a bridge at a point on a column and a point on a diagonal beam, and suspends from a vertex at which the diagonal beam is abutted. Disclosed is a mountain-shaped rigid frame structure in which an inclined tensile member is installed between a lower end of a compression member and a point on the diagonal bridge on which the brace is installed or a point on the diagonal bridge from the point to the vertex (Patent Document 2). [Claim 1]). One or both of the columns and the diagonal beams are preferably truss structural materials (Patent Document 2 [Claim 4]). As a result, it is possible to reduce the material cost and the construction cost while increasing the rigidity of the columns and the diagonal beams and widening the span to 120 m (Patent Document 2, [0010]).

JP 08-189081 A JP 2014-139372 Gazette

Although the mountain-shaped ramen structure disclosed in Patent Document 1 can be used for a building having a span of less than 80 m, it is difficult to use it for a building having a large span of more than that because the specifications of the diagonal beams and columns are too large. For this reason, a building having a span of 80 m or more uses a mountain-shaped ramen structure disclosed in Patent Document 2. Yamagata rigid frame structure Patent Document 2 disclose, in order to counteract the stresses due to vertical load, where there is need to use a build H-section steel as a nonstandard instead of high material cost and construction cost build H-type steel We propose the use of truss-structured beams and columns. However, truss-structured diagonal beams and columns also require material costs and construction costs. Thus, there is still room for reducing material costs and construction costs in large span buildings.

  Further, although the Yamagata ramen structure disclosed in Patent Document 2 can be used for a building with a span of less than 80 m, the performance is excessive, and the material cost and the construction cost are higher than the Yamagata ramen structure disclosed in Patent Document 1. . From now on, the angle-shaped ramen structure disclosed in Patent Document 1 and the angle-shaped ramen structure disclosed in Patent Document 2 will be selectively used according to the span. However, it is not practical to properly use the ramen structure according to the span because it is difficult to set the span as the boundary. Therefore, a ramen structure that can be used regardless of the size of the span and that further reduces material costs and construction costs with a large span (80 m or more) was studied.

As a result of the examination, the distance between the columns was described as the lower slope beam with a relatively high slope and the upper slope beam with a relatively low slope from the capital of a pillar erected with a span of 40 m to 120 m. the upper Hasuhari by extending the order is match-at the apex of the midspan, the roof is composed of pentagonal, erection inclined tension members between the lower end and capitals in a position lower than the stigma of struts depending from its apex This is a pentagonal rigid frame structure in which a support and a beam are rigidly joined . Although the members used for each part are not limited, a configuration using an H-shaped steel for the column, the lower inclined beam and the upper inclined beam, a round pipe for the compression member, and a round pipe or an angle member for the inclined tension member can be exemplified.

  The pentagonal rigid frame structure according to the invention is, as in the invention described in Patent Document 1 or Patent Document 2, in which the inclined tensile material subjected to the stress of the lower and upper diagonal beams due to the vertical load lifts the compressed material and reduces the stress in the opposite direction. The stresses generated in the lower and upper sloping beams cancel each other out and improve the structural strength of the building. In the pentagonal rigid frame structure of the present invention, the lower oblique beam and the upper oblique beam as a whole are upwardly projecting oblique beams, reducing the stress generated in the oblique beams against vertical loads, further improving the structural strength of the building. Let it. Further, the distance between the lower and upper oblique beams and the inclined tensile member is larger than the distance between the inclined beam and the inclined tensile member described in Patent Document 1 or Patent Document 2, and the action of the inclined tensile member (stress Offset) to further enhance the structural strength of the building.

  The capital is the intersection of the axis of the column and the axis of the lower oblique beam. The vertices are the intersections of the axes of the upper oblique beams that form a pair. The inclined tensile member is erected by connecting the lower end of the compressed material and the capital by an axis. "Relatively high slope lower slope" and "relatively lower slope upper slope" mean that the slope of the lower slope is greater than the slope of the upper slope when comparing the respective slopes I do. As a result, the oblique beam formed by the lower oblique beam and the upper oblique beam always protrudes upward.

  The lower oblique beam and the upper oblique beam may have different lengths, and it is preferable that the horizontal length of each of the lower oblique beam and the upper oblique beam is / span from the viewpoint of being viewed as an integral oblique beam as a whole. The horizontal length is the horizontal length of the axis. The material length (length of the axis) of the lower and upper diagonal beams is slightly higher than that of the lower and upper diagonal beams, even if the horizontal length is the same. Longer (differences of less than several tens of centimeters with a span of 60m). However, the lower oblique beam and the upper oblique beam having the same horizontal length receive the vertical load evenly to avoid uneven distribution of stress.

  The lower diagonal beam may have a slope of 17/100 or more and 30/100 or less. If the slope of the lower slope is less than 17/100, there is a possibility that the lower slope is lifted by the influence of wind and the inclined tensile material is compressed. In addition, when the lower slope crosses the slope of 30/100, the roof of a large span building becomes excessively high, and the aesthetics are greatly reduced. The upper diagonal beam should have a gradient of 3/100 or more and 10/100 or less. If the upper slope is less than 3/100 slope, drainage of rainwater by natural running water will not be possible. Further, when the upper slope exceeds the 10/100 slope, the difference from the slope of the lower slope becomes small, and the effect of the present invention (improvement of the structural strength of the building) is not sufficiently exhibited.

  The pentagonal rigid frame structure of the present invention improves the structural strength of the building, so that it is possible to suppress the specifications of the members to be used, and it can also be used for buildings with a large span (80 m or more) where the standards of the members tend to be large. Thus, regardless of the size of the span, the design can be performed with the same structure, and the design cost can be reduced. In addition, since the specification of the members is suppressed, the material cost and the construction cost can be naturally reduced.

  When the horizontal length of each of the lower and upper diagonal beams is 1/4 span, uneven distribution of stress can be avoided, and the effect of the present invention (improvement of structural strength of the building) is more effectively exhibited. 17/100 slope or more, 30/100 slope or less lower slope, and 3/100 slope or more, when used in combination with the upper slope which is 10/100 or less, while enjoying the effects of the present invention, the wind It is possible to provide a practical building with excellent aesthetics by avoiding compression of the inclined tensile material due to the influence, suppressing or preventing a decrease in structural strength due to a smaller gradient difference, and securing drainage of rainwater. it can.

It is a front view showing an example of the pentagonal rigid frame structure of the present invention in which the lower oblique beam has a 30/100 gradient and the upper oblique beam has a 10/100 gradient. It is a schematic diagram of the frame which comprises the ramen structure of this example. It is a front view showing another example of the pentagonal rigid frame structure of the present invention in which the lower oblique beam has a 17/100 gradient and the upper oblique beam has a 3/100 gradient. It is a schematic diagram of the frame which comprises the ramen structure of another example. It is a schematic diagram of the frame which comprises the comparative example of the mountain-shaped rigid-frame-structure of the invention of patent document 1 which made the slope a 15/100 slope. It is a schematic diagram of the frame which comprises the comparative example of the mountain-shaped ramen structure of the invention of patent document 2 which made the inclined beam 15/100 slope.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. As shown in FIG. 1, the pentagonal rigid frame structure 1 of the present invention has a relatively high gradient lower slope 14 and a relatively lower gradient from the capital of a column 11 erected at a fixed distance span. Extend the diagonal beams 15 in the stated order and abut the upper diagonal beams 15 at the apex of the center of the span, and install the inclined tensile material 12 between the lower end and the capital of the compressed material 13 hanging down from the apex. It is composed.

In the pentagonal rigid frame structure 1 of this example, the strut 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped steel of the same standard, the compressed material 13 is a round pipe, and the inclined tensile material 12 is an angle material. As can be seen, the strut 11, the lower oblique beam 14 and the upper oblique beam 15 are rigidly joined, the inclined tension members 12 are rigidly joined to each other, the inclined tension members 12 for the capital are pin joints, and the compression members for the top and inclined tension members 12 are connected. 13 is a pin connection. In the pentagonal rigid frame structure 1 of this example, the slope of the lower oblique beam 14 is 30/100, the slope of the upper oblique beam 15 is 10/100, and the lower oblique beam 14 and the upper oblique beam 15 have the same horizontal width of 1/4 span. Length.

  Here, as another example of the pentagonal rigid frame structure 1 in which the slope of the lower oblique beam 14 is 17/100 and the slope of the upper oblique beam 15 is 3/100, as shown in FIG. . In the pentagonal rigid frame structure 1 of another example 1, the lower and upper oblique beams 14 and 15 have the same horizontal length of 1/4 span. The pentagonal rigid frame structure 1 of this example (FIG. 1) and another example (FIG. 3) have the same span and the ceiling height (the distance from the lower end of the compressed material 13 to the ground across the margin height) of the support 11. ing. As described above, in the pentagonal rigid frame structure 1 of the present invention, the combination of the slopes of the lower oblique beam 14 and the upper oblique beam 15 does not affect the ceiling height.

In the pentagonal rigid frame structure 1 of another example, the strut 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped steel of the same standard, the compressed material 13 is a round pipe, and the inclined tensile material 12 is an angle material. As can be seen, the support 11, the lower oblique beam 14 and the upper oblique beam 15 are rigidly connected, the inclined tensile members 12 are rigidly connected to each other, the inclined tensile members 12 for the capital are pin joints, and the compressed members 13 for the apex and inclined tensile members 12 are provided. Is a pin connection. In the pentagonal rigid frame structure 1 of another example, the effect of the present invention is slightly lower than that of the present example, and the specification of the H-shaped steel , round pipe or angle material to be used is further increased.

  The pentagonal rigid frame structure 1 of this example is compared with the mountain-shaped rigid frame structure 2 described in Patent Document 1 or Patent Document 2. As shown in FIG. 5, in the mountain-shaped ramen structure 2 described in Patent Literature 1, a diagonal beam 24 is extended from the capital of a column 21 erected at a span of a fixed distance, butted at a vertex at the center of the span, and hangs down from the vertex. The inclined tension member 22 is provided between the lower end of the compression member 23 at a position lower than the capital and a point on the diagonal beam 24 separated by L from the capital to the vertex. The strut 21 and the inclined beam 24 are rigidly joined, the inclined tensile members 22 are rigidly joined to each other, the inclined tensile member 22 for the inclined beam is a pin joint, and the compressed material 23 for the vertex and the inclined tensile member 22 is a pin joint.

  As shown in FIG. 6, in a mountain-shaped ramen structure 3 described in Patent Document 2, a diagonal bridge 34 is extended from a capital of a support 31 erected at a span of a fixed distance, and butted at a vertex at the center of the span. A brace 35 is erected at a point on the lowered strut 31 and a point on the diagonal beam 34 that is separated by ΔS horizontally from each of the capitals toward the vertex, and at a position lower than the capital of the compressed material 33 hanging from the vertex. The inclined tension member 32 is provided at a certain lower end and a point on the diagonal beam 34 where the brace 35 is provided. The strut 31 and the inclined beam 34 are rigidly joined, the inclined tensile members 32 are rigidly joined to each other, the brace 35 for the column 31 and the inclined beam 34 is pin-joined, the inclined tensile member 32 for the oblique beam is pin-joined, The compression member 33 with respect to 32 is a pin joint.

  A pentagonal rigid frame structure 1 (according to Example 1, FIGS. 1 and 2) of the present invention in a span of 40 m is compared with a mountain-shaped rigid frame structure 2 described in Patent Document 1 (comparative example 1, conforming to FIG. 5). As Reference Example 1, a normal Yamagata ramen structure is also given. In Example 1 and Comparative Example 1, the lower ends of the compressed members 13 and 23 descend 1 m below the capital, and the ceiling height is set to 10 m with a margin of 30 cm therebetween. In Reference Example 1, the height up to the capital is set to a ceiling height of 10 m. In the first embodiment, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 1 and Reference Example 1, the slope 14 has a 15/100 gradient.

Total weight of one frame (excluding gusset plates, bolts and nuts) and maximum stress with a maximum stress of less than 1 when a vertical load of 7.5 kN / m is applied to Example 1, Comparative Example 1 and Reference Example 1 with a span of 40 m The degrees are shown in Table 1. In Example 1, the strut 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped steel of 350 × 175 × 7 × 11, the inclined tensile material 12 is an angle material of 75 × 75 × 9, and the compressed material 13 is φ101. 6 × 3.5 round pipe. In Comparative Example 1, the support 21 and the inclined beam 24 were H-shaped steel of 400 × 200 × 8 × 13, the inclined tensile member 22 was a round pipe of φ165.2 × 4.5, and the compressed material 23 was a round pipe of φ101.6 × 3.5. And L is 0.5 m. Reference Example 1 has a configuration in which the inclined tension member 22 and the compression member 23 are removed from Comparative Example 1 (see FIG. 5), and is a 588 × 300 × 8 × 13 H-shaped steel with columns and diagonal beams.

  While the total weight of Example 1 was 3.970 t (weight ratio = 100%) and the maximum stress was 0.60, the total weight of Comparative Example 1 was 4.848 t (weight ratio = 122%) and the maximum stress was The total weight of Reference Example 1 was 9.278 t (weight ratio = 233%), and the maximum stress was 0.70. In Example 1, the maximum stress was suppressed to be the lowest while the total weight was slightly reduced by 20% compared to Comparative Example 1 which is half of Reference Example 1. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  The pentagonal rigid frame structure 1 of the present invention (based on Example 2-1 and FIGS. 1 and 2) at a span of 60 m is compared with the mountain-shaped rigid frame structure 2 described in Patent Document 1 (Comparative Example 2 and FIG. 5). . As Reference Example 2, a normal Yamagata ramen structure is also given. In Example 2-1 and Comparative Example 2, the lower ends of the compression members 13 and 23 descend 2 m below the capital, and the ceiling height is set to 10 m with a margin of 30 cm therebetween. In Reference Example 2, the height up to the capital is a ceiling height of 10 m. In Example 2-1, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 2 and Reference Example 1, the slope 14 has a 15/100 gradient.

The total weight of one frame (excluding gusset plates, bolts and nuts) where the maximum stress is less than 1 when a vertical load of 7.5 kN / m is applied to Example 2-1 and Comparative Example 2 and Reference Example 2 having a span of 60 m. Table 2 shows the maximum stress degree. In Example 2-1, the support 11, the lower oblique beam 14, and the upper oblique beam 15 are H-section steel of 450 × 200 × 9 × 14, the inclined tensile material 12 is an angle material of 90 × 90 × 10, and the compressive material 13 is φ114.3 × 4.5 round pipe. In Comparative Example 2, the strut 21 and the inclined beam 24 were H-shaped steel of 488 × 300 × 11 × 18, the inclined tensile member 22 was a round pipe of φ190.7 × 5.3, and the compressed material 23 was a round pipe of φ114.3 × 4.5. And L is 0.5 m. Reference Example 2 has a configuration in which the inclined tension member 22 and the compression member 23 are removed from Comparative Example 2 (see FIG. 5), and the columns and the inclined beams are 800 × 300 × 14 × 26 H-shaped steel .

  While the total weight of Example 2-1 was 7.328 t (weight ratio = 100%) and the maximum stress was 0.70, the total weight of Comparative Example 2 was 12.168 t (weight ratio = 166%) and the maximum stress The degree was 0.80, the total weight of Reference Example 1 was 22.281 t (weight ratio = 304%), and the maximum stress degree was 0.79. In Example 2-1, the maximum stress was suppressed to be the lowest, although the total weight was about 60% smaller than that of Comparative Example 2 as compared with Reference Example 2 as much as 1/3. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

Here, at a span of 60 m, the pentagonal rigid frame structure 1 of the present invention in which the lower oblique beam 14 has a 17/100 gradient and the upper oblique beam 15 has a 3/100 gradient (according to Examples 2-2, 3 and 4). ) Is compared with Comparative Example 2 and Reference Example 2. In the embodiment 2-2, the slopes of the lower oblique beam 14 and the upper oblique beam 15 are different, and the setting is the same as that of the embodiment 2-1. The total weight of one frame (excluding gusset plates, bolts, and nuts) where the maximum stress is less than 1 when a vertical load of 7.5 kN / m is applied to Example 2-2, Comparative Example 2, and Reference Example 2 having a span of 60 m. Table 3 shows the maximum stress degree. In Example 2-2, the strut 11, the lower sloping beam 14, and the upper sloping beam 15 (the sloping beam in Table 1) were 600 × 200 × 11 × 17 H-shaped steel , and the inclined tensile material 12 was 100 × 100. A × 13 angle material and a compressed material 13 are φ114.3 × 4.5 round pipes.

  While the total weight of Example 2-2 was 9.642 t (weight ratio = 100%) and the maximum stress was 0.97, the total weight of Comparative Example 1 was 12.168 t (weight ratio = 126%) and the maximum stress The degree was 0.80, the total weight of Reference Example 1 was 22.281 t (weight ratio = 231%), and the maximum stress degree was 0.80. In Example 2-2, the height of the roof can be reduced, but members of two standards higher than those in Example 2-1 are required. Nevertheless, while the total weight of Example 2-2 is less than 1/2 of that of Reference Example 2 and less than 30% of that of Comparative Example 2, the maximum stress is within the allowable range (maximum 1.0). I have. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  The pentagonal rigid frame structure 1 (according to Example 3, FIGS. 1 and 2) of the present invention and a mountain-shaped rigid frame structure 2 described in Patent Document 2 (comparative example 3, conforming to FIG. 6) at a span of 80 m are compared. As Reference Example 3, a normal Yamagata ramen structure is also given. In Example 3 and Comparative Example 3, the lower ends of the compressed members 13 and 23 descended 3 m below the capital, and the ceiling height was set to 10 m with a margin of 50 cm. In Reference Example 3, the height up to the capital is 10 m in ceiling height. In the third embodiment, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 3 and Reference Example 3, the slope 14 has a 15/100 gradient.

The total weight (excluding gusset plates, bolts and nuts) and maximum stress of one frame where the maximum stress is less than 1 when a vertical load of 10 kN / m is applied to Example 3, Comparative Example 3 and Reference Example 3 with a span of 80 m. Are shown in Table 4. In Example 3, the support 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped steel of 488 × 300 × 11 × 18, the inclined tensile material 12 is 130 × 130 × 12 angle material, and the compressed material 13 is φ165. 5 × 5.5 round pipe. Comparative Example 3 is a truss structure in which the struts 31 and the diagonal beams 34 are h = 200 cm, the upper and lower chord members are 250 × 250 × 9 × 14 H-shaped steels , and the lattices are 150 × 150 × 7 × 10 H-shaped steels . The inclined tensile member 32 is a round pipe of φ190.7 × 5.3, the compressive member 33 is a round pipe of φ114.3 × 4.5, and the hook 35 is a round pipe of φ267.4 × 8, with ΔS of 8 m and ΔH of 5 m. I have. Reference Example 3 has a configuration in which the inclined tension member 32, the compression member 33, and the brace 35 are removed from Comparative Example 3 (see FIG. 6). The strut and the diagonal beam have a truss structure of h = 300 cm. × 250 × 9 × 14 H-shaped steel , lattice is 175 × 175 × 7.5 × 11 H-shaped steel .

  While the total weight of Example 3 was 13.229 t (weight ratio = 100%) and the maximum stress was 0.86, the total weight of Comparative Example 3 was 21.336 t (weight ratio = 161%) and the maximum stress was Was 0.53, the total weight of Reference Example 1 was 19.921 t (weight ratio = 151%), and the maximum stress was 0.66. In Example 3, although the maximum stress degree was inferior to Comparative Example 2 and Reference Example 2, it was still within the allowable range, and the total weight of one frame was reduced by 50% to 60% of Comparative Example 2 and Reference Example 2. It has become. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  The pentagonal rigid frame structure 1 (according to Example 4, FIGS. 1 and 2) of the present invention in a span of 100 m is compared with the mountain-shaped rigid frame structure 2 described in Patent Document 2 (comparative example 4, conforming to FIG. 6). As Reference Example 4, an ordinary Yamagata ramen structure is also given. In Example 4 and Comparative Example 4, the lower ends of the compression members 13 and 23 descend 4 m below the capital, and the ceiling height is set to 10 m with a margin of 50 cm therebetween. In Reference Example 3, the height up to the capital is 10 m in ceiling height. In the fourth embodiment, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 4 and Reference Example 4, the slope 14 has a 15/100 gradient.

The total weight of one frame (excluding gusset plates, bolts and nuts) and the maximum stress when the maximum stress is less than 1 when a vertical load of 10 kN / m is applied to Example 4, Comparative 4 and Reference 4 with a span of 100 m Are shown in Table 5. In Example 4, the column 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped steel of 700 × 300 × 12 × 28, the inclined tensile material 12 is an angle material of 130 × 130 × 12, and the compressed material 13 is φ216. It is a 3 × 5.8 round pipe. Comparative Example 4 is a truss structure in which the support 31 and the diagonal beams 34 are h = 300 cm, the upper and lower chord members are H-shaped steel of 300 × 300 × 10 × 15, and the lattice of the support 21 is 200 × 200 × 8 × 12 H. Shape steel , H-shaped steel with a lattice of 150 x 150 x 7 x 10 with a diagonal beam 34, round pipe with inclined tensile material 32 of 216.3 x 8.2, round pipe with compressed material 33 of 190.7 x 7 35 is a round pipe of φ318.5 × 9, with ΔS being 10 m and ΔH being 5 m. Reference Example 4 has a configuration in which the inclined tension member 32, the compression member 33, and the brace 35 are removed from Comparative Example 4 (see FIG. 6). × 300 × 10 × 15 H-type steel, H-section steel of lattice struts 200 × 200 × 8 × 12, an H-shaped steel lattice of Hasuhari is 175 × 175 × 7,5 × 11.

  While the total weight of Example 4 was 28.569 t (weight ratio = 100%) and the maximum stress was 0.75, the total weight of Comparative Example 2 was 40.109 t (weight ratio = 140%) and the maximum stress was The total weight of Reference Example 1 was 34.219 t (weight ratio = 120%), and the maximum stress was 0.72. Example 4 has a higher maximum stress than Comparative Example 4, but is equivalent to Reference Example 4. The total weight of one frame is reduced by 40% with respect to Comparative Example 2, and 20% with respect to Reference Example 4. It is kept low and low. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

  The pentagonal rigid frame structure 1 of the present invention (based on Example 5, FIG. 1 and FIG. 2) at a span of 120 m is compared with the mountain-shaped rigid frame structure 2 described in Patent Document 2 (Comparative Example 5, based on FIG. 6). As Reference Example 5, a normal Yamagata ramen structure is also given. In Example 5 and Comparative Example 5, the lower ends of the compressed members 13 and 23 descend 5 m below the capital, and the ceiling height is set to 10 m with a margin of 50 cm therebetween. In Reference Example 5, the height up to the capital is set to a ceiling height of 10 m. In the fifth embodiment, the lower oblique beam 14 has a 30/100 gradient, and the upper oblique beam 15 has a 10/100 gradient. In Comparative Example 5 and Reference Example 5, the slope 14 has a 15/100 gradient.

Total weight of one frame (excluding gusset plates, bolts and nuts) and maximum stress when the maximum stress is less than 1 when a vertical load of 10 kN / m is applied to Example 5, Comparative 5 and Reference 5 with a span of 120 m. Are shown in Table 6. In Example 5, the column 11, the lower oblique beam 14, and the upper oblique beam 15 are H-shaped steel of 800 × 300 × 14 × 26, the inclined tensile material 12 is an angle material of 150 × 150 × 12, and the compressed material 13 is φ267. It is a 4 × 6.6 round pipe. Comparative Example 5 is a truss structure in which the support 31 and the diagonal beam 34 are h = 300 cm, the upper and lower chords are H-shaped steel of 350 × 350 × 12 × 19, and the lattice of the support 31 is 200 × 200 × 8 × 12 H. Shape steel , H-shaped steel with a lattice of 175 x 175 x 7.5,5 x 11 with diagonal beams 34, round pipe with inclined tensile material 32 of φ216.3 x 8.2, round pipe with compressed material 33 of φ190.7 x 7, The brace 35 is a φ355.6 × 12 round pipe with ΔS of 12 m and ΔH of 5 m. Reference Example 5 has a configuration in which the inclined tension member 32, the compression member 33, and the brace 35 are removed from Comparative Example 5 (see FIG. 6). The strut and the diagonal beam have a truss structure of h = 300 cm. H-type steel × 350 × 12 × 19, H-type steel lattice struts 200 × 200 × 8 × 12, an H-shaped steel lattice of Hasuhari is 175 × 175 × 7,5 × 11.

  While the total weight of Example 5 was 35.869 t (weight ratio = 100%) and the maximum stress was 0.74, the total weight of Comparative Example 2 was 56.124 t (weight ratio = 156%) and the maximum stress was The total weight of Reference Example 1 was 54.972 t (weight ratio = 153%), and the maximum stress was 0.67. Example 5 has the same maximum stress as Comparative Example 5, but is equivalent to Reference example 5. The total weight of one frame is as low as 60% less than Comparative example 5 and Reference example 5. It is suppressed. From this, it is understood that according to the present invention, a building having excellent structural strength can be constructed while suppressing material costs and construction costs.

1 Pentagonal ramen structure
11 props
12 Inclined tensile material
13 Compressed material
14 Lower beam
15 Upper Oblique Beam 2 Yamagata Ramen Structure
21 props
22 Inclined tensile material
23 Compressed material
24 Oblique Beam 3 Yamagata Ramen Structure
31 props
32 Inclined tensile material
33 Compressed material
34 Beam

Claims (4)

From the capitals of the pillars erected at a span of a fixed distance, extend a lower slope with a relatively high slope and an upper slope with a relatively low slope in the order described above, and abut the upper slope with the vertex at the center of the span A pentagonal rigid frame structure in which an inclined tensile member is erected between a lower end of the compressed material that is suspended from the apex and lower than the capital of the compressed material and the capital. The pentagonal rigid frame structure according to claim 1, wherein each of the lower oblique beam and the upper oblique beam has a horizontal length of 1/4 span. The pentagonal rigid frame structure according to any one of claims 1 and 2, wherein the lower oblique beam has a gradient higher than the 17/100 gradient and not higher than the 30/100 gradient. The pentagonal rigid frame structure according to any one of claims 1 to 3, wherein the upper oblique beam has a gradient of 3/100 or more and 10/100 or less.

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