JPH04153424A - Large span suspension construction by v-type brace - Google Patents

Abstract

PURPOSE:To form a space without having any column under beams by making columns of both sides as posts to build a V-type brace in the shape of a suspension bridge, and suspending beams built to the columns of both sides with the V-type brace. CONSTITUTION:A V-type brace 5 is built to post sections 1 consisting of four posts 11-14 in four corners in the shape of a suspension bridge. After that, beams 21-33 built to the post sections 1 of both sides are suspended with the V-type brace 5. The V-type brace 5 consists of a structural steel or strand bundling a large number of high tensile force wires. According to the constitution, a non-column space B3 is formed under the beams 21-33, the story height of a building is limited lower, and the building having very high industrial value with excellent earthquake resistance can be obtained without having radical change by stories of horizontal rigidity.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a frame structure for forming a wide column-free space on the first floor or intermediate floor of a high-rise building.

[Conventional technology]

Conventionally, beams for each floor were spanned over pillars on both sides, creating a column-free space underneath, or appropriate floors were made into truss floors, and truss beams were used to make the height of one floor the height of the beam. The weight of each floor is transferred to the truss beams using compression columns or tension columns to support the floor, thereby creating a column-free space.

[Problem to be solved by the invention]

However, with the method of simply spanning the beams across the pillars on both sides and creating a column-free space underneath, increasing the span in an attempt to create a wide column-free space reduces the horizontal rigidity of the beams, so the beam height is increased. As a result, an increase in floor height is unavoidable. Furthermore, considering the floor height, there is a natural limit to the size of the beams, so it was actually extremely difficult to create a wide column-free space using this method. On the other hand, in structures using truss beams, the uses of truss floors are limited, and there is also the problem that the horizontal rigidity of the floor becomes too large compared to other floors, creating an imbalance in rigidity. Ta.

[Means to solve the problem]

The present invention has been made in order to solve the problems of the prior art described above, in which a V-shaped brace is constructed in the form of a suspension bridge using pillars on both sides as supports, and the beams constructed on the pillars on both sides are supported by the V-shaped brace. The object of the present invention is to provide a large-span suspension structure using V-shaped braces, which is characterized by suspending the beam and forming a column-free space below the beam.

[Effect]

The beam located in the second part of the column-free space is supported at both ends by columns facing each other on both sides, and the middle part is suspended from above by a V-shaped brace, so it can be used as a large-span structure using long beams. However, it is actually supported by a narrow span, making it possible to form a wide column-free space underneath. It is also possible to reduce the floor height of a building by reducing the height of the beams. In addition, under normal use conditions, a large bow tension stress is applied to the V-shaped brace due to the vertical load on each floor, so even if horizontal stress is combined during an earthquake, no large compressive force will be applied as a result. . Furthermore, since the V-shaped brace undergoes tensile yielding, the frame structure becomes highly tough.

【Example】

Next, the present invention will be explained in more detail based on an illustrated embodiment. The illustrated building B has a horizontal cross section of 7 m x 50 m, for example.
It is a 12-story high-rise building with a substantially rectangular shape, and pillar sections 1 each consisting of four pillars 11 to I4 are arranged at each of the four corners. In each column section 1, the distance between columns 11 and 12 and between columns 13 and 14 is 6 m, and the distance between columns 1.1 and 14 and between 12 and 13 is 7 meters, and each is connected to a foundation pile. (not shown). The spacing between the support columns 1 is 5 m1 on the adjacent side and 36 m on the side separated from each other. Reference numerals 21 to 33 are beams for each floor arranged at appropriate intervals (for example, 3 to 4.5 m), and slabs (not shown) are placed on each to construct each floor of the 1st to 12th floors. . code 4
Numerals 1 to 45 are pillars supporting the beams 23 to 33, which are installed at equal intervals of 6 m, and numeral 5 is a V-shaped brace. The V-shaped brace 5 is generally made of a steel frame or a strand made of a large number of high-tensile wire rods, and is attached to both opposing sides on the front side Bl and back side B2, which correspond to the long sides of the building B. It is constructed like a suspension bridge using the support section 1 as a support, and the beams 23 to 29 are
A column-free space B3 of approximately [i00++F is formed below the beam 22. That is, the beam 29 is connected to the columns 11 on both sides at positions 51 and 57, and the beam 27 is connected at a position 52 facing the column 41 and at a position 56 facing the column 45.
, the beam 25 is at a position 53 facing the column 42 and the position 55 facing the column 44, and the beam 23 is at a position 5 facing the column 43.
4 and connected at beams 24, 26 and 28, respectively.
are connected to the V-shaped brace 5 via lower beams connected by pillars 41 to 45, respectively. V
The connection between the mold brace 5 and these beams 22 to 33 is designed and constructed so that each of the beams 22 to 33 is horizontal during use, taking into consideration the weight of the equipment to be installed. That is, the beams 22 to 33 located above the column-free space B3 are connected to the V-shaped brace 5.
is suspended with an appropriate tension, and each of the beams 22 to 33 is constructed horizontally. The code I5 indicates the pillars 11 and 12 on each floor, and the pillars 11 and 1.
4 are conventional type braces provided for reinforcement. In the high-rise building B having the above configuration, the vertical loads of the beams 22 to 33 on each floor are supported by the pillars 1 on both sides via the respective ends and the V-shaped braces 5. Therefore, a large axial force is distributed around the outer periphery of the building, which provides a large resistance to the overturning moment during an earthquake. In addition, by constructing the support section 1 with four support supports 11 to 14 as in this embodiment, and connecting the support supports 11 and 12 and the support posts 11 and 14 with braces 15, the positions 5 and 57 are A part of the axial force transmitted from the V-shaped brace 5 to each column 11 is transmitted to the remaining columns 12 and 14, which have less external force, via the brace I5. It can be improved even further. Furthermore, since a large tensile stress is constantly acting on the V-shaped brace 5 due to the vertical loads of each floor on the beams 22 to 33, even if the horizontal stress is combined during an earthquake, a large compressive force will not act on it as a result. do not have. Therefore, in the V-shaped brace 5 of the present invention, the strength of the member is determined by the tensile strength, and the characteristics of the steel material are utilized more effectively than the conventional type of brace, which is designed based on the buckling strength during compression. are doing. Therefore, if the dimensions are the same, there is an advantage that greater strength can be obtained than the conventional type of brace. Furthermore, since it undergoes tensile yielding, it is possible to form a frame with high toughness. Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented in various forms according to the gist of the present invention. That is, there is of course no limit to the number of floors in the building B, and the structure is such that the V-shaped brace 5 is supported on the top floor of the pillar section 1 facing the building B on both sides.
It is also possible to provide a plurality of floors between the mold brace 5 and the column-free space B3. Moreover, it is also possible to provide the column-free space B3 not on the first floor but on an appropriate intermediate floor. Furthermore, the V-shaped brace 5 may be arranged only in the middle between the front surface Bl and the back surface B2 of the building B. By the way, since the internal space of the pillar part 1 provided at the four corners is surrounded by four pillars ll-14, and is reinforced by placing braces 15 on two sides,
In addition to being used as a normal room, it can also be used as an elevator installation, machine room, etc., so forming the support column 1 does not lead to a reduction in the effective space.

【Effect of the invention】

As explained above, according to the large span suspension structure using V-shaped braces according to the present invention, the width is 10 to 20 m and the length is 30 to 30 m.
A wide column-free space of 50 m can be easily formed in the low-rise part of a high-rise building, and since there is no need to increase the beam height, the total height does not increase unnecessarily. Also,
Another advantage is that there is greater flexibility in how all floors are used. Furthermore, since the weight of the building is transmitted to the pillars on both sides via the V-shaped braces, a large axial force is distributed around the outer periphery of the building, providing a large resistance to the overturning moment during an earthquake, resulting in excellent earthquake resistance. It became a building with a unique design. And since the V-shaped brace is designed with tensile strength,
Compared to conventional braces designed for compressive loads, which have the disadvantage of being prone to buckling, not only can material costs be reduced by using thinner members, but the tensile yield of the V-shaped braces has created a highly tough frame structure. You can. In addition, it has the advantage that there is no sudden change in horizontal stiffness depending on the floor, which is the fate of truss structures, and its industrial value is extremely large.

[Brief explanation of drawings]

The drawings are explanatory drawings showing one embodiment of the present invention, with FIG. 1 being a front view thereof and FIG. 2 being a plan view thereof. 1... Strut part ILI2.13.14... Strut 15... Brace 21-33... Beam 4L42.43.44.45... Column 5... V-shaped brace B... Architecture Old item...Surface part B2...Back part B3...Columnless space "' day 111"

Claims (1)

[Claims] A V-shaped brace is constructed like a suspension bridge using pillars on both sides as supports, and a beam installed on the pillars on both sides is suspended by the V-shaped brace, thereby forming a column-free space below the beam. Large span suspension structure with V-shaped braces.