JPH036721Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to the frame structure of a building.

[Conventional technology]

Conventionally, the framework of buildings such as gymnasiums, auditoriums, factories, warehouses, stores, etc., which have relatively large floor areas without pillars in the internal space of the building, has been constructed by simply installing ceiling beams horizontally or in a chevron shape to pillars of the same height on the peripheral wall. It was just a structure.

[Problem that the idea aims to solve]

As a result, the following problems arose. The bending moment of the ceiling beams was large in response to external forces, which caused problems with strength and earthquake resistance. That is,
In Figure 6, the beam span is l, the load is W, and the column...
The stiffness ratio coefficient of the beam is k, the Young's modulus is E, and the cross section is 2.
When the next moment is I, the moment C and the deflection δ _nax are as follows. C=(Wl ² /12)k ...(1) δ _nax =1/384・Wl ⁴ /El =0.00260・Wl ⁴ /EI ...(2) Since bending moment is also generated in the foundation part,
As shown in Figure 8 (plan view), underground beams were required. Distortion was likely to occur in the center of the roof. If the roof was horizontal, it was necessary to create a water slope in the center. The roof was prone to leaks and condensation. It was difficult to get natural light from the roof. The purpose of the present invention is to provide a novel frame structure that can eliminate these problems.

[Means to solve the problem]

As illustrated in FIG. 1, the frame structure of the present invention has left and right legs 1a of a truss structure,
Crotch-like legs 1, 1 whose upper ends 1b are joined with upper and lower joining materials 3, 4 to form an eight-shape are erected facing each other with a distance in the front and back, and left front and rear legs 1a, 1 are made.
The left and right upper end beams 5, 5 are constructed between the space a and between the right front and rear legs 1b, 1b, respectively, and the left and right ceiling support beams 6, 6 are similarly constructed slightly below the upper end beams 5, 5. Build a structure. In addition, a plurality of ceiling beams 11 are constructed on each left and right between these left and right ceiling support beams 6, 6 and a plurality of columns 9 on the left and right outer walls, and a top end beam 5 and a ceiling support beam 6 are installed on each left and right. are joined together in a truss shape with a large number of joining materials 7, and joining materials 16 are used to intersect the upper end beam 5 on the left side and the ceiling support beam 6 on the right side, and the upper end beam 5 on the right side and the ceiling support beam 6 on the left side in a triangular shape. , 17 in a truss shape, and protrudes above the left and right ceiling beams 11 between the upper end of the front crotch-like leg 1 and the upper end of the rear crotch-like leg 1. This is what constitutes the truss structure section 8.

[Effect]

This frame structure as a whole has a suspension structure with the crotch-like legs 1 on both the front and back sides, and converts the stress due to external force applied to the crotch-like legs 1 into the axial force of the left and right legs 1a and 1b forming the figure eight shape. The structure has a small bending moment and no unnecessary stress. Therefore, the amount of deformation of each member that occurs in the crotch-shaped leg body 1 can be suppressed to a minimum. That is, in FIG. 5, if the span between the left and right pillars 9 is l, and the distance between the ceiling support beams 6 on both the left and right sides of the hip-shaped leg 1 is n, then the moment C
And the deflection δmax is as follows. C={W・[l−n/2] ² /8}k = {W(l ² −2ln+n ² )/32}k …(3) δ _nax =0.0054W・[l−n/2] ⁴ /EI =0.0054・1/16・W・(l-n) ⁴ /EI……(
4) Even if n=0 here, the moment and deflection have the following relationship (conventional: present invention) compared to the conventional equations (1) and (2) above. {Wl ² /3}k: {Wl ² /8}k {0.00260・Wl ⁴ /EI}: {0.0003375・Wl ⁴ /EI} Also, the stiffness of the front and rear crotch-like legs 1 is higher than that of the pillars of the peripheral wall. Since the height of the base is extremely high and stress is concentrated on the crotch-like leg body 1, it is only necessary to make the foundation of this part strong, and therefore, when looking at the foundation as a whole, foundation work such as piles and concrete can be omitted. Furthermore, since the amount of deformation of the columns is small, the horizontal force applied to the column bases is also small, making it possible to omit underground beams in the direction between the beams, as shown in FIG. The ceiling section has a suspended structure consisting of the front and rear crotch-shaped legs 1 located at the left and right intermediate portions and the three-dimensional truss structure section 8 between them, and the beam span is less than half that of the conventional one, making it much larger. Can withstand live load. A light window for lighting, a ventilation window, etc. can be provided in the three-dimensional truss structure part 8 that projects upward from the ceiling beam 11 in a chevron shape between the upper parts of the front and rear crotch-like legs 1,
Water gradient installation is also possible.

【Example】

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Figure 1 is a perspective view of the frame structure according to the present invention;
The figure is a front view, Figure 3 is a cross-sectional view taken along the line in Figure 1, and Figure 4 is a cross-sectional view taken along the same line.A pair of front and rear legs 1 are located in the center of both the front and rear ends of the building. It is erected. Each crotch-like leg 1 connects the left and right legs 1a and 1b of the truss structure in a crotch-like manner, that is, two pillars 2 each of H-shape, I-shape, Z-shape, round shape, square shape, box shape, etc. The left and right legs 1a and 1b are joined to a truss structure with a large number of bonding materials 15 (pin connection or rigid connection), and these left and right legs 1
A and 1b are joined together at their upper ends and upper intermediate portions using bonding materials 3 and 4 so as to form a figure-eight shape, and as a whole form a substantially A-shape from the front. Left and right upper end beams 5, 5 are horizontally constructed between the front and rear legs 1a, 1a on the left side, and between the front and rear legs 1b, 1b on the right side, and slightly below these, as shown in the figure. In the example, left and right ceiling support beams 6, 6 are similarly constructed horizontally at the same height as the bonding material 4. These left and right ceiling support beams 6 are pin-joined or rigidly joined with a large number of joining materials 14, and furthermore, the upper end beam 5 and the ceiling support beam 6 are also pin-joined or rigidly joined to the truss structure by a number of joining materials 7 on the left and right sides. Furthermore, the upper end beam 5 on the left side and the ceiling support beam 6 on the right side, and the upper end beam 5 on the right side and the ceiling support beam 6 on the left side are pin-connected or rigidly connected to the truss structure with joining materials 16 and 17 that cross each other in a triangular shape. and
The space between the upper end of the front crotch-shaped column 1 and the upper end of the rear crotch-shaped leg 1 is a three-dimensional truss structure having a trapezoidal cylindrical shape as a whole. Hereinafter, this part will be referred to as the three-dimensional truss structure part 8. A large number of left and right pillars 9 and front and rear pillars 10 are vertically erected along the peripheral wall of the building at required intervals. A large number of ceiling beams 11 are horizontally constructed between the left and right columns 9 and the left and right ceiling support beams 6, and ceiling beams 12 are also horizontally intersected with the ceiling beams 11 between the front and rear columns 10. It is constructed in
The three-dimensional truss structure 8 is configured to protrude upward from the front end to the rear end at the center in the left-right direction of the roof of the building. Therefore, it is possible to provide lighting windows, ventilation windows, etc. in this three-dimensional truss structure 8, and it is also possible to install water gradients along the left and right edges thereof. Further, the roof portions on both the left and right sides of the three-dimensional truss structure 8 have a hanging structure supported by the three-dimensional truss structure 8. In this case, the space truss structure 8
Since it has a trapezoidal cross section including a triangular portion, it is possible to convert the bending moment into axial force and transmit the stress to the left and right legs 1a and 1b of the crotch-shaped leg 1. In addition, in the crotch-shaped leg body 1 itself, the bending moment is converted into axial force by the bifurcated left and right legs 1a and 1b,
A small bending moment can be achieved. Furthermore, if the roof brace 13 is installed diagonally between the ceiling beams 11 and 12 to create a truss structure,
By shortening the distance between the supporting points of the ceiling beams 11 and 12, the bending moment can be reduced.
Even if thin materials are used for 1 and 12, a predetermined strength can be maintained. Furthermore, the fulcrum force can be transferred to the ceiling support beams 6 on both the left and right sides of the space truss structure 8, and the main force can be concentrated on this space truss structure 8. Moreover, this three-dimensional truss structure 8 allows installation of a water slope at the center of the roof, and a no-snow construction method that does not cause leaks or condensation can be adopted. Note that the legs 1a, 1b, the upper end beam 5, the ceiling support beam 6, the columns 9, 10, and the ceiling beams 11, 12 may be made of steel, reinforced concrete, steel reinforced concrete, or the like.

[Effect of the idea]

The effects of the present invention are listed below. The overall structure is suspended by the crotch-shaped legs on both the front and back sides, and the stress caused by the external force applied to the crotch-shaped legs is converted into the axial force of the eight-shaped legs on both sides, resulting in a small bending moment and no unnecessary stress. In addition, the amount of deformation of each member of the crotch-like leg body itself can be minimized, and the strength and earthquake resistance are significantly improved compared to the conventional structure. The protruding framework made up of the upper parts of the front and rear crotch-shaped legs, the upper end beams at their upper ends, and the left and right ceiling support beams forms a solid three-dimensional truss structure beam that continues from the front end to the rear end in the middle part of the roof. Since the ceiling is supported so as to be divided into two on the left and right, the mechanical span distance of the roof is shortened (half of the conventional span distance).
Therefore, the number of columns and ceiling beams can be significantly reduced, and the amount of materials such as steel frames can be reduced significantly (35% to 40%) compared to the conventional method. Since stress is converted to axial force and concentrated on the front and rear legs, it is only necessary to make the foundation in this area strong, and when looking at the foundation as a whole, foundation work such as piles and concrete can be omitted. . Since the amount of deformation of the column as a whole is reduced,
The column base of the hanging member can be kept in a pinned state,
The underground beams in the direction between the beams can be omitted. The ceiling has a suspended structure with front and rear crotch-like legs located at the middle of the left and right sides and a three-dimensional truss structure between them, and the beam span is mechanically lower than that of the conventional two.
Since it is half the length, it can withstand a larger load. As a result, accidents caused by distortion in the center of the roof are reduced. In the part that protrudes upward from the center of the roof in a chevron shape, it is possible to install lighting windows and ventilation windows for daylight, allowing natural light to flood into the interior over a wider area compared to when these are installed on the surrounding walls, and improving efficiency. It allows for good ventilation and gives the building a unique appearance. As mentioned above, since columns, beams, foundation piles, underground beams, etc. can be omitted or reduced, the cost of materials and the construction cost including the foundation can be significantly reduced. Since the side structure is a suspended structure, the beam size can be kept small and the eave height can be kept low, thus reducing the interior and exterior area and reducing finishing construction costs. By streamlining the structure as described above, the internal volume is reduced by more than 10% compared to conventional systems, reducing running costs for heating and cooling. In addition, the above-mentioned top light lighting system allows for sufficient uniform lighting during the day, so energy can be saved in this respect as well. The hanging structure eliminates the need for any pillars in the interior space of the building, allowing effective use of floors, making it suitable for gymnasiums, auditoriums, factories, warehouses, stores, etc. The construction period can be shortened by reducing the amount of steel used, etc., and simplifying the foundation work.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an example of the frame structure according to the present invention, Fig. 2 is a front view thereof, and Fig. 3 is a perspective view of an example of the frame structure according to the present invention.
A sectional view taken along the line, and FIG. 4 is a sectional view taken along the same line. 5 and 6 are explanatory diagrams of bending moments caused by external forces, where FIG. 5 shows the case of the present invention and FIG. 6 shows the case of the conventional case. Figures 7 and 8 are layout diagrams of underground beams, with Figure 7 showing the case of the present invention and Figure 8 showing the conventional case. 1... Crotch-like leg body, 1a, 1b... Leg body, 2...
Column material, 3, 4... Joining material, 5... Upper end beam, 6...
Ceiling support beam, 7... Joining material, 8... Three-dimensional truss structure, 9... Column, 11, 12... Ceiling beam, 13...
... Roof brace, 14, 15, 16, 17... Bonding material.

Claims (1)

[Scope of utility model registration request] The upper ends of the left and right legs 1a, 1b of the truss structure are joined to each other by upper and lower joining materials 3, 4 in a figure-eight shape, and the crotch-like legs 1, 1 are separated from each other in the front and back and are erected facing each other. Left and right upper end beams 5, 5 are constructed between the front and rear legs 1a, 1a and between the right front and rear legs 1b, 1b, respectively, and the upper end beams 5,
Similarly, left and right ceiling support beams 6, 6 are constructed slightly below 5, and these left and right ceiling support beams 6, 6 are constructed.
A plurality of ceiling beams 11 are constructed on each of the left and right between the pillars 9 on the left and right outer walls, and upper end beams 5 and ceiling support beams 6 on the left and right are joined in a truss shape with a large number of bonding materials 7. At the same time, the upper end beam 5 on the left side and the ceiling support beam 6 on the right side, and the upper end beam 5 on the right side and the ceiling support beam 6 on the left side are joined in a truss shape with joining materials 16 and 17 that cross each other in a triangular shape. A three-dimensional truss structure portion 8 that protrudes above the left and right ceiling beams 11 is configured between the upper end of the front crotch-like leg 1 and the upper end of the rear crotch-like leg 1. The frame structure of a building.