JPH07122306B2 - Triangular solid truss structure, method of constructing triangular solid truss, and method of supporting triangular solid truss or triangular solid truss structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for structuring a triangular space truss, a triangular space truss structure using the triangular space truss, and a method for supporting the triangular space truss structure.

Conventional technology and problems to be solved by the present invention Conventional triangular space trusses that do not include lattices on all three structural surfaces are vulnerable to twisting as a truss unit, and a lot of hypothetical materials are required during construction to construct them. It took a long time.

Further, the conventional structure in which such triangular three-dimensional trusses are continuously arranged has a large number of members or man-hours.

The conventional triangular space truss that cannot disassemble the truss unit into a large flat truss element has a pre-completed shape at a place other than the construction site and transports it to the construction site for use. Takes a lot.

Further, the conventional method for supporting the triangular solid truss structure has a drawback that it is difficult to adjust the accuracy of construction such as thermal extension of the truss or the accuracy of the support structure at the construction site by the method of directly fixing to the column or the beam.

Objects and Means of the Present Invention A first object of the present invention is to provide two parallel upper chord members and one lower chord member and one upper chord member which are arranged equidistantly from each upper chord member in parallel with each upper chord member. Connect a plurality of horizontal members that connect the upper chord members to each other extending in the right-angled direction, and connect only one of the diagonal lines that connect the intersections of the horizontal members and the upper chord members for each grid formed by the horizontal members and the upper chord members. And a lattice that connects the intersection point of the upper chord member and the horizontal member with the diagonal member and the lower chord member that are arranged in a zigzag-like series in the adjacent cells and that corresponds to the midpoint of the adjacent horizontal members. A plurality of triangular space trusses are arranged in parallel in a row at regular intervals, and the trusses are connected by beam members extending substantially horizontal members and brace members extending substantially diagonal members. , In-plane after construction,
The object is to provide a triangular solid truss structure having high out-of-plane co-rigidity.

A second object of the present invention is to provide a support body composed of a triangular space truss unit or a triangular space truss structure, a main body standing on the base plate, and a gable roof-shaped member fixed to the top of the main body. The direction corresponding to the girder row of the gable roof-shaped member and the longitudinal direction of the triangular space truss constituting the triangular space truss structure are aligned and arranged, and the upper chord member of the triangular space truss is supported. A triangular three-dimensional truss unit that reduces the influence of the accuracy of the supporting structure such as columns and beams on the structure and is easy to install the truss, characterized by being placed on the body with a gusset plate and bolted Alternatively, it is to provide a method of supporting a triangular space truss structure.

If the expansion of the triangular space truss structure due to heat poses a problem during or after building, the bolt holes for fixing the bearing on at least one side should be elongated holes extending in the longitudinal direction of the chord material of the triangular space truss. It is preferable.

The body of the bearing can be H-section steel or steel pipe.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a triangular space truss for constructing a triangular space truss structure according to the present invention. In the figure, 1 is two upper chord members arranged in parallel, 2 is a lower chord member, and they are arranged at the vertices of an isosceles right triangle whose base is the upper chord member 1. The lower chord member 2 does not have to be a right-angled isosceles triangle as long as the position of the lower chord member 2 is a position forming an isosceles triangle with the upper chord member 1.

Reference numeral 3 is a lattice assembled between the upper chord member 1 and the lower chord member 2, and 5 is a beam member stretched between the upper chord members 1. The beam member 5 is stretched between both ends of the upper chord member 1 so as to form a square mesh with the upper chord member 1.

The lattice 3 is assembled so as to connect a point corresponding to an intermediate point between adjacent beam members 5 and an intersection point of the beam members 5 and the upper chord members 1.
Therefore, as clearly shown in FIG. 2, the lower chord member 2 has a total length shorter than that of the upper chord member 1 by one box, and is arranged at a position which is located inside the end of the upper chord member 1 by a half of one box at both ends. There is. However, even if the lower chord member 2 has the same length as the upper chord member 1,
It may be longer than the upper chord member 1, and in that case, a lattice may be formed between the ends of the upper chord member 1 and the lower chord member 2.

In the cells formed by the upper chord members 1 and the beam members 5, only one of the diagonal lines connecting the intersections of the horizontal members and the upper chord members is connected to each other in a grid-like manner, and a series of zigzags is formed in the adjacent cells. One diagonal member 4 is stretched over in a state of being connected to.

In the above-mentioned triangular space truss, one side of two plane trusses that have been preliminarily assembled is assembled into a right angle arrangement by an angle member, and connected by a beam member 5 and a diagonal member 4 through an appropriate gusset plate on the other side of both members. It is assembled. However, the method of assembling this triangular space truss is not limited to the above, and the entire structure may be assembled using an appropriate gusset plate or bending plate.

This triangular space truss has a short buckling length and is extremely efficient in structure.

3 and 4 use the above-mentioned triangular space truss,
Figure 3 shows a triangular space truss structure according to the invention forming a roof frame, which is arranged in rows and is connected laterally by beam members 5'and brace members 4 '.

Beam members 5 ′ are arranged in the extension direction of the beam members 5 between the triangular space trusses, and the beam members 5 ′ and the upper chord members 1 connect the triangular space trusses to each other so that a rectangular mesh is formed. Then, in the square, the brace material 4'is attached to the diagonal material 4 of the triangular space truss.
It has been extended to the extended state.

The connection between each triangular solid truss and the beam member 5'and the brace member 4'may be performed by a conventional means such as using an appropriate gusset plate.

This triangular space truss structure has high in-plane and out-of-plane rigidity due to the cooperation of the brace member 4'and the beam member 5 ', and is excellent in stability and wind resistance.

Further, according to this triangular three-dimensional truss structure, the span of the beam member 5 is halved as compared with the conventional plane truss structure.
Not only can it be economically realized, such as saving the cross section of beam material, but also a truss structure with a three-dimensional appearance is constructed using a plane truss as an element, and it is also possible to create an aesthetic effect for a building structure.

Furthermore, the diagonal member 4 and the brace member 4'arranged in a zigzag shape on the upper surface, that is, extended and arranged in a state like one, cooperates with the beam members 5 and 5'and not only resists pulling. , It helps to stabilize the triangular space truss in the lateral direction during erection, and makes it possible to save hypothetical materials and shorten erection time.

5 and 6 show a triangular space truss constructed by the method of the present invention. The construction method of the triangular space truss of the present invention will be described with reference to these drawings.

One side of two sets of flat trusses, which are pre-structured by the upper chord member 1 ', the lower chord member 2', and the lattice 3 ', that is, the lower chord member 2', is angled, that is, equilateral angle steel 18 is used to bolt the point a or 90 ° angle connection by welding. The beam member 5 ″ is assembled to the upper chord member 1 of the two-dimensional triangular truss through the gusset plate 6 attached to the predetermined position of the upper chord member 1 ′. Same as the mesh formed by the upper chord member 1 and the beam member 5 ″. Diagonal diagonal 4 "through gusset plate 6
Is installed.

As shown in FIG. 7, the gusset plate 6 is such that another plate 8 is erected on one surface of a plate 7 having a constant shape, and an angle member 9 is welded to the back surface corresponding to the position of the other plate 8. . The angle member 9 needs to have a side length of at least the upper chord member 1'or more. The gusset plate 6 is bolted to the upper chord member 1'at point b.
The entire triangular triangular truss is assembled by bolting the beam member 5 ″ to the standing plate 8 of the gusset plate 6 at the point c.

According to the method of the present invention, which is exemplified by the above-described embodiment, it is possible to assemble a plane truss as a structural unit at a construction site with a joint metal, that is, an angle member or a bending member, a gusset plate, etc., very easily. Not only is the efficiency very high, but it is also very efficient in the storage and transportation of truss elements.

Further, for example, two equilateral angle steels are juxtaposed so as to form an X-shaped cross section to form an upper chord member, and the strength of the upper chord member is increased. For example, the upper chord member 1'and the lower chord member 2 ', There is an advantage that the number of lattices 3'can be adjusted and construction is possible even when there is a restriction on the supply of member size.

FIG. 8 and FIG. 9 show an embodiment of a bearing used in a method of bearing a triangular space truss structure according to the present invention.

In this embodiment, a case of supporting the roof frame by the triangular space truss structure shown in FIGS. 3 and 4 is shown.

The support 10 includes a base plate 11 and the base plate 11
It is composed of a main body 12 made of H-shaped steel erected in the vertical direction, and a gable roof 13 mounted on the upper end of the main body 12 and having a gable roof shape.

The entire roof frame is the upper chord member of the triangular space truss unit 1
It is mounted on a support 10 arranged at the position indicated by d in FIG. 3 so as to be supported at both ends thereof.

The support body 10 includes anchor bolts 15 pre-embedded at predetermined positions corresponding to the above d on a beam 14 installed at a constant height.
The base plate 11 is fixed by. Bearing 10
The direction corresponding to the girder row of the angle steel 13 is aligned with the longitudinal direction of the triangular space truss that constitutes the roof frame structure to be erected.

Place the upper chord member 1 of the triangular solid truss unit on the angle steel 13 of the support 10 with the gusset plate 17 interposed, and
Secure with bolts at the points.

A gusset plate 17 wider than the side length of the upper chord member 1 is fixed to the end of the upper chord member 1 of the triangular solid truss unit. Only the upper portions of the lattices 3'at both ends are not fixed to the upper chord member 1, but are fixed to the gusset plate 17.

The bolt hole 16 at the point e is formed in the overlapping portion of the upper chord member 1 and the gusset plate 17. The bolt hole 16 is a long hole extending in the longitudinal direction of the upper chord member 1 at least at one end of the triangular space truss unit.

In the roof frame structure, first, a triangular space truss unit is mounted on the support 10 at a substantially predetermined position, and then a beam member 5'and a brace member 4'are assembled and assembled.

With the triangular space truss unit supported on the support body 10, the triangular space truss unit is movable in the longitudinal direction.

For this reason, when the above-mentioned bearing method is used, the triangular space truss unit is movable in the longitudinal direction and the bolt holes are long holes as described above. It is possible to absorb the change in material length due to heat afterwards or the roughness of processing accuracy, and it is possible to secure the building accuracy, which reduces the influence of the accuracy of the supporting structure such as columns and beams on the roof structure. And, truss construction can be done easily.

The body of the support 10 may be a steel pipe or a channel steel.

Conventional members can be used for the respective members constituting the triangular solid truss or the structure thereof according to the present invention.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a triangular space truss constituting the triangular space truss structure of the present invention, FIG. 2 is a side view of the triangular space truss of FIG. 1, and FIG. 3 is a triangular shape of the present invention. Fig. 4 is a partial plan view of the space truss structure, Fig. 4 is a partial side view of the structure of Fig. 3, Fig. 5 is a front view of a triangular space truss constructed by the method of the present invention, and Fig. 6 is Fig. 5. 7 is a partial side view of the triangular space truss, FIG. 7 is a perspective view of a gusset plate used for the triangular space truss structure of FIG. 5, and FIGS. 8 and 9 are views showing a usage state of the bearing according to the present invention. Is.

Claims (9)

[Claims] 1. Two parallel upper chord members and one lower chord member arranged parallel to each upper chord member at an equal distance from each upper chord member and upper chord members extending in a direction perpendicular to the upper chord members. For connecting each of the horizontal members and the upper chord member formed by a plurality of horizontal members, connecting only one of the diagonal lines connecting the intersections of the horizontal members and the upper chord members, and connecting them in a zigzag pattern at adjacent cells. A plurality of triangle-shaped three-dimensional trusses consisting of diagonal points and lower chords, which are connected to each other, and a lattice corresponding to the midpoint of adjacent horizontal timbers, and a lattice that connects the intersection points of the upper chords and horizontal timbers are arranged at regular intervals. A triangular three-dimensional truss structure characterized in that the trusses are placed parallel to each other and are connected to each other by beam members extending substantially horizontal members and brace members extending substantially diagonal members. 2. A support body comprising a board, a main body standing on the board, and a member having a gable roof shape fixed to the top of the main body, and a support corresponding to a girder row of the gable roof shape member, and two supporting members. Parallel upper chord members and a plurality of horizontal members that connect the upper chord members to each other and extend in a direction perpendicular to the upper chord members and one lower chord member that is arranged in parallel with each upper chord member at an equal distance from each upper chord member. For each grid formed by the horizontal member and the upper chord member, only one of the diagonal lines connecting the intersections of the horizontal member and the upper chord member is connected, and the adjacent grids are arranged in a zigzag manner. Triangular truss consisting of a point that corresponds to the midpoint of the adjacent horizontal members of the diagonal members and the lower chord member and the lattice that connects the intersection of the upper chord members and the horizontal members. Place the upper chord material of the space truss on the support with a gusset plate interposed Bearing method of triangular space truss, characterized in that bolting. 3. A gable roof-shaped support body comprising the triangular space truss structure of claim 1 and a main body erected on the base plate and a member having a gable roof shape fixed to the top of the main body. Are arranged so that the direction corresponding to the girder row of the member and the longitudinal direction of the triangular space truss forming the triangular space truss structure are aligned with each other, and the upper chord member of the triangular space truss is interposed between the gusset plates. A method for supporting a triangular space truss structure, which is characterized in that it is placed and bolted. 4. Two parallel upper chord members and one lower chord member disposed in parallel to each upper chord member at an equal distance from each upper chord member and upper chord members extending in a direction perpendicular to the upper chord members. For connecting each of the horizontal members and the upper chord member formed by a plurality of horizontal members, connecting only one of the diagonal lines connecting the intersections of the horizontal members and the upper chord members, and connecting them in a zigzag pattern at adjacent cells. At least one side of a triangular solid truss consisting of a diagonal member and a lower chord member, which are connected to each other, and a lattice point connecting the intersection point of the upper chord member and the horizontal member and the point corresponding to the midpoint of the adjacent horizontal member. A method for supporting a triangular space truss, in which the bolt holes for fixing the support are elongated holes extending in the longitudinal direction of the upper chord member. 5. A triangular solid body, wherein at least one side of the triangular solid truss structure body according to claim 1 has a bolt hole for fixing a support body as an elongated hole extending in a longitudinal direction of an upper chord member of the triangular solid truss structure body. Truss structure support method. 6. The method of supporting a triangular space truss according to claim 3, wherein the main body of the support is H-shaped steel. 7. The method for supporting a triangular space truss structure according to claim 4, wherein the main body of the support is H-shaped steel. 8. The method for supporting a triangular space truss according to claim 3, wherein the main body of the support is a steel pipe. 9. The method for supporting a triangular space truss structure according to claim 4, wherein the main body of the support is a steel pipe.