JPH0715185B2 - Roof frame unit frame - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a unit frame structure of a roof frame structure which forms a roof frame structure of a three-dimensional truss flat plate continuously in two directions.

(Problems to be solved by the invention) A lattice beam type unit frame structure that is continuously assembled in two directions to form a roof frame of a three-dimensional truss flat plate is standardized by connecting upper and lower chord members with diagonal members and bundle members. It is easy to build by assembling the large beam and the small beam, and at the same time, there is an advantage that it has an appropriate in-plane rigidity, the stress of the two-direction large beam is equal, and the bending can be reduced. It is often used for roof structures of span structures.

The present invention was made by paying attention to the advantage of this lattice beam type unit frame, and is intended to newly propose a frame having a smaller member cross section and an economical structure.

(Means for Solving the Problem) According to the present invention, a tensile member is installed between a node of an upper chord member of a frame corner portion of a large beam and a node of a lower chord member of a small beam, which is a minimum unit of a lattice, to reduce the size of the small beam. The structure is such that the beam is hoisted and the stress is transmitted from the tensile material to the column, the stress of the small beam and the large beam to be transmitted from this is reduced, and thereby both members are made into a small cross section, and an economical frame structure is realized.

The frame is a large beam in which the upper and lower chords are connected by bundles and diagonals, and is assembled in a square shape.The upper chords, or the beam consisting of upper and lower chords and bundles and diagonals is inside the frame. A unit frame is formed by laying it in a grid pattern on a plane, and a roof frame of a three-dimensional truss plate is constructed by assembling the unit frames in two directions.

(Example) The present invention will be described below with reference to the drawings illustrating an example.

As shown in FIG. 1, the unit frame structure f of the present invention has a structure in which a large beam B is assembled in a rectangular shape and a small beam b is installed inside a frame F in a lattice shape. It is formed by being hung by T, and as shown in FIG. 2, it is assembled continuously in two directions to form a roof frame of a space truss flat plate.

The large beam B is formed by connecting the upper chord member 1 and the lower chord member 2 with the bundle member 3 and the diagonal member 4 as shown in FIG. 3, and the small beam b is the upper chord member 1 and the bundle member 3.
And diagonal member 4 or upper and lower chord members 1 and 2 as in girder B
The upper chord member 1 and the lower chord member 2 of the corner portion of the large beam B are connected to the pillar C, and the small beam b is the upper chord member 1 of the large beam B of the diagonal member 4 in the diagonal member 4. Connected.

Further, as shown in the figure, a tensile member T is provided between the nodes of the upper chord members 1 and 1 of each corner of the frame F, which is the minimum unit of the lattice of the unit frame f, and the lower chord members 2 and 2 of the beam g. The beam g is erected so as to be inclined diagonally in a plan view, and the beam b is restrained to the frame F by the tension member T.

FIG. 4 shows an example of the connection between the pillar C, the girder B, and the tensile member T when the pillar C is a steel frame (square steel pipe).

As shown in FIG. 5 and FIG. 5-I which is a sectional view taken along line XX of FIG. 4, the upper chord member 1 and the diagonal member 4 of the large beam B are joined in four directions at the top end position of the pillar C. In the middle direction of 1, tensile members T are also connected in all directions.

The tensile member T is a top chord of the pillar C and the lower chord member of the beam g as shown in FIG.
The gusset plate 5 is installed between the intersections on the 2nd and 2nd sides and is joined to each position.

FIG. 7 shows an example of the connection when the pillar C is made of precast concrete.

In this case, the girder B is placed on the pillar C, and the pillar C is placed on the pillar C as shown in FIG.
The diagonal member 4 is joined to the gusset plate 5 fixed to the top end surface by the anchor bolts 6, and the upper chord member 1 is joined to the gusset plate 5 for connection.

Further, as shown in FIG. 8-II, the lower chord member 2 abuts the joining metal 7 welded to its end face to the side surface of the column C, and penetrates the steel rod 8 between the opposing metal joints 7 and 7 with the column C sandwiched therebetween. As a result, it is joined to the pillar C.

Tension is introduced into the steel rod 8 to ensure the integrity of the S frame and the RC column C.

The lower end of the pillar C is embedded in the foundation and integrated by grout injection.

When the pillar C is made of cast-in-place reinforced concrete, the girder B is joined according to the case of the precast concrete.

(Advantages of the Invention) The present invention is as described above, and has a structure in which a tension member is erected between the frame of the minimum unit of the lattice and the beam to lift the beam, and the force of the beam is applied to the pillar. In addition to reducing the bending of the beam, it is possible to reduce the cross section of the member and realize an economical frame.

[Brief description of drawings]

1-I and II are plan views showing an example of assembly of the present invention, a cross-sectional view in a diagonal direction, FIG. 2 is a plan view showing a roof frame according to the present invention, and FIG. 3 is an outline of the present invention. FIG. 4 is a perspective view, FIG. 4 is an elevation view showing an example of joining a column and a girder,
Figure-I, II, and III are X-X line and Y-Y in FIG. 4, respectively.
Line, ZZ line sectional view, FIG. 6 is an elevation view showing a joint example of a column and a tensile member, FIG. 7 is an elevation view showing another joint example, and FIG.
FIGS. I and II are enlarged views of the upper chord member portion and the lower chord member portion of FIG. 7, respectively. f …… Unit frame, B …… Large beam, F …… Frame, b ……
Beams, 1 ... upper chord, 2 ... lower chord, 3 ... bundle, 4 ...
… Diagonal material, T… Tensile material, C… Pillar, 5… Gusset plate, 6… Anchor bolt, 7… Joining hardware, 8 ……
Steel rod.

Claims (1)

[Claims] 1. A unit frame structure which is assembled in two directions and constitutes a roof frame structure of a three-dimensional truss flat plate, in which a large beam formed by connecting an upper chord member and a lower chord member with a bundle member and a diagonal member is assembled in a square shape. Beams composed of upper chords, bundles and diagonals are laid inside the frame in a planar grid pattern, and the nodes of the upper chords of the corners of the frame, which is the minimum unit of the grid, and the beams. A unit frame structure of a roof frame made by installing tension members between the nodes of the lower chord members.