JP2794479B2 - Artificial ground that can effectively use the internal space - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an artificial ground in which the internal space of a planar truss with a small truss can be effectively used.

[Prior Art] Conventionally, as an artificial ground, one having a reinforced concrete or steel-frame structure is known, but in such a structure, the longer the span is, the longer the beam height is. (Beams) need to be higher,
Unable to meet the demand to lower the beam,
In places where pillars cannot be installed in the middle, such as over a road, the span is long, and the beam is low and it is difficult to apply it to a site with a long span, so recently the plane described in JP-B-38-21585 has been used. As shown in FIG. 8, a lower chord frame 25 is arranged side by side below an upper chord frame 24 having two sets of equally-spaced parallel chords 21 and 22 intersecting to form a lattice 23. ,
Two sets of parallel chords 26 passing through the projected diagonal of every other grid 23 in each direction of the parallel chords 21, 22 of the upper chord frame 24,
A grid 28 is formed by the intersection of 27, the intersection 29 of each parallel chord material 26, 27 of the lower chord frame 25 and the four corners e, f, g, h of the grid 23 of the upper chord frame 24 immediately above it. Artificial ground in which the upper part and the inner part are used in two layers by using a planar solid truss in which each diagonal member 30 is installed between them has come to be adopted.

[Problem to be Solved by the Invention] The artificial ground using the above-mentioned three-dimensional space truss is generally often used as a parking lot when utilizing the inside of the space truss. In this case, the ninth height of the truss, as shown in FIG. (Blame truss) H is height high enough time between downward diagonal member S H _1, sufficient vehicle path have a space width W Although it can be secured, when the overload on the truss is small, the truss is designed to be small considering the construction cost, but when the truss is small, both the vehicle height and the vehicle width are high as shown in Figure 10. There is a problem that the space with the height H ₁ and the width W is blocked by the diagonal material S, and a sufficient traffic path cannot be obtained.
Also, when used in a warehouse, an office or the like other than the parking lot, there is a problem that the required height is obstructed by the diagonal material S and the use space is greatly reduced.

It is an object of the present invention to solve the above-mentioned problems and to provide an artificial ground capable of obtaining a sufficient use space even when the truss is small.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems, and the parallel chord members crossing each other of the lower chord frame body cross each other of the upper chord frame members arranged above and above the parallel chord members. And the space between the parallel chords of the upper chord frame is 1/4 of the diagonal length of the lattice formed by the parallel chords crossing each other on the lower chord frame And diagonal members are erected at the intersections of the lattices of the lower chord frame and at the four corners of one lattice of the upper chord frame located immediately above these intersections, and reinforcing chords are provided between the lattices. The attached artificial ground, and the parallel chords of the lower chord frame that cross each other,
In the space truss arranged at an angle of 45 degrees, the other parallel chord of the lower chord frame has a predetermined ground width, and the middle parallel chord is arranged so as to divide the interval between the parallel chords into two, The interval between the parallel chords of the upper chord frame is 1/4 of the diagonal length of the lattice formed by one parallel chord and the other parallel chord of the lower chord frame.
, And all the intersections except the edge of the lattice formed by the other parallel chord material, the middle parallel chord material, and the one parallel chord material of the lower chord frame, and the upper chord located immediately above these intersections An artificial material in which diagonal members are erected at four corners of one lattice of the frame and three corners of a half lattice at the edge of the upper chord frame, and reinforcing chords are attached between these two lattices. In the present invention, means of an artificial ground in which wall pillars are attached in place of the diagonal material in the ground and the artificial ground described above are provided.

[Operation] The flat space truss used in the artificial ground according to the present invention is different from a flat space truss that connects the ends of diagonal members to form a triangle, in which diagonal members are provided between the upper and lower chord members so as to form a trapezoidal shape. However, the overload can be resisted by the axial resistance due to the truss effect and the bending resistance due to the double girder truss effect (Fehrendale effect).

In addition, since the reinforcing chords are attached to the grid of the upper chord frame body where the diagonal members are not installed between the grids where the diagonal members are installed, the grid may be deformed by the axial force of the diagonal members on both sides. It is possible to improve the proof stress and maintain the structure firmly.

Embodiment An embodiment of the present invention will be described with reference to the drawings.

1 to 3 show a first embodiment, in which one equally-spaced parallel chord 1 intersects with the other equally-spaced parallel chord 2.
Above the lower chord frame 4 constituting the lattice 3 by means of equidistant intervals having an angle of 1/4 of the diagonal length of the lattice 3 at an angle of 45 degrees with each of the parallel chord members 1, 2 of the lower chord frame 4 An upper chord frame 8 constituting a lattice 7 is juxtaposed by a parallel chord member 5 and a similar parallel chord member 6 intersecting therewith, and each intersection 9 of the lattice 3 of the lower chord frame 4 and immediately above these intersections 9 are arranged. A diagonal member (shown by a broken line) 10 is erected at the four corners a, b, c, and d of one lattice 7 of the upper chord frame 8, and the lattice 7 is provided with the diagonal member 10 erected on the upper chord frame 8. The reinforcing string 11 is attached between every other grid 7 and a flat space truss, the upper surface of which is used for construction premises, park premises, etc., and its internal space is a parking lot, a warehouse, Artificial ground used for offices.

4 to 6 show a second embodiment, in which one equally-spaced parallel chord 1 and the other equally-spaced parallel chord 2 having a predetermined ground width are crossed and the other is intersected. A lattice 3a is formed by intersecting an intermediate parallel chord 2a, which is half the distance between the parallel chords 2 and 2, with one of the parallel chords 1, to form a lower chord frame 4a, and a lower chord above it. Equally spaced parallel chords having an angle of 45 degrees with each of the parallel chords 1, 2, 2a of the frame 4a and having an interval of 1/4 of the length of the diagonal of the square formed by the two grids 3a 5 and similar parallel chords 6 that intersect this
The upper chord frame 8 having an end chord member 5a parallel to one of the parallel chord members 1 of the lower chord frame member 4a is juxtaposed at the edges, and the lattice 3a of the lower chord frame member 4a is provided. All intersections 9 except the edge of
And the four corners a, b, c, d of one lattice 7 of the upper chord frame 8 located immediately above these intersections 9, and 1/2 at the edge.
A diagonal member (indicated by a broken line) is erected at each of the three corners a, b, d or c, b, d of the lattice 7a. Each grid 7 of the installed upper chord frame 8
An artificial ground made of a planar solid truss is provided by attaching a reinforcing chord member 11 between the first and second lattices 7a.

In both the first embodiment and the second embodiment, the reinforcing string 11 can be omitted depending on the design.

Instead of the diagonal member 10, a wall column 10a formed by combining triangles as shown in FIG. 7 may be used.

[Effects of the Invention] According to the present invention, (1) when the overload is small, the truss can be reduced, but it is not necessary to increase the truss in order to obtain the effective height of the lane and the immigration space. (2) The inside of the truss can be used effectively even when the truss is low due to construction conditions, etc. (3) Buckling due to the overload is unlikely to occur due to the small pitch of the upper chord material In addition, the generation of bending stress due to the floor load is reduced, and an excellent effect is obtained as an artificial ground.

[Brief description of the drawings]

1 to 3 show a first embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is a front view, FIG. 3 is an exploded view, and FIG. (B) is a plan view of the diagonal material,
(C) is a plan view of the lower chord frame, (D) is a front view of an assembled state, (E) is a side view of (A), (F) is a side view of (B), and (G) is (C). ), FIG. 4 to FIG.
Fig. 4 is a plan view, Fig. 5 is a front view, Fig. 6 is a side view, Fig. 7 is a perspective view of a wall column, Figs.
FIG. 10 shows a conventional example, FIG. 8 is a plan view, and FIGS. 9 and 10 are front views, respectively. 1 ... parallel string material, 2 ... parallel string material, 2a ... middle parallel string material, 3 ... lattice, 3a ... lattice, 4 ... lower chord frame, 4a ...
Lower chord frame, 5 ... Parallel chord material, 6 ... Parallel chord material, 7 ... Grating, 7a ... Grating, 8 ... Upper chord frame, 9 ... Intersection, 10 ...
Diagonal material, 10a …… Wall column, 11 …… Reinforced chord

Claims (5)

(57) [Claims] An upper chord frame (8) on which parallel chord members (1) and (2) crossing each other of a lower chord frame (4) are juxtaposed.
In the three-dimensional truss arranged at an angle of 45 degrees with the parallel chord members (5) and (6) crossing each other, the interval between the parallel chord members (5) and (6) of the upper chord frame (8) is lower chord frame. The lattice of the lower chord frame (4) has a spacing of 1/4 of the diagonal length of the lattice (3) formed by the mutually intersecting parallel chords (1) and (2) of the body (4). A plane in which diagonal members (10) are erected at each intersection (9) of (3) and four corners of one lattice (7) of the upper chord frame (8) located immediately above these intersections (9). Artificial ground consisting of a three-dimensional truss. 2. A reinforcing chord member (11) is mounted between lattices (7) of an upper chord frame (8) on which a diagonal member (10) is erected.
The described artificial ground. 3. An upper chord frame (8) in which parallel chord members (1) and (2) crossing each other of the lower chord frame (4a) are juxtaposed.
In a three-dimensional truss arranged at an angle of 45 degrees with the parallel string members (5) and (6) crossing each other, the other parallel string member (2) of the lower chord frame (4a) is extended to a predetermined ground width. And the middle parallel chord (2a) so as to divide the interval between the parallel chords (2) into two.
And the interval between the parallel chord members (5) and (6) of the upper chord frame (8) is formed by one parallel chord (1) and the other parallel chord (2) of the lower chord frame (4a). 1/4 of the diagonal length of the grid to be
The other parallel chord (2) of the lower chord frame (4a)
And all the intersections (9) other than the edges of the lattice (3a) formed by the middle parallel chord (2a) and one of the parallel chords (1) and located immediately above these intersections (9) Diagonal members (10) were erected at the four corners of one grid (7) of the upper chord frame (8) and at the three corners of the half grid (7a) at the edge of the upper chord frame (8). Artificial ground made of a planar truss. 4. A reinforcing chord (11) between each grid (7) or between the grid (7) and a half grid (7a) of an upper chord frame (8) on which a diagonal member (10) is installed. The artificial ground according to claim 3, further comprising: 5. An artificial ground according to claim 1, wherein a wall column (10a) is attached in place of the diagonal member (10).