JPS62101765A - Grating like cable dome - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a lattice cable dome that is an improved version of the radial cable dome used in large span M4 structures.

Conventional technology Radial cable domes are known for a long time.

That is, as shown in FIGS. 4 to 7, there is a main cable (11) radially extending from the central Pinter tension ring (1o), and a vertical boss +-(
12), a diagonal cable (15) connecting the lower end (13) of the vertical post (12) and the upper end (14) of the vertical post (12) outside thereof, and the lower end (12) of the vertical post (12) at the same height. The ring cable (13) is connected to the upper end (14) of the outermost vertical post (12) from the assembled state as shown in Figure 5 to the upper end (14) of the outermost vertical post (12) as shown in Figure 6.
Through that inside! T! Direct boss l-(12) lower E (
13) to the diagonal cable (15) fixed to the outside to raise the vertical boss 1-(12a), and then sequentially apply tension to the diagonal cable connected to the vertical post boss 1- on the inside thereof. Then, the vertical posts are raised, and the entire roof is raised as shown in Figure 7.

With this configuration, there is less increase in dead space due to an increase in span like with a three-dimensional truss/b cable beam, and the roof is relatively light, reducing costs and construction time. , air 119 [Unlike 4-story buildings, pressurization and ventilation equipment are not required, and by providing an opening, air conditioning is possible using a natural ventilation method, and it also has the advantage of providing a bright space without pillars or beams. are doing.

Problems to be Solved by the Invention In the above conventional radial cable dome, the main cable is stretched radially, so it is relatively easy to move the main cable in a direction perpendicular to the axis, and the rigidity within the roof surface is low. Therefore, in-plane torsional deformation and horizontal deformation are likely to occur, and the weight of the roof is greater at the center than at the periphery, causing greater vertical deformation and vibration in the center due to loads such as wind and snow. . Even if an attempt is made to increase the number of radial cables to strengthen rigidity, the area for fixing all cable ends to the center tension ring is limited, making design difficult. The strength of the center tension ring must be increased in order to withstand the enormous tension of the roof, which increases the size and weight of the center tension ring.Furthermore, the large number of cable intersections and long total cable length increases the weight of the center tension ring, making it difficult to reduce the weight of the roof. Moreover, because the planar shape of the dome is circular, it is difficult to apply it to non-circular buildings.Furthermore, it is necessary to apply equal tension horns to each diagonal cable at the same time to pull up the cable dome, which makes the work difficult. There were problems such as the construction was not easy and required careful attention.

Means for Solving the Problems Means for solving the above problems will be explained with reference to FIG. This invention provides a vertical post (3) at the intersection (2) of the main cable (1) stretched in a grid pattern, and extends from the lower end of the vertical post (3) to the outer vertical post (3) or fixing point (7). ) passing through the upper end (6) of the diagonal cable (5
) and the lower end (4) of the vertical post (3) of the same height.
This is a lattice-like cable dome in which the cables are connected by ring cables (8).

Function: As shown in Figures 1 and 2, this invention arranges the main cables in a lattice pattern and provides vertical posts at the intersections, so the main cables are less likely to deform than those arranged radially. In-plane stiffness increases. In addition, as shown in Figure 3, when the length of the main cable arranged in a lattice pattern and the length of the main cable arranged radially are the same and the vertical axis is J3 (1.0), as the number of spans increases, the length of the ring cable increases. Although the cable length increases, the length of the cables across the entire roof surface is smaller in the lattice arrangement than in the radial arrangement, and the number of cable intersections is reduced to about 172, so the roof @
Suspension is significantly reduced. Furthermore, since the main cables are arranged in a lattice pattern, the weight distribution is almost uniform throughout the roof, and the central part does not deform vertically or cause large vibrations due to earthquakes, unlike those with a radial arrangement. .

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

Figure 1 shows the configuration of a cable dome that is approximately circular, and Figure 2 shows the configuration of a cable dome that is approximately rectangular. 1) are laid out in a grid pattern vertically and horizontally. A vertical post (3) is placed at the intersection (2) of these vertical and horizontal cables (1).
A diagonal cable (5) is fixed to the lower end (4) of the vertical post (3), and the diagonal cable (5) is stretched through the upper end (6) of the vertical post (3) on the outside thereof. A diagonal cable (5) fixed to the lower end of the vertical post (3) at its outermost end is strung through fixing points (7) that define the contour of the dome. Vertical posts of the same height (
The lower ends (4) of 3) are connected at four or eight corners by ring cables (8) shown in broken lines.

The outermost diagonal cable (5) of the cables in this ground-assembled configuration is pulled outward from the lower end of the vertical post (3) through the fixing point (7).
) and then pull up the diagonal cable (5) on the inside to complete the dome.

Effects of the Invention In addition to the various advantages of the radial cable dome described in the above-mentioned prior art, the present invention also provides (1)
) Since the main cable is rectangular and the ring cable is rectangular or octagonal, it has high in-plane rigidity and is less prone to torsional deformation or horizontal displacement.

(2) Since the weight distribution of the roof is substantially uniform, the central part does not deform in the vertical direction or cause large vibrations due to earthquakes, etc., unlike those with radial cable arrangement. (3) Since the main cables are stretched in a lattice pattern, there is no need for a center tension ring like in radial cable arrangement, so there are design difficulties in handling the cable ends even when the number of cables increases. The roof can be made lighter because there is no need for this, and the weight of the center tension ring is reduced. (4) Since the number of cable intersections is significantly reduced compared to the radial cable arrangement, there are fewer joints and the total cable length is also reduced, so the weight of the roof can be reduced from this point of view as well. (5) Since the cable arrangement is in a grid pattern, there is no need for construction considerations such as applying equal tension to all of the main cables at the same time as in the case of radial cable arrangement, making the work easier. Construction efficiency is improved because there are fewer (6) The planar shape of the roof is not limited to a circular shape as in the case of a radial cable arrangement, but can be made into a rectangular or circular shape, so it can be applied to buildings with various planar shapes. There are many effects such as

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a perspective view of a circular dome, FIG. 2 is a perspective view of a rectangular dome, and FIG. 3 is a lattice arrangement regarding cable length, etc. Figure 4 shows a conventional example and is a perspective view of a radial cable dome. Figures 5, 6, and 7 each show a longitudinal section of Figure 4 in the diametrical direction. It is an explanatory view of a raised state of the roof. (1)...Main cable, (2)...Intersection, (3
)...Vertical post, (4)...Bottom end, (5)...
Diagonal cable, (6)...Top end, (7)...Fixing point, (8)...Ring cable. -to η size glass Q Sa Nosu 27/Akimitsu 3 Figure 4 Figure 4 Exit G

Claims (1)

[Claims] Vertical posts (3) are provided at the intersections (2) of the main cables (1) stretched in a grid pattern, and the lower ends (4) of the vertical posts (3)
) to its outer vertical post (3) or fixed point (7)
A lattice-like cable dome with diagonal cables (5) running through the upper end (6) and connecting the lower ends (4) of vertical posts (3) of the same height with ring cables (8).