JPH01137080A - Hanger type suspension membrane structure - Google Patents

Abstract

PURPOSE: To improve wind pressure-resistant performance and tension resistance with a lightweight structure by suspending membranes from suspension materials arranged in parallel or radially via wires, and arranging pressing cables at the intermediate positions. CONSTITUTION: Wires 11 are suspended from multiple positions of suspension materials 10 arranged nearly in parallel or nearly radially to hang and support stretched membranes 12. Pressing cables 13 are arranged in the same direction as the suspension materials 10 on the membranes 12 at the intermediate positions between the suspension materials 10 to apply tensile force to the membranes 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a novel composite membrane structure suitable for relatively large span buildings.

(Prior art and its problems) At present, the forms of membrane structures that are commonly used include air membrane structures, suspension membrane structures, and frame membrane structures.

In the air membrane structure, the outward bulging curvature of the membrane material is made relatively small, making it a so-called low-rise curved surface, so that the wind pressure applied to the membrane material acts as negative pressure as much as possible, making it stable. It can exhibit excellent wind resistance performance.

In addition, by appropriately arranging reinforcing cables in the membrane material, it becomes possible to secure a huge span such as that of an indoor town baseball stadium, for example.

However, in order to maintain the shape of the membrane surface, it is necessary to constantly blow air, and maintenance is extremely complicated and costs a considerable amount, making it economically unsuitable for buildings with small to medium spans of 100 m or less.

Furthermore, since the interior is a sealed closed space, it lacks the comfort that comes from openness and ventilation, and it also lacks a sense of the season.

Next, in the suspension membrane structure, the membrane material can be expected to have the inherent curved resistance of the membrane structure, it is easy to introduce prestress, and it has advantages such as being aesthetically beautiful. It has the characteristics of being able to obtain a large-scale continuous space.

However, in the case of a strut-type suspension membrane structure, the struts may get in the way depending on the application, and
In the case of a single arch type, there is also the problem that the stability of the arch deteriorates due to unbalanced tension distribution on both sides of the arch, making it difficult to obtain the independence of the support frame.

Next, FIG. 8 shows an example of the above-mentioned frame membrane structure, in which a membrane material 3 is stretched over the upper surface of a self-supporting frame l such as a three-dimensional truss via a secondary member 2.

This frame-type membrane structure has features such as high independence of the frame, forming a freely curved shape, and vines.

It also has the advantage of being easy to design since there are no plane or cross-sectional constraints.

However, when the membrane surface made of the membrane material 3 is stretched over the grid of the three-dimensional truss type frame 1 as in the example shown in FIG. 8, the wind pressure applied to the membrane surface is Since the load is borne by the frame l via the point support,
It is difficult to expect sufficient strength, and if a line support method is used along the frame l, an additional secondary member 2 is required to maintain the shape of the membrane surface and prepare for deformation contact, etc. It is difficult to obtain economical benefits from frame materials, and the membrane material 3 has a small size and curvature for a structural membrane. Rather, it is necessary to use a translucent finishing material such as glass or acrylic to cover the top surface of the frame l as a structural material. There is a problem in that it cannot be said that the tension resistance system provided by the membrane surface, which the membrane structure should originally have, which only has the function of covering, is fully utilized.

Furthermore, since the frame 1 is located below the membrane material 3, only the form of the frame 1 is emphasized to the person inside, and the beauty such as the lightness and elasticity that the membrane curved surface should have is diminished.

In addition, although arch-type cables are sometimes used to tension the membrane surface, the distance between the frames is usually too short, making it difficult to expect wind-resistant effects from the cables, and the structural system lacks rationality. have.

The present invention was developed in view of the above-mentioned conventional problems, and aims to provide a hanger-type suspension membrane structure based on a novel composite membrane structure that combines the advantages of each membrane structure described above. purpose.

(Means for Solving the Problems) In order to achieve the above object, in the hanger type suspension membrane structure according to the present invention, each suspension member is arranged substantially parallel or radially, and each suspension member is A presser is placed on the membrane material in the same direction as each suspension material and applies tension to the membrane material at an intermediate position between the membrane material suspended from a plurality of locations by wire materials and the suspension material. It is characterized by comprising a cable.

(Example) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 5 show an embodiment of the present invention, and FIG. 1 is a perspective view of a main part showing one constituent unit of a membrane structure according to the embodiment,
FIG. 2 is a plan view of a building using the membrane structure according to this example, FIG. 3 is a side view of FIG. 2, FIG. FIG. 3 is an end view showing a planar configuration.

As shown in FIG. 1, the suspension membrane structure according to this embodiment includes a suspension wire 10 as a suspension material, a strut cable 11 as a wire material,
It comprises a membrane material 12 and a holding cable 13.

The suspension wires 10 are arranged in parallel at predetermined intervals, and have a downwardly curved arc shape as shown in FIGS. 1 and 4.

From each suspension wire 10, in this embodiment, 7
The strut cables 11 of the book are suspended below, and each strut cable 11 suspends the suspension.

The membrane material 12 is suspended via a metal fitting 14.

Further, at an intermediate position between each suspension wire 10, a presser cable 1 is provided parallel to the suspension wire 10.
3 is disposed on the membrane material I2, and each suspension wire 10 and Meishin cable 13 are prestressed in advance to one or both of them at their terminal portions, thereby applying tension to the membrane material 12. It gives power.

As shown in FIGS. 1 and 4, the membrane surface made of the membrane material 12 maintains a sufficient curvature between the support points of the strut cables 11 to stabilize the curved surface.
2 and the presser cable 13 are integrated so that the membrane body itself exhibits its own tension resistance system, and the membrane surface as a whole is formed as a low rise curved surface with a small degree of outward bulge, so that it can resist wind. It is constructed to obtain as much negative pressure distribution as possible on the membrane surface when pressure is applied.

In addition, in FIGS. 2 to 5, reference numeral 14 indicates a large beam member that supports both ends of the suspension wire 10, and reference numeral 15 indicates a truss-type stiffener member disposed at both ends of the structure in the longitudinal direction to resist horizontal force. 16 is each suspension wire 10
A horizontal member 17 and an auxiliary pillar 18 are arranged to protrude outward from the pillar 16, and a first reinforcing wire 19 and a second reinforcing wire 20 are arranged thereon. 4 to form a truss as shown in FIG.

In addition, as shown in FIGS. 3 and 5, the presser cable 13
Horizontal members 21 are arranged at both end positions of the column members 16.
horizontal members 2 at the upper and lower ends of and both ends of the holding cable 13
Place materials 22 and 23 are stretched between each space.

Further, as shown in FIG. 5, wire members 24 are stretched between the horizontal members 21 at both ends of the holding cable 13 and the tip of the horizontal member 17.

Furthermore, in this embodiment, sliding means such as wheels (not shown) are attached to both ends of each suspension wire 10 and both ends of the cable 13, and the sliding means slides over the girder 14 and the horizontal member 21. It is capable of sliding in the column direction, and by moving one of the suspension wires 10 at either end in the column direction in the direction of the opposite end in FIG. The suspension wire IO, strut cable 11, membrane material 12, and presser cable 13 move in the same direction, allowing the membrane material 12 to be opened and closed.

In the membrane structure according to this embodiment having such a configuration, in response to the wind pressure that is the dominant load, most of the negative pressure acts on the membrane surface as described above, so the negative pressure acts on the membrane material 12 and Even if unbalanced stress occurs due to deformation of the membrane surface due to local wind pressure, for example, when the holding cable 13 bears the tension,
The stress is absorbed by the tension field formed by the flexible membrane material 12 and the holding cable 13.

Therefore, the wind pressure in the portion where there is a slight positive pressure distribution acts on the suspension wire 10 only as a short-term load via the strut cable 11.

In the conventional frame membrane structure mentioned above, the membrane material is stretched over the top of the frame, so wind pressure is ultimately borne entirely by the frame, regardless of whether it is positive pressure or negative pressure. Therefore, the frame needs a large cross-sectional member that can withstand this, and the mutual connection of the frame members is complicated. However, as described above, in this embodiment, the suspension wire 10 is not connected to the suspension wire 10 or the membrane material. 12, cable 13
It is only necessary to support an extremely lightweight long-term self-weight such as, a certain amount of wind pressure, and short-term loads of snowfall.

In addition, since flexible wire material is used, the load transmitted via the strut cables 11 acts on the suspension wire 10 only as an axial force, and no bending force acts on the suspension wire 10, resulting in high rigidity. It is possible to significantly reduce the weight compared to the above-mentioned conventional example using frame materials.

In addition, as mentioned above, the membrane material I2 is a point support to the suspension wire IO for a light self-weight, and a line support to the cable 13 for a large wind load. It is formed as a rational thing according to the size of.

Further, since the membrane material 12 is suspended from the suspension wire 10 in a minimum number of points, details regarding waterproofing can be simplified.

In addition, since the membrane surface is separated from the suspension wire 10 via the strut cable 11, the exterior has a mechanical design using the suspension wire 10, while the interior has a membrane with sufficient curvature for the ceiling. By arranging the surfaces, a soft and attractive atmosphere unique to the membrane can be obtained, similar to conventional suspension membrane structures or air membrane structures.

Furthermore, since the membrane surface is disposed below the suspension wire 10, construction (attachment of the membrane material 12 to the suspension wire 10) is easier than in conventional frame membrane structures.

In addition, re-tensioning of the membrane surface due to aging or leaping can be easily done at the outer periphery using either or both of the suspension wire 10 and the holding cable 13, similar to the introduction of the initial prestress described above. The vine is
As described above, since the holding cable 13 can also function as a large resistance element against wind pressure, it is structurally extremely rational.

Depending on the design conditions, suspension wire 1.
Instead of zero, it is also possible to use a lightweight beam material such as a single-piece steel pipe.

Furthermore, in the above embodiment, each suspension wire 10
Although an example is shown in which the suspension wires 10 are arranged parallel to each other, it is also possible to arrange the suspension wires 10 approximately radially from each other, as in the embodiments shown in FIGS. 6 and 7. In this case, the cable 13 may be placed in the same direction as the suspension wire 10 at an intermediate position between the suspension wires.

In the embodiment shown in FIGS. 7(a) and 7(b), a central ring 30 is arranged at the center, and the ends of each suspension wire 10 and presser cable 13 on the central side are connected to the central ring. It is connected to 30.

In addition, in this embodiment, instead of the first reinforcing wire 19 and the second reinforcing wire 20 shown in the first embodiment described above, the outer peripheral side ends of each suspension wire 10 and the holding cable 13 are compression ring 31 and a second compression ring 32, each compression ring 31.
Each suspension wire 1 with a compressive strength of 32
It is constructed so as to maintain a balance system with the tensile forces acting from the cable 0 and the holding cable 13.

That is, this embodiment utilizes an endless compression ring, 31.32, taking advantage of the fact that it is a planar circular building. It is also possible to use external pack tie material.

However, the present invention is not limited to the above-mentioned embodiments, and the spacing and span between each suspension wire 10,
It goes without saying that various modifications are possible without departing from the gist of the present invention, such as the number of strut cables arranged, etc., which can be changed as appropriate depending on design conditions.

(Effects of the Invention) The present invention is configured as described above, and includes suspension members arranged approximately parallel or radially, and membranes suspended downward from multiple locations of each suspension member by wire members. The structure has wind resistance as a lightweight structure. The performance can be expected mainly from the membrane body consisting of the membrane material and the holding cable, and the tension resistance of the membrane body that the membrane structure should have is fully exhibited.

In addition, all loads from the bottom act on the suspension material only as axial force, and no bending force acts on the suspension material, resulting in a rational structure, compared to the conventional example above that uses highly rigid frame materials. This can help make your body feel lighter as a whole.

4. Detailed Description of the Invention FIGS. 1 to 5 show an embodiment of the present invention, FIG. 1 is a perspective view of essential parts showing one configuration 111 of the membrane structure according to this embodiment, and FIG. 2 3 is a side view of FIG. 2, FIG. 4 is a sectional view taken along line 8-Δ, and FIG. 5 shows the planar configuration of the membrane material. 6 and 7(a) are conceptual diagrams showing other embodiments of the present invention, and FIG. 7(b) is a sectional view of FIG. 7(a), and FIG.
The figure is a conceptual diagram showing an example of a conventional framework membrane structure.

IO... Suspension material (suspension wire), 11... Wire material (strut cable), 12...
Membrane material, 13... Holding cable.

Special fraud applicant Kimio Saito (2 others) Agent Patent attorney Hiroshi Fujiwara 2 Figure 6 Figure 7 (G) (b) Teku 15 Neyama Seisho (spontaneous) 1986 Patent Application No. No. 293221 No. 2, Name of the invention Hanger type suspension membrane structure 3, Consideration for amendment = + <Relationship with the matter Patent application Persons Place
4-11-13 Harayama, Urawa City, Saitama Prefecture Name Kimio Saito (2 others) 4, Agent

Claims (1)

[Claims] Each suspension member is arranged substantially parallel or radially, a membrane member is suspended downward from a plurality of locations of each suspension member by wire members, and each suspension member is arranged at an intermediate position between each of the suspension members. 1. A hanger type suspension membrane structure comprising a holding cable disposed on the membrane material in the same direction and applying tension to the membrane material.