JPH01207577A - Hanger type suspension film structural body - Google Patents

Abstract

PURPOSE:To permit the tension resistance of a film body to be developed sufficiently and reduce the weight of the structural body and improve the structural safety by constituting the titled body from a film member, suspension member, tension ring, suspension string, and a pressing cable. CONSTITUTION:A film structure body is constituted of a film member 11, suspension wire 12 arranged and fixed on the film member 11. tension ring 13 for connecting the outer edge parts of the suspension wire 12 in endless form, suspension string 14 for connecting the outer edge part of the wire 12 and the vicinity of the upper edge of a pillar body 17, and a pressing cable 15 arranged at the intermediate position of the wire 12. The windproof performance as a lightweight structure is improved by the film body consisting of the film member 11 and the pressing cable 15, and the weight is reduced by the wire 12 and the string 14. Further, the structural safety can be improved by connecting the wire 12 and the edge part of the string 14 by the tension ring 13.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is suitable for buildings with relatively large spans. Concerning a new composite membrane structure.

(Prior Art and Problems to be Solved by the Invention) At present, there are 11 types of membrane structures that are generally used: air membrane structure, suspension membrane structure, and frame membrane + M structure.

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 is possible to enhance the wind resistance performance.

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

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

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 described in 11; In the case of the Yuki pillar type, a large continuous space can be obtained.

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 the Qj-arch type, there is also a problem that the stability of the arch deteriorates due to unbalanced tension distribution on both sides of the arch, making it difficult to obtain independence of the support frame.

Next, FIG. 12 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 1 such as a three-dimensional truss via a secondary member 2.

In this frame-type membrane structure, the frame is highly self-supporting and forms a free curved shape, giving it features such as 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. 12, the wind pressure applied to the membrane surface is Since the load is borne by the frame 1 via the point support, it is difficult to expect sufficient strength.In addition, when using a line support method along the frame 1, it is difficult to maintain the shape of the membrane surface and prevent deformation contact. In order to provide the structure, the secondary member 2 described above is required, making it difficult to obtain economic efficiency for the shade and frame material.Furthermore, the membrane material 3 is small in size and curvature as a structural membrane, and is rather made of a light-transmitting material such as glass or acrylic. As a finishing material, it only has the function of covering the frame 1 as a structural material, and there is a problem in that it is difficult to say that the tension resistance system by the membrane surface that the membrane structure should originally have is fully demonstrated. .

Furthermore, since the frame 1 is located under 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 has been developed in response to the above-mentioned conventional problems, and provides a hanger-type Svenge EJ membrane structure based on a novel composite membrane structure, which combines the advantages of each of the above-mentioned membrane structures. The purpose is to

(Means for Solving the Problems) -1- [In order to achieve the first objective, the hanger type suspension membrane structure according to the present invention includes a membrane material, and the membrane material is arranged in a line below the road or in a substantially radial direction. each suspension member arranged and fixed thereon, a tension ring that endlessly connects the outer end of each of the suspension members, and a tension ring arranged at the outer end of each of the suspension members and its outer periphery at the position of the tension ring. +i? f) A holding cable is provided on the membrane material in the same direction as each suspension material at an intermediate position between the respective suspension materials, and applies tension to the membrane material. be.

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

1 to 4 show an embodiment of the present invention, FIG. 1 is a schematic perspective view of a hanger type suspension membrane structure according to the present embodiment, FIG. 2 is a plan view of the membrane structure, and FIG. Figure 3 is the second
It is a sectional view taken along the line Δ-Δ in the figure.

As schematically shown in FIG. 1, the suspension membrane structure IO according to this embodiment includes a membrane material 11, a suspension wire 12 as a suspension material, a tension ring 13, a lifting string 14, and a presser cable 15. It is equipped with the following.

Therefore, the suspension membrane structure 10 according to this embodiment
has a circular shape on a plane, and a central ring 16 is disposed at the center of the roof, and columns 17 as supporting members are disposed at predetermined intervals on the outer periphery. A first compression ring 18 and a second compression ring 19 that connect each column 17 in an endless circular shape are disposed at the upper end and middle portion of the column.

The membrane material 11 is stretched from the +3ij center ring 16 to the second compression ring 19.

Further, the suspension wires 10 are arranged radially at predetermined intervals at 11; ing.

Furthermore, the inner end of each suspension wire IO is connected to the central ring 16 shown in O1j, and the outer end of each suspension wire IO is connected to the tension ring 13.

The tension ring 13 connects the outer ends of each of the suspension wires 1]5j in an endless manner, and has a +1
ii) It is fixed to the membrane material 11'' concentrically with the center ring 16.

The lifting strings 14 are disposed in the extending direction of the outer ends of each of the suspension wires 10, and the inner ends of the lifting strings 14 are connected to the tension ring 13, and the outer ends thereof are connected to the tension ring 13. is connected to the upper end of each column 17 at the position of the first compression ring 18.

Further, the six-holding cable 15 is disposed on the membrane +1 in the same direction as each suspension wire 12 at an intermediate position between the suspension wires 12, and its inner end is connected to the center ring 16. At the same time, the outer end portion is connected to each column 17 at the position of the second compression ring 19 .

In addition, 20 in the figure is a bridge cable, and in order to ensure tension at the outer periphery of the membrane material 11, it is constructed from the tension ring 13 to the second compression ring 19 at the same position as each lifting string 14 on a plane. There is.

In this embodiment having such a configuration, after construction and assembly of each of the above-mentioned members, one or both of the lifting string 14 and the holding cable 15 is tensioned by a predetermined tensioning means, so that the lifting string 14 is tightened.
, a predetermined tension is introduced into the membrane material 11 by the action of the holding cable 15 and the ridge cable 20.

Therefore, the film surface made of the film material 11 is as shown in FIGS. 1 and 33.
As shown in the figure, sufficient curvature is maintained from the second compression ring 19 to the tension ring 13 and the center ring 16 to stabilize the curved surface, and the membrane material 11 and the holding cable 15
It is constructed so that the tension resistance system of the membrane body itself is exhibited, and the membrane surface as a whole is formed as a low rise curved surface with a small degree of outward bulge, and when wind pressure is applied. It is constructed to obtain an additional negative pressure distribution on the membrane surface.

Therefore, in the hanger type three-layer membrane structure according to this embodiment, against the wind pressure which is the dominant load,
As described above, since most of the negative pressure acts on the membrane surface, the negative pressure is applied to the membrane material 11, the holding cable 15, and the ridge cable 2.
Even if an unbalanced stress occurs due to deformation of the membrane surface due to local wind pressure, for example, the stress is absorbed by the tension field made up of the flexible membrane material 12 and the holding cable 15.

Therefore, the wind pressure and the snow load in the portions where the suspension wire 12 and the hanging TX hanging string 14 have a somewhat positive pressure distribution act only as short-term loads.

In the conventional frame membrane structure mentioned above, the membrane material was stretched on 17 sides of the frame, so the wind pressure was positive pressure, 1'l rt
Regardless of E, all the burden is ultimately borne by the frame, and therefore, the frame requires large cross-sectional members that can withstand this burden, and the connection of the frame members to each other becomes complicated. In this embodiment, the lifting string 1 is
4 is a suspension wire 12 and a membrane material 11. It is only necessary to support the extremely lightweight long-term dead weight of the tension ring 13, holding cable 15, etc., as well as a certain amount of wind pressure and short-term load of snow accumulation.

In addition, since flexible wire material is used, all the transmitted load acts on the suspension wire 12 only as an axial force, and no bending force acts on it. It is possible to significantly reduce the weight compared to the conventional example.

In addition, the appearance has a mechanical design with suspension wire 12, suspension string 14, tensicon ring 13, ridge cable 20, etc.
The interior has a membrane surface with sufficient curvature on the ceiling, creating a soft and attractive atmosphere unique to membranes, similar to conventional suspension membrane structures or air membrane structures.

In addition, 11 tension on the membrane surface due to aging or leaping,
7, -+, similar to the introduction of the initial prestress described in l1.
This can be easily carried out on the outer periphery using either or both of the double string 14 and the holding cable 15, but as mentioned above, the holding cable 15 also functions as a large resistance element against wind pressure. Therefore, it is structurally extremely rational.

Furthermore, in this embodiment, the tensicon ring 13, the lifting string 14, the first compression ring 18, and the second compression ring 19 maintain a balance of forces within the structural system as shown in FIG. The method can be secured, and the column 1
Since 1110 mm force does not act on 7, the burden is reduced and the economical design becomes 11 force.

In addition, since each suspension wire 12 and the hanging string 14 are connected endlessly by the tension ring 13, eccentric loads can be prevented, such as when localized snow is concentrated on a part of the roof surface. Even if the stress is applied, the stress can be dispersed by the action of the tensicon ring 13 and applied to each suspension wire 12 and the suspension wire string 14, improving structural safety.
can be made to

Next, FIGS. 5 and 6 show a second embodiment of the present invention, and a suspension membrane structure 30 according to the present embodiment is shown in FIGS.
In this case, a horizontal member 31 is arranged to protrude outward from an intermediate position of each column 17, and a horizontal member 31 611 is arranged from the upper end of each column 17.
It is characterized in that a first pack stay material 32 is stretched from the tip of the horizontal member 31 to an anchor 34 formed on the ground. is the same as the first embodiment, and the same components are given the same reference numerals and their explanations will be omitted.

Note that 35 in the figure is a viewing facility provided within the structure.

Therefore, in this embodiment, as shown in FIG. 7, a force balance system is ensured by the suspension string 14, the tension ring 13, and the first and second pack stay members 32 and 33. , the same effects as in the first embodiment can be achieved.

Further, FIGS. 8 to 11 show a third embodiment of the present invention, and FIGS. 10 and 11 show C in each of FIGS.
-C line and DD line sectional views.

The suspension three-way membrane structure 40 according to this embodiment has 1'-circular dome-shaped portions 41 disposed at both ends connected by an arch-shaped portion 42 at the center. This is an example in which the present invention is applied to a structure that covers a so-called track-shaped soil surface.
1) For convenience, such a planar shape will also be referred to as an ellipse.

Thus, this embodiment is an example in which a configuration similar to that of the second embodiment is applied to the elliptical dome 40, and the configuration of the central arched portion 42 is somewhat different from the second embodiment.

That is, in this embodiment, the center ring 43 and the tensicon ring 44 are each formed in an elliptical shape corresponding to the shape of the elliptical dome 40, and the arched portion 4
2, each suspension wire 12 is connected to a central ring 43, but is not separated by the central ring 43, and is connected to a tension ring 44 on one side facing each other as shown in the figure.
It is continuously constructed from the tension ring 44 on the other side.

The other configurations are the same as those of the second embodiment,
Identical components are given the same reference numerals and their explanations will be omitted.

Therefore, this embodiment also achieves the same effects as those of the first embodiment.

Note that depending on the design conditions, the suspension wire 10 and the lifting string 14 may be replaced with 111. in each of the above embodiments. -It is also possible to use light beam materials such as steel pipes.

Furthermore, it goes without saying that the present invention is not limited to the above embodiments, and that various applications are possible without departing from the gist of the present invention.

(Effects of the Invention) The present invention is configured as a series, and includes a membrane material, each suspension material arranged and fixed in a substantially horizontal or radial manner, and each suspension member arranged and fixed in a substantially radial manner. 3. A tension ring that endlessly connects the outer ends of the suspension members, and one end of the support member disposed at the outer end of each suspension member and its outer periphery at the position of the tension ring. and a holding cable disposed on the membrane material in the same direction as each suspension material at an intermediate position between each of the suspension materials and applying tension to the membrane material. As a result, the wind resistance performance as a structure 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, which the membrane structure should originally have, can be fully exhibited.

In addition, for suspension materials and lifting strings,
Since all loads from the bottom act only as axial force and no bending force acts at all, this is a rational structural form and uses highly rigid frame materials. This allows weight reduction.

Furthermore, by endlessly connecting the suspension material and the tension ring at the end of the lifting string, the structural safety of the membrane structure when local eccentric loads are applied can be greatly improved. , it can produce various beneficial effects.

4. Detailed Description of the Invention FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 is a schematic perspective view of a hanger-type suspension membrane structure according to this embodiment, and FIG. 2 is a schematic perspective view of the membrane structure. Plan view of the structure, Figure 3 is the second
The cross-sectional view taken along the line Δ-Δ in the figure and FIG. 4 are diagrams showing the structural principle of this embodiment.

5 to 7 show a second embodiment of the present invention, and FIG.
FIG. 6 is a top view of the η structure, FIG. 6 is a sectional view taken along line B-13 in FIG. 5, and FIG. 7 is a diagram showing the structural principle of this embodiment.

8 to 11 show a third embodiment of the present invention;
The figure shows a hanger-type suspension membrane h'/
Figure 9 is a schematic perspective view of the membrane structure, Figures 1O and 11 are respectively C-C!3i1 of Figure 9.
and a sectional view taken along line D-D.

FIG. 12 is a conceptual diagram showing an example of a conventional skeleton membrane structure.

10.30.40...Hanger type suspension membrane structure, +1...Membrane material, 12...Suspension membrane (suspension wire), 1:3...Tension ring, 14...Lifting String, 15... Presser cable, 16... Center ring, 17... Pillar body, 18... First compression ring, 19... Second compression ring, 20... Azalea cable; 31 ...Horizontal material, 32.33...Paxti material.

Claims (1)

[Claims] A membrane material, each suspension material disposed and fixed approximately parallel or radially on the membrane material, a tension ring endlessly connecting the outer end of each suspension material, and at the position of the tension ring. a lifting string connecting the outer end of each of the suspension members and the vicinity of the upper end of a support member disposed on the outer periphery thereof; and a lifting string disposed on the membrane material in the same direction as each suspension member at an intermediate position between the suspension members. 1. A hanger-type suspension membrane structure, comprising: a holding cable for applying tension to the membrane material.