JPH0485465A - Suspension film structure and its construction - Google Patents

Abstract

PURPOSE:To control the deformation of film with external loads as well as raise the safety of the film and reduce the tension of the film by a method in which cables are tensely placed to form several sections, and the sections are covered with a film. CONSTITUTION:Grid cables 4 are tensely placed through connectors between struts 1 and 2 to form sections 5 between the surrounding cable 3 and the cables 4. The adjacent cables 4 are connected, and connecting cables 6 are tensely placed. Afterwards, films 7 are placed over the main cable 3 to make up sections 5 and given grid cables 4 to cover the sections 5. Reinforcing cables 8 are placed between struts 1 and 2 in such a way as to lift up the central part of the downside of the films 7. Since great tension is loaded on the cables 4 and 6, the tension of the films 7 can be greatly reduced.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a suspension membrane structure and a method for constructing the same, and more particularly, to a suspension membrane structure applied to a relatively large-scale structure such as the roof of a stadium. Regarding the body and its construction method.

(Prior Art) This type of suspension membrane structure utilizes the tensile strength of the membrane material to be stretched, and in the past, in order to obtain a membrane structure with a desired external shape, for example, a suspension membrane structure was constructed by standing on the ground. Either a membrane material pre-formed in a predetermined shape is stretched between the installed pillars, or a hanging cable or holding cable is used because the tensile strength of the membrane material itself has a certain limit. It has been reinforced as appropriate.

(Problem to be solved by the invention) However, since the above conventional structure uses a membrane material to stabilize the structure itself, if the membrane material were to break, the entire structure would become unstable. The situation was extremely dangerous.

Even if the membrane material is reinforced with, for example, suspension cables in order to solve this problem, it is insufficient to reduce the tension applied to the membrane itself, especially in large-scale structures such as the roof of a stadium. However, this inconvenience becomes noticeable and the scope of application is limited to a certain scale, which is a fatal problem.

Moreover, when an external load or the like is applied to the membrane material, a large tension is generated in the membrane material, and the amount of deformation caused in the membrane material itself is also very large.

Therefore, the present invention has been made to solve the above problems, and it improves the stability of the membrane structure, reduces the tension borne by the stretched membrane itself, and prevents the membrane itself from being damaged by external loads etc. The objective is to suppress the amount of deformation that occurs.

(Means for Solving the Problems) That is, in order to solve the above problems, the present invention has a plurality of partition screens 5 formed by stretching a plurality of cables 4,
Moreover, it is a suspension membrane structure in which a membrane material 7 is stretched between the cables 4 to cover the divisional surfaces 5.

In addition, predetermined cables 4 forming the 5 rivers of each section...
A connecting cable 6 may be stretched between them.

Furthermore, the present invention involves stretching a plurality of cables 4 between supports in order to form partitions 5 between the cables 4, and then appropriately arranging reinforcing cables 8 between the cables 4. This is a method of constructing a suspension membrane structure in which a membrane material 7 is stretched to cover the partition surfaces 5.

It's a method.

(Function) Therefore, in the suspension membrane structure characterized by the above configuration, the membrane material 7 is stretched over the partition surface 5 which is formed by stretching a plurality of cables 4. In other words, since the membrane material 7 is stretched over the divided surfaces 5 divided into desired shapes, the membrane tension applied to the membrane material 7 is borne by the cables 4. The tension of the membrane material 7 can be significantly reduced.

Moreover, even if an external load or the like is applied to the membrane materials 7 that are stretched in such a manner, the influence on the other membrane materials 7 is small, and the amount of deformation thereof can be reduced.

Furthermore, by stretching the connecting cables 6 between predetermined cables 4, the tension of the cables 4 can be reduced, and the membrane tension and the amount of deformation caused by the membrane material 7 can be further reduced. It is possible to reduce it.

It is.

(Example) An example of the present invention will be described below with reference to the drawings.

As shown in Fig. 1, first, a main column 1 is erected in the center, and auxiliary columns 2 are erected on the ground in a substantially rectangular shape around the column 1, and then between the columns 2... The peripheral cables 3 are stretched through connecting members (not shown).

Next, the grid cables 4 are strung between the pillars 1 and 2 via connecting members (not shown).

As a result, a plurality of partitioned screens 5 are formed between the peripheral cable 3 and the grid cable 4, and the partitioned screens 5...
may be divided and formed into predetermined sizes taking into consideration the tensile strength of the membrane material, etc.

Furthermore, after connecting the adjacent grid cables 4, 4 and stretching the connecting cable 6..., the membrane material 7... is stretched over the main cable 3 and the predetermined grid cable 4 that constitute the divisional screen 5... This covers each section screen 5. After that, the reinforcing cable 8 is connected to the membrane material 7 between the pillar 1 and the pillar 2.
Stretch it so that approximately the center of the bottom surface of the frame is lifted upward.

As a result, the construction of the suspension membrane structure is completed, the erection of columns 1 and 2, the tensioning of each cable at 3°4.8,
The series of operations for stretching the membrane material 7 is not very complicated and has the advantage that it can be easily applied to large-scale membrane structures.

In addition, since such a suspension membrane structure is formed by forming a plurality of divisional surfaces 5 with grid cables 4, a large tension is borne by the grid cables 4 and connecting cables 6, and each membrane material 7...It becomes possible to significantly reduce the tension applied to itself.

As a result, even when constructing a relatively large-scale membrane structure, the work of tensioning the membrane material 7 can be carried out without difficulty, and the grid cables 4 can be appropriately stretched to ensure that the membrane material 7 has an allowable tension. Forming a plurality of divisional screens 5 within the strength limit,
A stable membrane structure having a desired external shape can be easily obtained.

Become.

In addition, in this embodiment, since the connecting cables 6 are stretched between the predetermined grid cables 4, it is possible to reduce the tension generated when the membrane structure receives an external load, etc.
Moreover, this has the advantage that the amount of deformation occurring in the membrane material 7 itself can be significantly suppressed.

Incidentally, the shape of the membrane structure is by no means limited to the above-mentioned embodiment, and can also be applied to a membrane structure as shown in FIG. 2, for example.

That is, in the same figure, a support 1 is erected on the ground, and the support 1 is
...between and the surrounding fixed boundary 10 between the pillar 1 and the concrete pillar etc.
In between, there is a hanging cable 9. A plurality of divisional screens 5 are formed by stretching the grid cables 4, and further by stretching the connecting cables 6, grid cables 4, etc., the divisional screens 5 are formed.
The membrane material 7... is stretched over the membrane material 7..., and the reinforcing cable 8 is attached to the bottom of the membrane material 7...
...is stretched appropriately.

It is suspended.

In this way, the present invention can be widely applied to membrane structures having various shapes, regardless of the specific form of the membrane structure.

Further, the shape of the partitioned surface 5 formed by stretching the grid cable 4 and the like is not limited to a planar shape, and it is of course possible to form a curved surface having a bent portion in a part.

Furthermore, the membrane material 7 does not need to be stretched for each divisional surface 5 formed by each grid cable 4, etc., and the membrane material 7 used
The membrane material 7 may be stretched to cover a plurality of partition surfaces 5 while taking into consideration the tensile strength and the like.

In addition, in this embodiment, since the connecting cables 6 are stretched between the grid cables 4, a desirable advantage is obtained in that the membrane structure as a whole can be reinforced. In this case, connecting cable 6
There is no need to stretch the presser cable 8 or the like.

In addition, the material of the membrane material 7 and the like can be changed as desired within the scope of the present invention.

(Effects of the Invention) As described above, the present invention is to stretch a plurality of cables to form a plurality of partitioned surfaces, and to stretch a membrane material between the cables to cover the partitioned surfaces. In addition, the cables bear a large amount of tension, compared to conventional methods in which the membrane material was simply stretched between the struts using only the membrane tension, or in which reinforcement cables were centrally installed. This resulted in a special effect in that it became possible to significantly reduce the tension applied to the membrane material itself. This is extremely effective, especially for large-scale structures.

In addition, because the membrane material is stretched between each cable, the stability of the membrane structure is increased, and the unique effect is that the amount of deformation of the membrane material caused by external loads can be greatly suppressed. It will be played.

Furthermore, if the connecting cable is stretched between predetermined cables, there is an advantage that the tension applied to the membrane material and the amount of deformation thereof can be further reduced.

In addition, since the present invention can be carried out by simply stretching the cables to the support and stretching the membrane material between the cables, the series of operations does not become complicated, and relatively large-scale membrane structures can be constructed. It also has the effect of being easily applicable.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, in which FIG. 1A is a perspective view and FIG. 1B is a front view showing the internal structure. FIG. 2 shows another embodiment; FIG. 2(A) is a plan view, FIG. 2(0) is a front view showing the internal structure, and FIG. 2(C) is an enlarged perspective view of main parts. 4... Cable 5... Division screen 6... Connecting cable 7... Membrane material 8... Reinforcement cable

Claims (1)

[Claims] 1. A plurality of partitioned screens 5 are formed by stretching a plurality of cables 4, and a membrane material 7 is stretched between the cables 4 to cover the partitioned screens 5. A suspension membrane structure comprising: 2. The suspension membrane structure according to claim 1, wherein a connecting cable 6 is stretched between predetermined cables 4 forming each of the partition surfaces 5. 3. After stretching a plurality of cables 4 between the supports to form a partition 5 between the cables 4, the cables 4...
A method of constructing a suspension membrane structure, which comprises appropriately arranging reinforcing cables 8 between them, and stretching a membrane material 7 to cover the partition surfaces 5.