CN209855018U

CN209855018U - Annular cable supporting structure and suspended dome

Info

Publication number: CN209855018U
Application number: CN201822202588.5U
Authority: CN
Inventors: 黄卓驹; 李璐
Original assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Current assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2019-12-27
Anticipated expiration: 2028-12-26

Abstract

The utility model relates to an annular cable bearing structure and string dome, annular cable bearing structure includes twice lasso and multichannel halyard, at least twice lasso is vertical to be arranged side by side, lasso and halyard pass through the cable clip nodal connection, the cable clip node is connected with the vaulting pole, the cable clip node sets up in different positions according to ring cable power, halyard cable power and cable head size including disconnected type cable clip and through type cable clip. Compared with the prior art, the utility model has the advantages of the length of the ring cable is equal with the cable force on average, the node structure of the cable clamp is simple, the dead weight is small, etc.

Description

Annular cable supporting structure and suspended dome

Technical Field

The utility model belongs to the technical field of building structure technique and specifically relates to a supporting structure and string dome are suggeste to annular cable.

Background

The annular cable structure is a space structure system which utilizes radial cables and annular cables to provide structural rigidity through pretension to bear vertical load. Typical annular cable structures include cable trusses, suspended domes, annular beam strings and the like, and are a common spatial structure system. Taking a string-supported dome as an example, the string-supported dome structure consists of a single-layer latticed shell, a stay bar, a ring cable and an inclined cable, wherein the upper end of the stay bar is connected with a rigid single-layer latticed shell node, and the lower end of the stay bar is connected with the intersection point of the ring cable and the inclined cable; one end of the inclined cable is connected with the lower end of the stay bar, and the other end of the inclined cable is connected with the upper end of the stay bar corresponding to the next circle of ring cable; the lower ends of the same ring stay bar are connected together through a ring cable. Under the vertical load effect, the load is passed through the vaulting pole by upper end individual layer net shell and is transmitted the cable system, behind the cable atress, the cable force increases, produce ascending power, through the vaulting pole reaction on the individual layer net shell, therefore the cable system plays elastic support's effect to the individual layer net shell, help improving the vertical rigidity of individual layer net shell, adjustment individual layer net shell component internal force distributes, outermost circle oblique cable upper end is connected simultaneously and individual layer net shell support position, the individual layer net shell produces outside the field thrust to the support, and the oblique cable produces the pulling force to the support in the field, the cable system helps reducing the horizontal thrust of individual layer net shell to the support. The suspended dome is reasonable in stress, high in force transmission efficiency, light in dead weight, high in vertical rigidity and good in indoor impression, can span a span larger than a single-layer latticed shell, and is widely applied to a large and medium span stadium roof structure.

In the annular cable structure, along with the increase of span, need to keep sufficient structural rigidity, the annular cable pulling force that needs bigger, corresponding cable cross-section is also bigger. Because the probability that multichannel cable broke simultaneously is less than the cable probability of breaking of one, and minor diameter cable quality guarantees more easily moreover, for improving the structural safety degree, generally adopt two or multichannel cables to form the lasso of annular cable structure. In the prior art, a stay cable is generally horizontally arranged, and the stay cable node is mature. But the obvious shortcoming is that the length of the multi-channel ring cable is different, the cable force is different, and the size and the self weight of the cable clamp are larger, so that the overall efficiency of the structure is reduced; and at the same time, adverse effects are brought to indoor impression, illumination and the like.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a supporting structure for an endless cable, which overcomes the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides an annular cable bearing structure, includes twice ring cable and multichannel halyard, the vertical side by side arrangement of twice ring cable, ring cable and halyard pass through the cable clamp nodal connection, the cable clamp nodal connection is connected with the vaulting pole.

Further, the cable clamp node is a steel casting cable clamp or a forging cable clamp.

Further, the cable clamp node comprises a disconnected cable clamp and a through cable clamp, and the disconnected cable clamp or the through cable clamp is arranged at different positions according to the cable force of the circular cable, the cable force of the inclined cable and the cable head size.

Furthermore, the through type cable clamp is arranged at a position where the included angle of the ring cable is close to 180 degrees, and the disconnected type cable clamp is arranged at a position where the included angle of the ring cable deviates from 180 degrees.

Further, through type cable clamp is including the cable clamp steel casting and the otic placode steel casting that are connected, the cable clamp steel casting includes ring cable connecting portion and oblique cable connecting portion, ring cable connecting portion have the through-hole that is used for passing the ring cable, oblique cable connecting portion are including the opening that is used for connecting the oblique cable, the otic placode steel casting is connected with the vaulting pole.

Further, the cable clamp steel casting and the lug plate steel casting are connected through a high-strength bolt.

Furthermore, the disconnected cable clamp is arranged between the two sections of ring cables and is an integrated steel casting with three openings, the three openings are respectively connected with the inclined cables and the two sections of ring cables, and the middle of the disconnected cable clamp is provided with an opening for connecting the support rod.

The utility model also provides a suspend dome, include annular cable bearing structure, this annular cable bearing structure supports through the vaulting pole and connects rigidity individual layer net shell.

Compared with the prior art, the utility model discloses have with following beneficial effect:

1) the utility model discloses with the vertical arrangement of ring cable, compare with the cable clip that conventional many cable levels were arranged side by side, this kind of cloth cable mode makes ring cable length and cable force on average unanimous.

2) Compared with the prior art, the utility model discloses horizontal dimension, volume and the dead weight of cable clamp node are less.

3) The utility model discloses the cable clamp node is connected with the vaulting pole, can unite two into one cable clamp node and vaulting pole, and the high of cable clamp node is less to the influence of indoor impression, and therefore vertical arrangement's cable clamp performance and visual effect all are superior to the cable clamp that traditional level was arranged side by side.

4) The utility model discloses be provided with disconnected type cable clip and through type cable clip, solve the problem of the unbalanced force of little contained angle polygon ring cable.

Drawings

Fig. 1 is a schematic view of a vertical structure of the through-type cable clamp of the present invention;

fig. 2 is a schematic plan view of the through type cable clamp of the present invention;

fig. 3 is a schematic view of the vertical structure of the disconnected cable clamp of the present invention;

FIG. 4 is a schematic plan view of the disconnected cable clamp of the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a suspended dome;

FIG. 6 is a schematic diagram showing an elevation structure of the suspended dome at the through-type cable clamp in the embodiment;

fig. 7 is a schematic elevation structure view of the suspend dome at the break-away cable clamp in the embodiment.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

The utility model provides an annular cable bearing structure, including twice ring cable and multichannel oblique cable, the ring cable is vertical arranges side by side, and ring cable and oblique cable pass through cable clamp nodal connection, and cable clamp node passes through high strength bolt respectively with ring cable and oblique cable fixed connection to be connected with the vaulting pole. Through the vertical ring cable arrangement mode of arranging side by side, the problem of cable clamp node atress has been solved, is favorable to reducing the cable clamp size, reduces structure weight, promotes indoor impression, makes things convenient for the construction to build. In this embodiment, the looped cable is provided with twice, and the vertical setting of twice looped cable can not show increase node size and dead weight when improving the cable security.

The cable clamp node is a steel casting cable clamp or a forging cable clamp. In this embodiment, the break-away type cable clamp is an integral steel casting, the shape of the steel casting is designed according to the form of the cable head of the inhaul cable, and the through type cable clamp is composed of two steel castings, namely an ear plate steel casting and a cable clamp steel casting.

The cable clamp node comprises a disconnected cable clamp and a through cable clamp, and the disconnected cable clamp or the through cable clamp is arranged at different positions according to the cable force of the annular cable, the cable force of the inclined cable and the size of the cable head. The annular cable structure is initially applied to a large-span roof with a circular plane projection, and then is gradually applied to a roof with a plane projection being symmetrical such as an ellipse, an octagon, a corner cut rectangle and the like, and the annular cable plane projection also derives a plurality of corresponding forms. The inhaul cables can maintain normal working performance only by being tensioned through construction, so that the annular cables between the adjacent cable clamps are straight lines, the annular cables are similar to a curve form which is projected on a plane of a roof through fitting of a plurality of sections of straight lines, and the annular cables on two sides of the cable clamps form a certain included angle, so that the annular cables at the cable clamps generate a certain horizontal unbalanced force. In the construction tensioning process, the unbalanced force among the ring cables can cause cable clamp cable clamping, damage the cable protective layer and even the cable body; in the use process of a building, the cable clamp clamps the ring cable through the tightened high-strength bolt, and the unbalanced force is resisted by utilizing the friction force of the ring cable and the cable clamp. The more cable clamps are, the closer the included angle of the ring cable is to 180 degrees, the smaller the unbalanced force of the ring cable is, the fewer high-strength bolts are needed, the smaller the plane size of the cable clamps is, but the number of the support rods is increased, so that the self weight of the structure is increased. In order to solve the problem of unbalanced force of the small-included-angle polygonal ring cable, the cable clamp of the suspended dome is divided into a through cable clamp and a disconnected cable clamp. When the included angle of the ring cable is close to 180 degrees, a through type cable clamp is adopted; when the included angle of the ring cable deviates 180 degrees, a disconnected cable clamp is adopted, the unbalanced force is balanced by the cable clamp and the inclined cable, and the damage of the cable clamp to the ring cable is avoided.

As shown in fig. 1 and 2, the through type cable clamp includes a cable clamp steel casting 501 and an ear plate steel casting 502 which are connected, the cable clamp steel casting 501 includes a loop cable connecting portion and a stay cable connecting portion, the loop cable connecting portion has a through hole for passing through the loop cable 100, the stay cable connecting portion includes an opening for connecting the stay cable 200, and the ear plate steel casting 502 is connected with the stay bar 300. The cable clamp steel casting 501 and the ear plate steel casting 502 are connected by a high-strength bolt 504. The through type cable clip is also provided with a bottom plate 503

The break-away cable clamp is arranged between the two ring cables, as shown in fig. 3 and 4, the break-away cable clamp is an integrated steel casting 601 with three openings, the three openings are respectively connected with the oblique cable 200 and the two ring cables 100, and the middle part of the break-away cable clamp is provided with an opening for connecting the stay bar 300.

As shown in fig. 1 to 4, the stay 300 includes a stay body, a stiffener 301 provided in the stay body, and an end plate 302 provided at an end of the stay body. The connection mode of the stay bar 300 and the cable clamp node is specifically as follows: for the through type cable clamp, the stay bar 300 is connected with an ear plate steel casting 502 of the through type cable clamp through an ear plate 303 and a pin 304 arranged at the end part; for a breakaway clip, the brace 300 connects to an opening in the middle of the breakaway clip. According to the construction tensioning method, the connecting node of the stay bar and the cable clamp is considered, the stay bar can rotate along the tensioning direction of the inhaul cable, and the upper end node and the lower end node of the stay bar are prevented from being damaged in the tensioning process.

As shown in fig. 5 to 7, the present embodiment further provides a suspended dome, which includes an annular cable support structure, the annular cable support structure includes looped cables 100 and inclined cables 200, two looped cables 100 are arranged vertically side by side, the looped cables 100 and the inclined cables 200 are connected by cable clamp nodes, the whole annular cable support structure is supported and connected by a brace 300 to a rigid single-layer reticulated shell 400, and the rigid single-layer reticulated shell 400 is a suspended dome rigid member. One end of the stay bar 300 is connected with the cable clamp node, and the other end is connected with the rigid single-layer reticulated shell 400 through the ear plate 303 and the pin 304. The through-type cable clip may also be externally coated with a decorative layer 50 for construction.

The suspended dome has the same design process as a conventional suspended dome structure, comprises structural modeling, structural analysis and structural design, and determines the internal force of a cable support system. At this time, the feasibility of construction tensioning needs to be considered, and the connection mode of the upper end node and the lower end node of the brace rod is determined according to a construction tensioning method and the actual engineering situation.

Designing a disconnected cable clamp according to the cable force of the ring cable, the cable force of the oblique cable and the cable head size, carrying out cable clamp stress analysis, determining the size of the cable clamp, and lofting according to actual conditions to determine the vertical spacing of the ring cable. Under the condition of ensuring that the vertical distance of the ring cable is not changed, a through type cable clamp is designed according to the size of a cable head of the inclined cable, the cable force of the ring cable and the cable force of the inclined cable, the stress of the cable clamp is analyzed, and the size of the cable clamp, the grade and the number of the high-strength bolts are determined.

The cable clip is coated with the decorative layer according to the building appearance requirement, so that the structure attractiveness is improved.

Because the structural stress performance requirement and the inhaul cables of different models are provided with different cable heads, and the same ring cable needs to be located at the same elevation, when a through type cable clamp and a disconnected type cable clamp are adopted in the ring cable at the same time, the detailed sizes of the two types of cable clamps influence each other, and the size of the cable clamp needs to consider not only the size of the cable head of the inclined cable but also the size of the cable head of the ring cable so as to avoid the collision of the cable heads. In the structural design level, when only the through type cable clamp is adopted in the same ring cable, the size of the cable clamp needs to be designed according to the cable head of the inclined cable.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides an annular cable bearing structure, its characterized in that includes twice ring cable and multichannel halyard, the vertical side by side arrangement of twice ring cable, ring cable and halyard pass through the cable clip nodal connection, the cable clip node is connected with the vaulting pole, the cable clip node sets up in different positions according to ring cable power, halyard cable power and cable head size disconnected type cable clip or through type cable clip including disconnected type cable clip and through type cable clip.

2. The looped cable support structure of claim 1, wherein the cable clamp node is a cast or forged cable clamp.

3. An endless cable support structure according to claim 1, wherein said through type cable clamp is disposed at an angle close to 180 ° of the endless cable and said break type cable clamp is disposed at an angle offset from 180 ° of the endless cable.

4. An endless cable support structure according to claim 1, wherein the through type cable clamp comprises a connected cable clamp steel casting and an ear plate steel casting, the cable clamp steel casting comprising an endless cable connection having a through hole for passing an endless cable and a stay cable connection comprising an opening for connecting an endless cable, the ear plate steel casting being connected with a stay.

5. An annular cable support structure according to claim 4, wherein the cable clamp steel casting and the lug plate steel casting are connected by high strength bolts.

6. The looped-cable support structure according to claim 1, wherein the breakaway cable clamp is disposed between two looped cables, and is an integrated steel casting having three openings respectively connecting the oblique cable and the two looped cables, and an opening for connecting the stay is provided in the middle of the breakaway cable clamp.

7. A suspended dome comprising the endless cable support structure of claim 1, connected to a rigid single-layer reticulated shell by strut supports.