Beam string structure with high progressive collapse resistance performance and implementation method of beam string structure

Abstract

The invention discloses a beam string structure with high progressive collapse resistance performance and an implementation method of beam string structure. The beam string structure involves an upperbeam string and a lower inhaul cable, wherein a plurality of first joints are arranged on the upper beam string, a plurality of second joints are arranged on the lower inhaul cable, a plurality of third joints are arranged in the space between the upper beam string and the lower inhaul cable, four inclined supporting rods are arranged on each third joint, and the four inclined supporting rods areconnected to the two adjacent first joints on the upper beam string and the two adjacent second joints on the lower inhaul cable correspondingly. Compared with a traditional beam string structure, the beam string structure forms a standby force transmission path through the inclined supporting rods after the cable is broken, the structure can be effectively prevented from collapsing, meanwhile the supporting rod redundancy is increased, a prestress clamp at each second joint can effectively control the prestress loss of the lower inhaul cable in the service period, and the beam string structure with the high progressive collapse resistance performance and the implementation method of the beam string structure are simple in structure, easy to implement and suitable for being applied to practical engineering.

Description

technical field [0001] The invention belongs to the field of large-span prestressed space structures, and relates to a tension string beam structure. Background technique [0002] The string beam structure is mainly composed of lower flexible cables and rigid upper string beams. The cables are prestressed and anchored at both ends of the upper string beams. The stay cables and the upper string beams are connected by vertical struts. This structure is a self-balancing system. , can give full play to the tensile performance of high-strength materials, and has the characteristics of reasonable mechanical performance, light weight and simple structure. With the development of my country's construction industry, string beam structures are widely used in important public buildings with large spaces such as stadiums and exhibition halls. [0003] Compared with the frame structure, the string beam structure has lower redundancy. In the prior art, a single vertical strut is often a...

AI Technical Summary

Problems solved by technology

For the tension beam structure system whose upper chord is a solid web beam, when the large-span solid web beam is stressed alone, the bending efficiency is low, and collapse is very easy to occur at this time

As for the string beams that use multiple cables to improve the structural redundancy, the self-balancing force of the whole span cannot be formed after the failure of a single cable, and continuous failure may still occur when the bending resistance of the upper string beam is insufficient.

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