Method for fabricating new type tension chord truss frame in large span

Abstract

This is a method used to produce long span spread chord truss. It contains: To weld the belly rod on the upper spread chord rod, put the formed upper chord rod on the wording platform, fix the two ends of this chord rod on the fixed seat, then connect lower end of the belly rod with cover joint pipe, and between two cover pipes beforehand put a lower chord steel pipe. The steel rope pierce through every joint cover pipe and every lower chord steel pipe, then to spread out the steel rope, on the steel rope at the spreading straight, state weld every lower steel pipe with every joint cover pipe, keep the steel rope spread out straightly, then loose the two ends of the upper chord rod from platform, then long span spread chord truss is finished.

Description

Technical field: [0001] The invention relates to a method for manufacturing a new type of long-span string-tension truss, belonging to the technical field of large-span string-tension roof structures. Background technique: [0002] At present, the most commonly used long-span tension roof structure in the prior art is the tension beam structure. The "tension beam structure" was first proposed by Professor M. Saitoh of the University of Japan in 1984, and it is widely used in Japan. In the roof structure of medium and small spans; in my country's Shanghai Pudong International Airport terminal building, the four large spaces, including the entrance hall, check-in hall, shopping mall and boarding hall, have a span of 49.3m, 82.6m, 44.4m and 54.3m m, all adopt the stringed beam structure; the roof of the Guangzhou International Convention and Exhibition Center built in 2002, with a span of 126m, also adopted the "stringed truss beam" structural system, which filled the gap in Chin...

AI Technical Summary

Problems solved by technology

Although this tension beam structure in the prior art has many advantages, there are still several relatively big problems: 1. The consumption of steel is large, and the manufacturing cost is high; Be careful, it is easy to damage the string beam balance structure of the self-balancing system that has been formed, so it is difficult to hoist; 3. For modern long-span buildings, they are generally light roofs. On the contrary negative pressure, at this time, the tension of the lower cable of the existing string beam is lost, its self-balancing system does not exist, and the safety degree is lost. String beam structures are not suitable for the action of abnormal loads

Due to the above-mentioned problems in the existing string beam structure, its use effect is still not ideal

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