Construction method for improving cable dome performance

Abstract

The invention relates to a design method for a tension structure of a cable dome, in particular to a method for improving the stress and service performance of a cable dome. The method includes the following steps: firstly, in the design calculation and analysis, the ring cable is regarded as a single cable, and the prestressed design value of the ring cable and the cross-sectional area of ​​the ring cable are determined; secondly, the cross-sectional area of ​​the ring cable is divided into two or more on average, And determine a certain arrangement method to arrange into a specific combination; again, in the numerical simulation calculation, input the arrangement relationship between the cables in the ring cable into the calculation model according to the actual position, and connect the ring cable with other structural components position, use rigid connections such as beam units or truss structures to connect all the ring cable nodes here or couple the degree of freedom coupling of all the ring cable nodes here to simulate the clamping effect of the cable clamp; then, according to the numerical simulation calculation results, compare the selected Finally, according to the combined cross-sectional shape of the selected arrangement, the cable clamp is designed. This design method can effectively solve the problem of low safety performance of large deformation ductility of the cable dome system under asymmetric loads.

Description

technical field [0001] The invention relates to a design method for a tension structure of a cable dome, in particular to a method for improving the stress and service performance of a cable dome. Background technique [0002] The cable dome structure has reasonable force characteristics and high structural efficiency, and is a modern structural system that best reflects the advanced materials, design and construction technology of contemporary buildings. The main structure of the cable dome can be divided into four parts: a continuous tension cable network composed of notches, oblique cables, and ring cables, compression struts, a central tension ring, and peripheral compression ring trusses or ring beams. The cord-membrane substructure consists of a membrane tensioned over the notochords and cord valleys disposed between the radial notochords. The application of prestress makes the cable dome evolve from a mechanism to a structure that can bear the design load, so the ten...

AI Technical Summary

Problems solved by technology

[0003] Generally, the ring cables of the cable dome are all single cables, or they are changed to multiple cables because the section of the single cable is too large, and the performance research and analysis of the multi-cable dome have not been carried out.

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