管桁架—索网混合结构的找形分析

给出钢管桁架和空间索网混合结构的找形分析、模型试验和现场检验结果。首先,采用力密度与有限元相结合的方法对混合结构进行找形分析。其次,对缩尺模型进行测试,以评估锚索系统的不同预应力水平。最后,给出监测不同锚索真实力水平的现场检验结果,并将检验结果和设计值进行对比。研究结果表明,该方法能够成功进行混合结构建筑物设计。

Form-Finding of a Mixed Structure with Cable Nets and Tubular Trusses

This paper presents the main results of the form finding analysis, model testing and on-site investigation on a mixed structure consisting on a system of steel tubular trusses coupled with a spatial cable net. Firstly, the combining method of force density and finite element is proposed for the form finding analysis of the mixed structure. Then, experimental tests are carried out on a scaled model in order to assess the different levels of pretension to be introduced in the cable system. Finally, the result of the on-site assessment activity carried out to monitor the real force level acting on different cables is presented and the comparison between the inspection results and the design target is made. The construction of the mixed structure has been successfully carried out and completed on the basis of the work presented in this paper.