新型张弦网壳组合结构的设计与分析

Design and analysis of a new hybrid structure composed of truss strings and a shell

在鄂尔多斯东胜体育中心综合体育馆展厅结构设计中,提出了在张弦桁架之间设置双层网壳的新结构体系,在满足复杂建筑造型的同时,有效增加了结构的刚度和稳定性.设计了接近实际工程的基本算例,从整体模型入手,全面分析了垂跨比、初始预应力和撑杆数量变化对结构静力性能、动力性能以及用钢量的影响.依据分析结果,对不规则造型的鄂尔多斯东胜体育中心综合体育馆展厅进行设计,其中索的预应力是设计中的难点和关键,本文给出了详尽的调索方法和依据.

A new hybrid structure arranging a double-layer shell between truss strings was proposed in the project-roof design of the Exhibition Center in Erdos Dong-sheng Sports Center.The new structure system not only meets the demand of adapting to an irregular large-span roof,but also increases the structural stiffness and stability.Model examples close to the actual project was designed.The effects of sag-to-span ratio,initial prestresses and the numbers of struts on the static and dynamic behaviors and the steel consumption of the integral structure were fully analyzed by concerning the integrate model.Based on the research result of model examples,the irregular roof of Erdos Dong-sheng Exhibition Center was designed.Besides,the design of the pre-stressed cable is difficult and critical,and a detailed method and the corresponding reference to adjust the pre-stressed cable were provided.