天津国家会展中心展览大厅凹形四弦桁架结构分析及方案比选

Mechanical property analysis and structural form selection for exhibition hall of National Convention and Exhibition Center

对天津国家会展中心展览大厅凹形四弦桁架结构特点进行了详细分析介绍,对凹形四弦桁架结构进行了详细的静、动力特性及地震作用参与组合下的结构内力分析,得到了结构杆件的内力分布情况、凹形四弦桁架结构的刚度分布及人字柱柱脚支座受力特点.同时针对国家会展中心展览大厅进行了结构方案比选,在柱子形式及约束等一致的前提下,针对屋盖结构分别进行不同结构体系与凹形四弦桁架结构体系的对比分析,得出不同结构体系的受力特点及经济效益上的优缺点.对凹形四弦桁架柱的结构性能有了全面了解,为工程的实施提供了参考依据.

This paper provides a thorough analysis for the concave four-chord truss structure used in the exhibition hall of Tianjin National Exhibition and Convention Center. Thorough structural analysis under load-cases comprised of static, dynamic and seismic loads, internal force distribution of structural bars, stiffness distribution of the truss structure and mechanical properties of herringbone column supports are obtained. Besides, comparison and selection of structural schemes for the exhibition hall are conducted. Through comparative analysis for different plans of the roof structure including concave four-chord truss and other structures with identical columm form and constraint, mechanical behaviors and economical performances of different structure systems are obtained. This paper builds a complete understanding for the structural behavior of the concave four-chord truss and provides reference for future engineering practice.