(同济大学土木工程学院 上海 200092)
【提要】 基于初始状态确定理论，针对郑州国际会展中心钢屋盖的矩形单元，借助ANSYS软件，研究了预张力对结构的静力、动力和稳定性能的影响，考察内容包括整体刚度、受力分布、自振特性、稳定安全系数以及屈曲模态等。认为预张力的静力效应可以按照线性理论进行设计，预张力对动力性能的影响不大，对于稳定性能的影响要兼顾多方面的考虑。为斜拉索拱体系在初始状态下的预张力取值提供了设计依据。
【关键词】 斜拉索拱 初始状态 预张力影响 设计建议
Influence Analysis of Pretensions on Mechanical Performances of Spatial Cablehybriad Structure in a Conference Exhibition Center/Ren Junchao,Zhang Qilin(School of Civil Engineering,Tongji University,Shanghai 200092,China)
Abstract:Based on the determination theory of initial configuration， the effects of pretensions on the static,dynamic and stable structural performances of a rectangular unit of steel roof in Zhengzhou International Conference Exhibition Center of stayed pretensions cablearch are analyzed by using ANSYS,including the stiffness,force distribution,selfvib
ration properties,stability safety coefficients and buckling shapes,etc. The results indicate that pretensions static effects can be designed according to linear theory and the influences of pretensions on dynamic performances may be ignored. Some factors should be taken into account when analyzing the influences of pretensions on stable performances. The result proposes the design basis for the cablearch structures.
Keywords:stayed cablearch; initial configuration,pretension effects; design suggestion