力形结合求解索杆结构自应力模态  

FORCE-FORM ANALYSIS METHOD FOR CALCULATING SELF-STRESSING MODEL OF CABLE-STRUT STRUCTURAL SYSTEM

作　　者：曹国辉 张琴 

机构地区：[1]深圳市电子院设计有限公司,深圳518031 [2]深圳中广核工程设计有限公司,深圳518000

出　　处：《工业建筑》2008年第z1期599-601,共3页Industrial Construction

摘　　要：索杆张力结构是指由索和杆为基本单元,通过施加预应力提供结构刚度的一类空间结构体系。自应力模态是索杆张力结构满足结构自平衡的内力模态,自应力模态的确定是结构后续受力分析及性能研究的基础。提出的力形结合法是在结构初始几何形态的基础上,充分考虑结构的对称性及索受拉、杆受压的特性,依据结构内力自平衡的要求,直接求解出一组自应力模态,该组模态是一组实际可行的杆件内力分布状态。Cable-strut structural system consists of cable and strut,whose rigidity is provided by initial prestress.A self-stress model is the internal force model,by which a cable-strut structure can meet the need of self balance of the structure.Self-stressing model is the basis of analysis for load performance.Based on internal force equilibrium,force-form analysis method is proposed.Taken into account structural symmetry and mechanical performance,this method can straightly calculate one self-stressing model.

关 键 词：索杆张力结构 力形结合 自应力模态 奇异值分解法 

分 类 号：TU399[建筑科学—结构工程]