索杆张力结构初始预应力分布计算方法研究  

INITIAL PRESTRESS COMPUTATION PROCEDURES FOR TENSILE CABLE-STRUT STRUCTURE

作　　者：任涛[1] 陈务军[1] 付功义[1] 

机构地区：[1]上海交通大学空间结构研究中心,上海200030

出　　处：《工程力学》2008年第5期137-141,共5页Engineering Mechanics

基　　金：国家863计划项目(2006AA705211)

摘　　要：索杆张力结构是具有预应力自平衡的结构体系,具有静不定、动不定特征。初始预应力分布的计算是张力结构受力分析的基础。该文从力密度法表示的基本平衡方程出发,采用线性调整理论,利用最小二乘解,推导出张力结构找形分析列式,建立了结构的初始预应力分布计算方法。用MATLAB语言编制了程序并进行数值分析,算例结果表明该文分析方法正确、有效。The tensile cable-strut structure is self-equilibrate prestressed system. The calculation statically and kinematically indeterminate, which is a of initial prestress is fundamental to the following structural analysis. In this paper, a new numerical computation procedure is developed for the initial prestress calculation of tensile cable-strut structure. The force density method is the cornerstone of the analytical formula. And with the introduction of linear adjustment theory and the use of the least square least norm solution, the form-finding analysis and the initial prestress are formulated. A program is coded with MATLAB Language according to the algorithm developed in the context, and a series of numerical analyses have been carried out and verified. Numerical results show that the method is accurate and effective.

关 键 词：索杆张力结构 线性调整理论 初应力分布 力密度 找形 

分 类 号：TU356[建筑科学—结构工程] O211.1[理学—概率论与数理统计]