几何非线性结构的徐变效应分析  

CREEP EFFECT ANALYSIS OF GEOMETRIC NONLINEAR STRUCTURES

作　　者：占玉林[1] 向天宇[1] 赵人达[1] 

机构地区：[1]西南交通大学桥梁工程系,四川成都610031

出　　处：《工程力学》2006年第7期45-48,共4页Engineering Mechanics

基　　金：西南交通大学科技发展基金项目(2003A14)

摘　　要：主要研究了几何非线性结构的徐变效应问题。在大变形理论的基础上,给出了空间梁单元的非线性几何方程,阐述了几何非线性结构进行徐变效应分析的原理和方法,并建立了相应的平衡方程。考虑徐变效应的内力重分布的影响,得到了按施工阶段进行几何非线性结构的徐变分析的增量形式和分析步骤。最后通过与试验结果进行比较,验证了程序的正确性。The creep analysis of geometric nonlinear structures is studied. Based on the theory of large deformation, the nonlinear geometric equation of three dimensional beam elements is deduced. Then, the computational principle and corresponding formulation of the creep analysis of geometric nonlinear structures are presented. Considering the effect of the internal force redistribution of structures caused by creep deformation, the incremental step-by-step procedure for analyzing the creep effect of geometric nonlinear structures at construction stages is achieved. In the end, the validity of the program is verified by test results.

关 键 词：桥梁工程 混凝土结构 徐变效应 几何非线性分析 增量法 内力重分布 

分 类 号：O34[理学—固体力学] TU375[理学—力学]