具有初始弯曲的框架结构EFG法分析  

The EFG analysis of the frames with the initial curvature

作　　者：石晶[1,2] 郝际平[1] 郑碧玉[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]长安大学理学院,陕西西安710064

出　　处：《西安建筑科技大学学报（自然科学版）》2009年第2期168-172,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50378078)

摘　　要：以具有初始弯曲框架结构为研究对象,在非线性连续介质力学有限形变理论的基础上,通过最小二乘法,采用无网格伽辽金法推导出具有初始弯曲梁柱非线性刚度矩阵,建立了相应的EFG法离散化系统方程,采用实际算例,将本文分析结果与有限元分析结果进行了对比,验证了本文方法的实用性和可靠性.The frames with initial curvature are taken as the subject for study in this paper. Based on the finite-deformation theory of nonlinear continuum mechanics, a nonlinear stiffness matrix of beam-column with initial curvature and the discrete system equation are obtained by the element-free Galerkin method. By contrasting with the results of the finite element analysis of the typical frame examples, the application and reliability of the method are verified.

关 键 词：初始弯曲 框架结构 无网格伽辽金法 几何非线性 非线性连续介质力学 有限变形理论 

分 类 号：TU391[建筑科学—结构工程]