土木工程结构非线性计算分析研究进展

ADVANCES IN NONLINEAR COMPUTATIONAL ANALYSIS OF CIVIL ENGINEERING STRUCTURES

非线性行为分析是探究土木工程结构在极端环境荷载作用下的灾变机理和薄弱部位、预测结构极限承载能力的有效手段,在结构设计与性能评价方面已变得必不可少,高效、稳定、精确的非线性分析理论和求解技术一直是土木工程结构分析领域的研究热点。该文对结构非线性分析的基本发展过程进行了简要回顾,并重点对目前常用的非线性有限元分析方法的基本原理和研究进展进行了综述;围绕土木工程结构,总结了结构非线性分析方法在计算精度、稳定性、效率等方面的若干关键问题及相关研究进展,包括高效非线性分析法-隔离非线性法,并综述了该方法的最新研究进展。

Nonlinear analysis is an effective means to explore the disaster mechanism and weak parts of structures under extreme environmental loads,and to predict the ultimate bearing capacity of structures.It has become indispensable in structural design and performance evaluation.Thus,efficient,stable and accurate nonlinear analysis theory and solution technology have always been a research hotspot in the field of civil engineering structural analysis.The basic development process of structural nonlinear analysis is briefly reviewed,and the basic principles and research progress of commonly used nonlinear finite element analysis methods are summarized emphatically.Focusing on civil engineering structures,some key issues and relevant research progress in structural nonlinear analysis are summarized in terms of calculation accuracy,stability and efficiency,including efficient nonlinear analysis method-inelasticity separated method,and the latest research progress of this method is reviewed.