弹塑性分析原理及其在实际工程中的应用

Engineering application and principle of elasto-plastic analysis method

本文简要描述了建筑结构弹塑性分析方法的基本原理,结合ABAQUS有限元程序,重点介绍了动力弹塑性分析法在前处理和计算过程中所涉及的假定,对包括理论假定、单元选取、材料本构关系的选取、阻尼指定、地震波选取、数值解法的优劣及弹塑性时程分析结果的初步判断方法进行了分析和探讨,并运用于实际超限工程,在性能化设计目标的前提下,弹塑性分析结果很好地反映了结构的塑性损伤变化情况,为后续的结构设计提供了依据。

The principle of elasto-plastic analysis method is briefly described,with combination of ABAQUS,the related assumptions in the pre-processing and calculation of the dynamic elasto-plastic analysis are introduced emphatically,the theoretical hypothesis,selection of the elements and the material constitutive relationship,the selection of the earthquake wave,the determination of damping,the advantages and disadvantages of numerical methods and the preliminary judging methods on the results of elasto-plastic time history analysis are analyzed and studied. On the basis of performance-based design method,a limit project was analyzed using the elasto-plastic method,the results reflect the plastic damage changes in the structure,and provide a basis for the subsequent structural design.