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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。
In this paper, the basic principle of elasto-plastic analysis method for building structure is briefly described. Based on the ABAQUS finite element program, the assumptions involved in the pre-processing and calculation of dynamic elasto-plastic analysis method are mainly introduced. Theoretical assumptions, unit selection, Structure selection, damping designation, seismic wave selection, numerical solution method and the preliminary judgment method of elastic-plastic time-history analysis results are analyzed and discussed, and applied to the actual overrun project, under the premise of performance-based design goals, The results of elasto-plastic analysis can well reflect the change of the plastic damage of the structure, which provides the basis for the subsequent structural design.