(西安交通大学土木工程系，西安 710049)

［摘要］使用时程分析法对地震作用下结构模型的累积塑性变形和塑性能分布进行分析，发现层间屈服位移在一定范围内的改变，对两者的分布规律影响较小。将累积塑性变形在各楼层均匀分布的结构定义为优化布置刚度结构，其层间剪力系数定义为优化布置刚度结构层间剪力系数。提出了使累积塑性变形按楼层均匀分布的优化布置刚度结构层间剪力系数表达式，可以用于结构优化布置刚度的设计。

［关键词］累积塑性变形分布；累积塑性能分布；优化布置刚度层间剪力系数；时程分析

Seismic response of structure with stiffness optimization arrangementLi Peng, Pei Xingzhu, Zhao Guangwei, Liu Zhengwei

(Department of Civil Engineering, Xi´an Jiaotong University, Xi´an 710049, China)

Abstract:The distribution of cumulative plastic displacement and energy of structures in earthquake is crucial for structure design. When the yield displacements are in a certain scale, both rules of distribution have no more shifts. Modulating stiffness of structure makes the distribution of cumulative plastic displacement equilibratory in every floor, and this kind of structure is defined as the structure with stiffness´ optimization arrangement. Function of its interlaminar shear force coefficient is gained. Applicability of the function has been validated, so it can be applied in the optimization design of structure stiffness.

Keywords:cumulative plastic displacement; cumulative plastic energy distribution; interlaminar shear force coefficient;time-history analysis