基于Push-over原理的SAP2000结构弹塑性分析实例

Push-over-principle analysis based on the case of SAP2000

Push-over分析是实现基于性能抗震设计的重要方法之一,阐述了Push-over分析的基本原理和方法,给出适合我国抗震规范的、利用SAP2000程序进行Push-over分析的计算步骤,并用一框架结构实例说明.分析结果包括底部剪力-顶部位移结构破坏时塑性铰的分布等,利用分析结果对结构的抗震性能做出了评估.表明Push-over分析是现阶段对结构在罕遇地震作用下进行弹塑性分析的有效方法.

Push-over analysis is an important method for performance-based seismic design. Based on the principles, this paper reviews the principles of Push-over analysis, presents the analysis procedures of Push-over analysis which is adaptable to China Code for seismic design. By means of SAP2000, a case of Push-over analysis is presented. With the results which include shear force-displacement, distribution of the plastic hinges, the seismic performance of the structure is evaluated. It is proved that Push-over analysis is an effective method for structural analysis under the maximum earthquake.