局部毁坏钢筋混凝土框架结构的Pushover破坏分析

Pushover collapse analysis for local destroyed big span reinforced concrete frame structure

柱是钢筋混凝土框架结构的主要承重构件,如果柱刚度减小或者断裂,则结构将会在内力重组的同时发生破坏,甚至倒塌。Pushover分析是基于性能抗震设计的一种重要方法,本文介绍了Pushover分析的基本原理以及在SAP2000软件中的计算步骤,运用Pushover分析方法评估了柱丧失承载力后钢筋混凝土框架结构的承载能力,并与完整结构的结果做了对比,从中得出一些有参考意义的结论。

Column is the main loading part in reinforced concrete frame structures. If the column＇s stiffness reduces, or it destroys completely, the frame structure will be broken, even be collapsed along with the recombination of internal force. Pushover analysis is an important method based on seismic performance design. It this paper, the base theory of Pushover analysis and the calculating steps in SAP2000 are introduced. The loading capability of the local destroyed structure with some column broken is evaluated by using pushover method. The analysis results are compared with that of the complete structures and some useful conclusions obtained.