外廊式单跨框架结构加柱静力弹塑性分析

Nonlinear static analysis on adding columns on gallery type single-span frame

发展单跨悬挑外廊改为双跨的加固方法,为对外廊式单跨框架结构进行抗震加固提供参考。选择5种截面尺寸不同的柱,分别对一外廊式单跨框架结构挑梁端部进行加柱,使原结构横向变为双跨体系,并进行静力弹塑性分析。结果表明,运用该方法对结构进行加固后,结构抗震性能明显加强;根据实际情况和目标性能可选出最优截面柱用以加固。本文所做的分析,对单跨悬挑外廊改为双跨加固方法的实际应用有一定参考价值。

The aim of the study is to develop the strengthening approach that changes the structure with cantilevered gallery from single-span into double-span,which can provide the basis for the seismic strengthening on gallery type single-span frame.The cantilever ends of a gallery type single-span frame were reinforced by five kinds of columns with different sizes respectively to change the original structure into a double-span system in the horizontal direction,and the nonlinear static analysis was done for it.The results show that the seismic performance of structure improves significantly after strengthening with the approach in this paper,and the best column can be selected according to the actual situation and the target performance.The analysis in this paper has some reference value for the practical application of strengthening approach that changes the structure with cantilevered gallery from single-span into double-span.