局部带方钢管交叉支撑框架结构抗震性能研究

Research on the Seismic Behavior of Partially Square Steel Tube Supporting Frame

在验证了SAP2000建立标准模型合理的基础上,建立了3种不同布置形式的局部带方钢管交叉支撑混凝土框架结构模型,采用Push-over分析方法,对其抗震性能进行分析。结果表明:采用加交叉支撑后的框架结构在两种侧向水平加载模式下结构达到性能点时基底剪力均增大;结构在罕遇地震下的变形能力有所改善,抗震性能提高;采用加方钢管交叉支撑的部位,梁的承载能力得到了提高,底层柱需要采取加强措施以达到强柱弱梁的破坏机制,进而提高结构的抗震性能。

After verifying the model which was established by SAP2000 was reasonable,three different arrangement concrete frame structure models were established,which were supported by little square steel,and set reasonable parameters for Push- over analysis. Analysis results show that performance points of base shear increased for adding cross support structure in two lateral horizontal loading modes. Deformation of the structure the deformation ability were improved under severe earthquake,seismic ability raises.The carrying capacity of the beams have been improved which are in the site of adding square steel cross braces. But the columns which are in the bottom need to be taken to strengthen measures to achieve the destruction of the strengthen column weaken beam failure mode to improve the seismic performance of the structure.