梁翼缘削弱式钢框架结构静力弹塑性分析

Pushover Analysis on Steel Frame with Reduced Beam Section

在对已发生的大地震调查中发现,钢框架结构刚性连接的抗震性能不足.为了提高结构的抗震性,梁构件采用翼缘削弱型梁(RBS)、运用SAP2000建立钢框架结构模型进行静力弹塑性分析.通过数值分析,RBS结构较刚性连接结构塑性铰出现时的顶点位移增加7.3%,结构整体抗震性能得到提高.

Seismic survey on the past earthquakes reveals that the rigid connection of steel frame structures shows an inad-equacy in seismic performance. In order to improve the seismic resistance of the structure, beams with reduced beamflange（RBS） should be applied. SAP2000 was used to build steel frame structure model for pushover analysis. Numericalanalysis proves that the vertex displacement of RBS structure increases by 7.3% when plastic hinge appears comparedwith that of the rigid connection structure, so that the overall seismic performance is improved.