巨型钢框撑-组合钢板墙筒体结构地震易损性分析

Seismic fragility analysis of mega-steel braced frame-composite steel plate shear wall structure

巨型钢框撑-组合钢板墙筒体结构是由巨型钢框架、巨型支撑、组合钢板墙核心筒和伸臂桁架组成的新型超高层结构体系。利用ABAQUS软件建立这种结构体系的计算模型,基于增量动力分析方法得到结构的易损性曲线,对结构的易损性能进行评估和分析。结果表明:巨型钢框撑-组合钢板墙筒体结构在设防烈度大震作用下发生倒塌破坏的概率较小,结构具有良好的抗震性能。巨型支撑可有效控制结构地震作用下的位移反应,减小各损伤状态的超越概率,提高结构的抗倒塌安全储备。

Mega steel braced frame-composite steel plate shear wall structure is an innovative hybrid structural system for super high-rise buildings,which consists of mega steel frame,mega braces,composite steel plate core wall and outriggers.Finite element model of this type of structure was conducted by soft ware ABAQUS.Structural fragility curves based on incremental dynamic analysis was obtained.The collapse probability of this hybrid structure is relatively small that imply its adequate seismic capacity under strong earthquakes.Displacement response as well as exceed probabilities relevant to different damage criterions can be reduced effectively by using mega braces,then the collapse resistant capacity of structure can be improved.