【摘要】 对立面不一致结构,即顶部楼层有局部偏心缩进的房屋建筑的弹塑性地震反应进行分析.以一理想的5层钢筋混凝土框架结构为例,分析了顶部偏心缩进25%、50%、75%等不同偏心缩进率结构在单向地震动输入下的弹塑性扭转效应.结果表明:顶部楼层的局部偏心缩进对结构的弹性反应将产生明显的影响;结构进入弹塑性运动后,平扭耦合运动的程度减小,偏心缩进对构件的最小延性要求影响较小.更多还原

【Abstract】 The inelastic seismic responses of buildings with local eccentric setback at top storey are researched by time history analysis method.Using an ideal five-storey reinforced concrete frame building as example,the inelastic torsional coupled effects of the buildings with different setback ratios of 25%,50% and 75% of the top storey area,on one direction excitation,are presented.The results show that the setback at top storey would cause significant effects on the elastic seismic response.However,it would reduce the torsional coupled responses and only cause slight effects on the minimum ductility demand of the lateral resisting element while in inelastic range.更多还原