不同性能等级下剪力墙的反应调整系数

根据不同性能状态下钢筋混凝土剪力墙抗震能力的差别,确定不同性能等级下剪力墙的反应调整系数.针对独立悬臂延性剪力墙,采用剪力墙塑性铰区的边缘受压混凝土和边缘钢筋的应变将受弯破坏现象划分为4个性能等级,并提出各性能等级的反应调整系数的计算方法;通过剪力墙边缘应变的计算,明确通过常规承载力验算的剪力墙在设计地震等效荷载作用下可达到的性能等级.在性能抗震设计时,可用剪力墙的性能反应调整系数调整设计所采用的地震等效荷载,如剪力墙能通过常规的抗震验算,可初步保证具备所要求的性能.

Response Modification Factors of Shear Walls in Different Performance Levels

In this paper,the response modification factors(RMFs) of reinforced concrete shear walls in different performance levels are first determined according to the difference in seismic capacity of the walls under different performance statuses.Next,on the basis of the edge strain statuses of the concrete and the vertical steel in the plastic hinge region,the flexure destruction response of a single cantilever ductility shear wall is divided into four performance levels,and the calculation methods of the corresponding RMFs are put forward.Then,the performance level lying behind the conventional seismic design procedures is manifested according to the calculated edge strain by imposing the equivalent load of the earthquake action on the shear walls.It is finally concluded that,in the performance-based seismic design,the RMFs of the shear walls can be used to adjust the equivalent load of the earthquake action,so that the performance level can be approximately obtained by following the conventional seismic design procedures.