局部错层框架结构混合减震分析

Seismic Performance Analysis of Staggered Floors in Frame Structures

以某扭转不规则的局部错层结构工程实例为研究对象,针对该工程位移角不满足规范限值和减少结构扭转效应等问题,选取7条地震动作为激励,在SAP2000软件中建立其三维模型,并在结构中分别设置黏滞阻尼器(VD)和防屈曲耗能支撑(BRB)进行混合减震分析。分析表明:结构层间位移角降低明显,满足规范要求限值,并且结构位移比均降低到1. 2以下,结构扭转效应得到控制,错层处的框架柱内力较减震前有所降低,可为扭转不规则的局部错层框架结构进行消能减震设计提供有益的参考。

In this paper,a case study of an irregular local partial-layered structure with high torsion is taken as a research object.In view of the problem that the displacement angle of the project does not satisfy the standard limits and to reduce the structural torsion,seven seismic actions are selected as stimuli.In SAP2000 software,a three-dimensional model was established,and a viscous damper(VD)and a buckling-restrained brace(BRB)were respectively set in the structure for hybrid damping analysis.The analysis shows that the displacement angle of the structural layer is obviously reduced,and the limit of the specification is satisfied,and the displacement ratio of the structure is reduced to less than 1.2.The torsional effect of the structure is controlled,which can providereference for energy dissipation and damping design of an irregular local staggered frame structure.