基于分布参数模型的摇摆墙-框架结构协同性能分析  

Co-operation performance of rocking wall moment frame structure based on distributed parameter model

作　　者：苏醒 阎石[1] 潘秋宇 SU Xing;YAN Shi;PAN Qiuyu(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《世界地震工程》2024年第2期1-13,共13页World Earthquake Engineering

基　　金：国家重点研发项目(2018YFC0705602)。

摘　　要：为了研究自复位摇摆墙-框架(rocking wall-moment frame,RWMF)结构的协同工作性能,利用所提出的分布参数模型对自复位RWMF结构的协同工作原理与基本影响规律进行研究,建立并求解了完整的静力和动力方程;得到RWMF结构的侧移、内力和各阶动态响应的闭合解,通过参数分析研究框架与摇摆墙(rocking wall,RW)之间的刚度特征值λ和RW底部旋转约束R_(f)对协同性能的影响,并采用层间位移集中系数(inter-story drift concentration factor,DCF)量化RW与框架之间的协同性能。结果表明:RW的设计应满足λ<10,否则,RW对协同性能的影响将微乎其微;当λ值适中时,RW底部约束可以增进协同作用,R_(f)>5后,其约束的继续增大不会再增进RW与框架间的协同效果;当λ和R_(f)取1≤λ≤5∩0.1<R_(f)≤10时,自复位RWMF结构可以在分布均匀性和减小主体框架损伤之间实现平衡,达到最优的协同性能。To study the co-operation performance of self-centering rocking wall-moment frame(RWMF)structure,the proposed distributed parameter model is utilized to investigate the principle and basic influence law of co-operation performance.The complete static and dynamic response equations are developed and solved to obtain the closed solutions for the lateral displacement,internal forces,and dynamic responses of each order of the RWMF structure.The effects of the stiffness ratioλbetween frame and rocking wall(RW)and the rotational constraint R_(f)at the bottom of the RW on the co-operation performance are also investigated by parametric analysis,and finally the co-operation performance is quantified by using the inter-story drift concentration factor(DCF).The results show the characteristic stiffness value of the RW should be less than 10,otherwise the RW will have minimal effect on co-operating control;when the value ofλis moderate,the constraint at the bottom of the RW can enhance the co-operation effect,and when R_(f)>5,the continued increase of its constraint will not enhance the co-operation effect.Whenλand R_(f)are taken as 1≤λ≤5∩0.1<R_(f)≤10,the self-centering RWMF structure can achieve a balance between distribution uniformity and reduction of damage to the main frame,achieving optimal co-operation performance.

关 键 词：自复位摇摆墙-框架结构 分布参数模型 协同性能 旋转约束 层间位移集中系数 

分 类 号：TU375.4[建筑科学—结构工程]