摇摆墙结构体系抗震性能研究进展

Research progress on seismic behavior of rocking wall system

摇摆墙(rocking wall,RW)可通过自身摇摆吸收和耗散受控结构动能,并利用摇摆构造实现自复位。为加快摇摆墙体系在工程结构抗震、减震(振)中的推广应用,回顾了摇摆墙的发展历程,总结了摇摆墙结构的主要分类及特点;进而从试验研究、数值模拟、理论分析、设计方法等四个方面梳理摇摆墙和摇摆墙-受控结构(rocking wall-controlled structures,RW-CS)的抗震性能研究进展和存在的不足,给出摇摆墙、摇摆墙-受控结构的未来发展建议。结果表明:与自由摇摆墙和受控摇摆墙相比,耗能摇摆墙(energy dissipation rocking wall system,ERWS)利用耗能装置获得了更优的抗震冗余度和减震(振)鲁棒性,是目前的研究热点;摇摆墙、摇摆墙-受控结构的抗震性能研究成果仍不足以支撑其优化设计与推广应用,实际地震动作用下耗能摇摆墙、耗能摇摆墙-受控结构在变频率、变幅值条件下的摇摆、耗能和复位机理,以及三者的供需平衡是未来研究重点;摇摆墙、摇摆墙-受控结构抗震设计经历了基于极限承载到基于性能(位移)的发展过程,而基于性能的抗震设计方法在复杂耗能摇摆墙、耗能摇摆墙-受控结构中的应用效果仍有待验证。

Rocking Wall(RW)can absorb and dissipate the kinetic energy of controlled structures through its ownrocking and achieve self-center capacity through its rocking structure.In order to speed up the popularization and application of RW systems in seismic resistance and shock absorption of engineering structures,this study reviewed the development history of RW,summarized the main classifications and characteristics of RW systems,and then elaborated on the progress and shortcomings of research on the seismic performance of RW and rocking wall-controlled structure(RW-CS)from four aspects,including the experimental research,numerical analysis,theoretical analysis and design methods.Finally,the future development direction of RW and RW-CS was given.The results show that,compared with the free RW and controlled RW,the energy dissipation rocking wall system(ERWS)can obtain better anti-seismic redundancy and damping robustness by introducing additional energy dissipation devices,which is a hot research topic at present.The existing findings on the seismic performance of RW and RW-CS are still insufficient to support their optimal design and practical application.The mechanisms of rocking,energy dissipation and self-center of ERWS and ERWS-CS are still unclear under variable frequency and amplitude excitation.Thus,the balance of supply and demand of these three mechanisms is the focus of future research.Moreover,the seismic design methods of RW and RW-CS have also undergone the development process from ultimate load-based to performance(displacement)-based design methods.The performance-based design methods still need to be verified and developed in complex ERWS and ERWS-CS.