A practical displacement-based design method for viscoelastic dampers attached to high-rise structures
Viscoelastic damper(VED)is a typical type of passive control device of which the viscoelastic(VE)material layers,assembled between steel plates,allow hysteretic shearing deformation to dissipate seismic input energy in structures.In this study,a practical displacement-based design method for VEDs applied in high-rise structures is presented.Firstly,a new type of VED with strong nonlinear characteristics,showing both softening and hardening,is introduced.Then,the structure added with VEDs is simplified as a SDOF system,and an assessment method for the seismic peak response is proposed for this system based on the response spectrum theory.Two critical parameters on the controlling effect of VEDs are determined.They are:(a)the damper strain; and(b)the stiffness ratio of the dampers to the main structure.In addition,a practical displacement-based design method for structures equipped with VEDs is proposed.The design process with inevitable iterative calculation is first carried out for the simplified SDOF system and then extended to the MDOF system to conduct seismic design.The iterative calculation is executed using the assessment method for seismic peak response,which has no need to conduct nonlinear timehistory analysis.So the design difficulty can be greatly reduced and the design efficiency obviously improved.Finally,a 24-story steel frame located in Beijing is used as the design case,in which 70 VEDs are installed based on the proposed design process.The nonlinear time-history analysis is conducted for the structure with additional VEDs and that without additional VEDs,in which structures are subjected to seven ground motions.The results show that the performance objectives can be well achieved according to the proposed design method,which correlates well with the two-stage seismic design process.
viscoelastic damper nonlinear characteristics displacement-based design method high-rise structure nonlinear time-history analysis
Shunming Gong Ying Zhou
State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2958-2968
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）