Direct design method for damped structure based on seismic capacity margin.I:Methodology
Various design methods aimed at the structures equipped with diverse passive energy dissipation devices(EDDs)have been proposed previously.However,nonlinear time history analysis or iteration process result in less practicality for some of the methods and some other methods are limited to certain kinds of EDDs.A direct design method is proposed in this paper by taking a new design target called the seismic capacity margin ratio(SCMR).SCMR is defined as the ratio of the seismic demand required by the target structural performance limit to the design seismic demand.The proposed method enables easier estimation of elastic-plastic response of the structure without any iteration or nonlinear dynamic analysis.Meanwhile,the influence of the supplemental dampers on SCMR is considered from different structural performance indicators seperately,by which the proposed method is applicable for multi-types of passive EDDs.As the first part of the companion set,this paper gives the basic concept of SCMR based on capacity and demand spectra at first.Then the relationship is established between the supplemental damper parameters and the change rates of performance indicators,as well as the change rate of SCMR.The design methodology is clarified by taking the structure with viscous dampers(VDs)or metal yielding dampers(MYDs)as examples.The design procedure is presented briefly at last.In the companion paper,the procedure is illustrated by applying on a prototype reinforced concrete(RC)structure and effectiveness of the proposed method is verified.
direct design method seismic capacity margin ratio reinforced concrete structure pushover analysis passive energy dissipation device
M.M.Islam Linfei Hao Ruifu Zhang Songtao Xue
Research Institute of Structural Engineering & Disaster Reduction,Tongji University,Shanghai,China Earthquake Engineering Research & Test Center,Guangzhou University,Guangzhou,China Research Institute of Structural Engineering & Disaster Reduction,Tongji University,Shanghai,China;E
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
2990-2999
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）