会议专题

SEISMIC DAMAGE CONTROL OF HYBRID STRUCTURE USING MR DAMPERS

  In this paper,the semi-active controller platform comprising the Bouc-Wen model of MR damper,semi-active control law,and an elastic-plastic damage material model of steel are developed into LS-DYNA program.The damage criteria of steel frame and concrete tube are proposed,together with the dissipated internal energy of each story,the maximal control force produced by MR dampers at different stories are optimally determined.As a numerical example,the dynamic responses and damage process of a 15-story steel-concrete hybrid structure without MR dampers,with MR dampers located between steel frame and concrete core tube,and with MR dampers between the columns of steel frame are analyzed.Dynamic responses results indicate that both the two styles of locations of MR dampers can reduce the story drift of structure to some extent,however,because of the limited deformation capacity of concrete core tube,the MR dampers cannot suppress the weak links of structures definitely.Damage analysis results show that the steel frame experiences no damage even under 0.3g earthquake motions,while the reinforced concrete tube is significantly damaged and close to collapse,and the deformation capacity of the reinforced concrete tube should be increased to improve the seismic performance of the hybrid structure.

Steel-concrete hybrid structure magnetorheological damper damage material model damage analysis

Longhe Xu Yang Lv Zhongxian Li Yang Ding

School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, P.R.China Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin 300072, P.R.China

国际会议

The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

武汉

英文

342-347

2012-11-17(万方平台首次上网日期,不代表论文的发表时间)