Study on Seismic Response Characteristics of Double Cables Suspension Bridge
Damping in double Cables suspension bridge composed of steel reinforcement beams and reinforced concrete tower is non-classical, which leads to coupled equations of motion in main coordinate system. Based on the complex damping theory, the viscous damping ratio is solved, which can be used to describe energy dissipation characteristics of non-classical damping system approximately. Seismic response of double chains suspension bridge is analyzed through an example of double chains suspension bridge, considering the geometric nonlinearity and non-classical damping. And numerical calculation is presented for seismic response subjected to independent effect or combination effect of three orthogonal components of seismic wave. Single cable suspension bridge can be taken as a special case of double cable suspension bridge, after the main cable shape coefficient is introduced. The dynamic responses of double cable suspension bridge and single cable suspension bridge are compared to reveal the characteristics of Seismic Response of double cable suspension bridge. The study of the dynamic responses characteristics of double cable suspension bridge has a positive significance on structural form selection of such type bridge during designing, dynamic performance evaluation and reinforcement design has positive significance.
Double cables suspension bridge Non-classical damping Equivalent viscous damping ratio Response spectrum Time history analysis Cable shape coefficient
Nan Hong Ding Li Xia Lin Yong Jiu Qian Lei Huang
School of Civil Engineering Lanzhou jiaotong University, Lanzhou 730070, China School of Civil Engineering Southwest Jiaotong University, Chengdu 610031, China
国际会议
上海
英文
408-411
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）