Shock-absorbing Design of Highway Multi-span Continuous Bridge with Viscous Dampers
The paper explores the effect of the nonlinear fluid viscous dampers on the shock -absorbing performance of a highway 5 x30 m multi-span continuous bridge , where the nonlinear dynamic time-history analysis method is utilized. The optimization of the damper installation location and some relevant sensitive parameters ,such as the velocity exponent s and the damping coefficient Cd are studied, compared with the seismic response of the same bridge simply supported by rubber bearing pads. The analysis and calculation show that reasonably setting up viscous damper can in -crease the structure damping and improve the shock -absorbing capacity of the bridge. The longitudinal displacement of the bridge can be reduced by more than 70% and the moment of the pier at the bottom can be reduced by more than 70% , while the other parts of the bridge work elastically. In conclusion,effective ideas and approaches were provided for preventing the beam end collision with the back wall of the abutment ,the lowering of the beam ,the flexure-shear failure of the pier and other earthquake disasters. Meanwhile,this work could be a valuable reference for the shock -absorbing design and the engineering practice of the highway multi -span continuing bridge.
Xiayuan NING Dejian LI Dan LIU
Hunan Communication Research Institute ,Changsha 410075, China School of Civil Engineering ,Central South University ,Changsha 410000,China
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
868-874
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）