摘要
绵竹市回澜立交桥为典型的小曲率半径梁桥,在汶川地震中该桥桥墩普遍出现塑性铰压溃破坏。基于对回澜立交匝道桥的震害情况调查,建立桥梁三维动力数值模型,进行了动力特性及动力时程分析,在时程分析中考虑了材料弹塑性、边界碰撞效应以及支座滑移效应等关键非线性因素,并研究了各因素对桥梁地震动响应的影响,最后,基于定性与定量分析的结论,得到了回澜立交匝道桥的震害成因。
The devastating Wenchuan earthquake caused substantial flexural failure of Huilan flyover located in Mianzhu City of Sichuan Province,China.Based on the investigation of the bridge damage,a three-dimensional mathematical model for eigenvalue analysis and non-linear time-history dynamic analysis was established.In nonlinear time-history analysis,the effects of elasto-plastic feature of material,boundary pounding and slippage of bearings on the seismic response of the flyover were studied with sensitivity analysis.Finally,based on the conclusions of qualitative and quantitative analysis,the seismic failure causes of Huilan flyover were obtained.
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第12期99-105,共7页
Journal of Vibration and Shock
关键词
汶川地震
回澜立交桥
震害成因分析
曲线梁桥
wenchuan earthquake
huilan flyover
causation analysis of seismic failure
curved bridge
