摘要
以重庆青草背长江大桥为工程背景,基于桥梁静力效应等效的原则针对规范车道荷载逆向反推得到桥上车辆的布置,开展不同车辆速度、路面粗糙度情况下的车辆-桥梁耦合振动分析,得到桥梁各关注项目的冲击系数,评价现行规范冲击系数取值的适应性。研究结果表明:现行规范中的冲击系数取值对于大跨度悬索桥的部分内力效应偏于不安全。
Based on the equivalent principle for static response of bridge,car distribution was determined according to the lane load of current specification,in the engineering background of Chongqing Qingcaobei river bridge.Car-bridge coupling analysis was then performed under various running speeds and road roughness.And the impact coefficients of various correlative programs of the bridges were obtained.The adaptability of the impact coefficients of the current specification was evaluated.The results show that impact coefficients of current specification are inclined to be dangerous for certain member forces of long-span suspension bridge.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2013年第S1期848-851,共4页
Journal of Chongqing Jiaotong University(Natural Science)
基金
重庆交通大学(桥梁)结构工程重点实验室开放基金项目(CQSLBF-Z10-1)
重庆市教育委员会基金项目(KJ080413)
关键词
大跨度桥梁
冲击系数
车桥耦合
long-span bridge
impact coefficient
car-bridge coupling
