桥梁冲击系数随机性分析  

Randoms Analysis of Bridge Impact Coefficient

作　　者：施尚伟[1] 杜松[1] 李莹雪[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2012年第3期377-379,393,共4页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：车辆对桥梁冲击作用的影响因素包括:车桥频率耦合、桥面平整度、行车试验的随机性、动力荷载效率大小等。以一座典型3跨连续箱形桥的动荷载试验为基础,通过行车试验作用下实测动挠度时程信号,对该桥冲击系数随机性、冲击系数与动力荷载效率之间相关性进行分析。研究表明:车辆对桥梁的冲击系数具有较大的随机性,冲击系数与动力荷载效率之间具有较大的相关性。The influence factors of vehicles impact on the bridges include the vehicle-bridge frequency coupling,the bridge deck unevenness,the randomness of the driving test and size of dynamic loading efficiency.Based on a dynamic test upon a typica three span continuous box girder bridge,through the dynamic deflection schedule signal under the action of road test,the randomness of bridge impact coefficient,the correlation between impact coefficient and dynamic loading efficiency were analyzed.Studies have shown that the impact coefficient is quite random;the impact coefficient has close relation with dynamic loading efficiency.

关 键 词：冲击系数 动力荷载效率 动挠度 随机性 相关性 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]