曲率半径和桥面不平度对大跨弯连续刚构桥冲击系数的影响  

Influence of Curvature Radius and Deck Roughness on Impact Coefficient of Long-span Curved Continuous Rigid Frame Bridge

作　　者：王俊霞 申林 郭大虎 卓亚娟[4] 韩智强[4] WANG Junxia;SHEN Lin;GUO Dahu;ZHUO Yajuan;HAN Zhiqiang(Department of Traffic Engineering,Shanxi Engineering Vocational College,Taiyuan 030009,China;China-Road Transportation Verification&Inspection Hi-Tech Co.,Ltd,Beijing 100088,China;Shanxi Yuxinkai Engineering Testing Co.,Ltd,Taiyuan 030000,China;School of Vehicle and Transportation Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]山西工程职业学院交通工程系,山西太原030009 [2]中路高科交通检测检验认证有限公司,北京100088 [3]山西裕欣凯工程检测有限公司,山西太原030000 [4]太原科技大学车辆与交通工程学院,山西太原030024

出　　处：《太原学院学报（自然科学版）》2023年第4期7-12,共6页Journal of TaiYuan University:Natural Science Edition

基　　金：山西省高等学校科技创新项目(2022L707);山西工程职业学院2022年度院级课题(XQ2022-11)。

摘　　要：为了研究曲率半径和桥面不平度对大跨弯连续刚构桥冲击系数的影响,基于车桥耦合基本理论,以三轴平面车辆模型为例,采用单一参数法分析了4种曲率半径桥梁模型和3种等级桥面不平度参数下大跨弯连续刚构桥冲击系数的变化规律。结果表明:桥梁扭矩冲击系数随曲率半径的减小而逐步增大,尤其在曲率半径R≤750 m时变化较为显著,而挠度和弯矩冲击系数则变化不大;随着桥面状况的恶化,桥梁整体冲击系数有较大增幅,均超过了现有规范冲击系数的计算值,建议在后续研究成果中应考虑曲率半径和桥面不平度的影响。研究成果可为大跨桥梁动力安全评估提供技术支持。In order to study the influence of curvature radius and deck unevenness on impact coefficient of long-span curved continuous rigid frame bridge,based on vehicle-bridge coupling theory,a three-axis plane vehicle model is taken as an example,the impact coefficient of long-span curved continuous rigid frame bridge with 4 different curvature radius bridge models and 3 different levels of deck roughness parameters is calculated by single parameter method.The results show that the torque impact coefficient of the bridge increases with the decrease of the curvature radius(especially R≤750 m),but the deflection and moment impact coefficient have little change;with the deterioration of the bridge deck,the overall impact coefficient of the bridge increases rapidly,which exceeds the current specifications take values.The research results can provide technical support for dynamic safety assessment of long-span bridges.

关 键 词：车桥耦合 冲击系数 曲率半径 桥面不平度 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]