PC板梁徐变上拱对高速行车舒适性的影响分析
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摘要
PC简支板梁桥过大徐变上拱不仅会影响桥梁结构的使用性能,而且还会影响行车舒适性。采用1/4汽车模型和半正弦曲线模拟板梁徐变上拱桥面线形,推导车辆竖向振动响应与板梁徐变上拱度、桥梁跨径、行车速度之间的数学关系。利用重庆高速公路某桥(7×25 m PC板梁)实测数据,分析徐变上拱对车辆振动响应和行车舒适度的影响,提出了基于公路设计行车速度的徐变上拱度控制值。
The excessive amount of creeping camber of a simplysupported prestressed concrete(PC) plate girder bridge will not only have adverse influence on the operational performance of the bridge structure,but also the influence on the riding comfort of traveling vehicle.In this paper,the vehicle model on a scale of 1/4 and the half-sine curve are used to simulate the longitudinal curve of the plate girder bridge deck with creeping camber and the mathematical relations between the vehicle vertical vibration response and creeping camber,span length and vehicle traveling speed of the bridge are derived.By the measurement data of an expressway PC plate girder bridge in Chongqing with span arrangement 7×25 m,the influence of the creeping camber on the vehicle vibration response and on the riding comfort is analyzed and the control values of the camber based on the highway designed vehicle traveling speed are put forward as well.
The excessive amount of creeping camber of a simplysupported prestressed concrete(PC) plate girder bridge will not only have adverse influence on the operational performance of the bridge structure,but also the influence on the riding comfort of traveling vehicle.In this paper,the vehicle model on a scale of 1/4 and the half-sine curve are used to simulate the longitudinal curve of the plate girder bridge deck with creeping camber and the mathematical relations between the vehicle vertical vibration response and creeping camber,span length and vehicle traveling speed of the bridge are derived.By the measurement data of an expressway PC plate girder bridge in Chongqing with span arrangement 7×25 m,the influence of the creeping camber on the vehicle vibration response and on the riding comfort is analyzed and the control values of the camber based on the highway designed vehicle traveling speed are put forward as well.
引文
[1]胡振东,王华林.高速车辆过桥时的舒适性分析[J].振动与冲击,2002,(4):103-105.
[2]宗周红,赖苍林,夏樟华.预应力混凝土连续梁桥振动特性变异及舒适度评价[J].地震工程与工程振动,2006,(2):71-77.
[3]重庆市交通规划勘察设计院,重庆交通大学.渝黔高速公路平摊子大桥行车动力试验报告[R].2004.
[4]余志生.汽车理论(第2版)[M].北京:机械工业出版社,1996.
[5]邓学钧,孙璐.车辆—地面结构系统动力学[M].北京:人民交通出版社,1998.
[6]方同,薛璞.振动理论及应用[M].西安:西北工业大学出版社,1998.
[7]何光里.汽车运用工程师手册[M].北京:人民交通出版社,1997.
[8]邓本波.汽车振动乘坐舒适性的评价方法研究(硕士学位论文)[D].合肥:合肥工业大学,2005.
[2]宗周红,赖苍林,夏樟华.预应力混凝土连续梁桥振动特性变异及舒适度评价[J].地震工程与工程振动,2006,(2):71-77.
[3]重庆市交通规划勘察设计院,重庆交通大学.渝黔高速公路平摊子大桥行车动力试验报告[R].2004.
[4]余志生.汽车理论(第2版)[M].北京:机械工业出版社,1996.
[5]邓学钧,孙璐.车辆—地面结构系统动力学[M].北京:人民交通出版社,1998.
[6]方同,薛璞.振动理论及应用[M].西安:西北工业大学出版社,1998.
[7]何光里.汽车运用工程师手册[M].北京:人民交通出版社,1997.
[8]邓本波.汽车振动乘坐舒适性的评价方法研究(硕士学位论文)[D].合肥:合肥工业大学,2005.
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