桥面不平度和车辆行驶速度对曲线梁桥动力响应的影响  

Influence of Bridge Surface Roughness and Vehicle Speed on Dynamic Response of Curved Continuous Bridges

作　　者：姜长宇 邢世玲 吴波 JIANG Changyu;XING Shiling;WU Bo(Architects&Engineering Co.,Ltd.,of Southeast University,Nanjing 210096,China;College of Traffic and Transportation Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]东南大学建筑设计研究院有限公司,南京210096 [2]南京工业大学交通运输工程学院,南京210009

出　　处：《现代交通技术》2019年第6期48-53,64,共7页Modern Transportation Technology

基　　金：江苏省交通科学研究计划项目(2010Y13)

摘　　要：以三跨混凝土曲线连续梁桥为例,通过数值模拟计算,分析桥面不平度、车辆行驶速度对控制截面弯矩、扭矩及位移动态增量的影响。研究结果表明:桥面不平度对混凝土曲线连续梁桥动力响应的影响较大,随着桥面状况的恶化,各控制截面内力和变形的动态增量显著增长;车辆行驶速度对混凝土曲线连续梁桥动力响应有一定影响,随着车辆行驶速度的增加,各控制截面内力和变形的动态增量呈波状变化;在桥面不平度等级和车辆行驶速度相同的情况下,混凝土曲线连续梁桥的扭矩动态增量>位移动态增量>弯矩动态增量。Taking a three-span concrete curved continuous bridge as an example,the influence of bridge deck roughness and vehicle speed on the dynamic increment of control section bending moment, torque and displacement are analyzed by numerical simulation. The results show that the bridge deck roughness has a great influence on the dynamic response of the concrete curved continuous bridge. With the deterioration of the bridge deck, the dynamic increment of internal force and deformation of each control section increases remarkably;the vehicle speed has a certain influence on the dynamic response of the bridge. As the speed increases, the dynamic increment of force and deformation in each control section changes wavy;in the case that the bridge surface roughness level and the vehicle traveling speed are the same, dynamic increment of torque of concrete curved continuous bridge > dynamic increment of displacement > dynamic increment of moment.

关 键 词：混凝土曲线连续梁桥 桥面不平度 车辆行驶速度 动态增量 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]