波形钢腹板组合槽型梁动力特性研究及参数分析  

Study on Dynamic Property Parameter Analysis of Composite Trough Girder with Corrugated Steel Webs

作　　者：荣学亮[1,2] 欧阳靖 赵品 黄侨[3] 卜建清 RONG Xue-liang;OUYANG Jing;ZHAO Pin;HUANG Qiao;BU Jian-qing(State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [2]石家庄铁道大学土木工程学院,河北石家庄050043 [3]东南大学交通学院,江苏南京211189

出　　处：《桥梁建设》2022年第6期95-101,共7页Bridge Construction

基　　金：国家自然科学基金项目(51508348);京津冀协同创新共同体建设专项(20547601D);河北省自然科学基金项目(E2017210183)。

摘　　要：为了解波形钢腹板组合槽型梁的动力特性,采用试验和有限元法对其自振频率和振型进行研究。按照1∶4的缩尺比,制作1根预应力混凝土波形钢腹板组合槽型试验梁进行动力特性试验,建立波形钢腹板组合槽型梁及混凝土腹板槽型梁有限元模型进行对比。基于有限元模型,分析混凝土底板厚度、上翼缘板宽度和梁间横梁设置对波形钢腹板组合槽型梁自振频率和振型的影响,并与混凝土腹板槽型梁结果进行对比。结果表明:波形钢腹板组合槽型梁与混凝土腹板槽型梁低阶(前5阶)自振频率相差较小,变化范围不到10%;高阶(大于5阶)时自振频率变化明显增大,10阶时波形钢腹板组合槽型梁自振频率约为混凝土腹板槽型梁的68%。混凝土底板厚度对波形钢腹板组合槽型梁扭转自振频率影响较大,上翼缘板宽度对波形钢腹板组合槽型梁的扭转自振频率影响较小,梁间横梁设置方案对波形钢腹板组合槽型梁竖弯和扭转自振频率影响均很小。Tests and finite element analysis were conducted to examine the dynamic property of the composite trough girder with corrugated steel webs.A 1∶4 scale prestressed concrete composite trough girder with corrugated steel webs was prepared for the test,and the natural frequencies and vibration modes of the composite girders with corrugated steel webs and concrete webs respectively were numerically simulated.Based on the finite element model,the impacts of concrete base thickness,upper flange width and layout of cross beams on the natural frequencies and vibration modes of the two types of composite trough girders were analyzed and compared.It is shown that there is a minimal difference between the lower-mode(first 5 modes)natural frequencies of the composite trough girders with corrugated steel webs and with concrete webs,less than 10%.The natural frequencies of higher modes(from the fifth mode upward)are significantly enhanced,when it comes to the 10th-mode,the natural frequencies of the composite girder with corrugated steel webs are 68%of those of the composite girder with concrete webs.The thickness of the concrete base exerts a notable impact on the torsional natural frequencies of the composite trough girder with corrugated steel webs,while the impact of the width of upper flange is minimal.The layout of cross beams between the girders also has minimal impacts on the vertical bending and torsional natural frequencies of the composite trough girder with corrugated steel webs.

关 键 词：桥梁工程 槽型梁 波形钢腹板 动力特性 自振频率 参数分析 模型试验 有限元法 

分 类 号：U448.21[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]