无支座简支转连续梁桥动力特性分析  

Analysis of Dynamic Characteristics of Simply Supported-continuous Beam Bridge Without Support

作　　者：郭志豪 李之达[1] 石彬 王戈 GUO Zhihao;LI Zhida;SHI Bin;WANG Ge(School of Transportation, Wuhan University of Technology, Wuhan 430063, China;Henan Provincial Communications Planning & Design Institute Co., Ltd., Zhengzhou 450000, China)

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]河南省交通规划设计研究院股份有限公司,郑州450000

出　　处：《交通科技》2020年第2期24-26,共3页Transportation Science & Technology

摘　　要：文中以某项目5×30 m先简支后连续小箱梁为研究背景,借助midas Civil有限元结构分析软件,分析了无支座简支转连续梁桥固有频率及振型,并与相同状态下有支座简支转连续梁桥的固有频率相比较,分析有无支座的桥梁结构在固有频率上的差异,运用现场实验验证计算结果与实测值的吻合性。结果表明,无支座简支转连续梁桥的固有频率略大,随着阶数的提高,有无支座对成桥自振频率的影响逐渐减小。In this paper,based on the research background of a 5×30 m simple supported continuous small box girder project,with the aid of miads Civil finite element structural analysis software,the natural frequency and vibration mode of the simple supported to continuous girder bridge without support are analyzed,and compared with the natural frequency of the simple supported to continuous girder bridge with support under the sameconditions,the difference between the natural frequency of the simple supported to continuous girder bridge with or without support is analyzed,and the consistency betweensimulation results and the actual results is verified by field experiments.The results show that the natural frequency of the simple support to continuous beam bridge without support is slightly larger,and the influence of the support to the natural frequency is gradually reduced with the increase of the order.

关 键 词：简支转连续 小箱梁 无支座 模态 

分 类 号：U441[建筑科学—桥梁与隧道工程]