混凝土加劲梁自锚悬索桥动力特性影响因素分析  

Influence Factors Analysis of Dynamic Characteristics of Self-anchored Suspension Bridge with Concrete Stiffening Girder

作　　者：高文博 卢涛[2] 

机构地区：[1]港珠澳大桥管理局,广东珠海519015 [2]广东省长大公路工程有限公司,广州510620

出　　处：《广东公路交通》2016年第4期50-52,共3页Guangdong Highway Communications

摘　　要：以国内某混凝土加劲梁自锚悬索桥为研究背景,在总结前人研究成果的基础上,采用Midas Civil程序建立"脊骨梁"式有限元模型,研究结构自重与加劲梁横弯、竖弯与扭转刚度对混凝土加劲主梁自锚悬索桥动力特性的影响。结果表明结构自重变化对混凝土加劲主梁自锚悬索桥的动力特性影响较大,主梁竖弯刚度与扭转刚度对竖弯振动频率与扭转振动频率的影响较大,但横弯刚度对横弯振动频率影响不明显。In this paper, taking a domestic concrete stiffening girder self-anchored suspension bridge as the re-search background, in summing up the results of previous studies based on, using a ＂spine beam type finite ele-ment model＂ established through Midas civil procedure, the influence of structural weight, transverse bending, vertical bending and torsional stiffness of stiffening girder on the dynamic characteristics of concrete stiffening girder self-anchored suspension bridge have been studied. The results have shown that the change of the weight of the structure has great influence on the dynamic characteristics of the concrete stiffening girder self-anchored suspension bridge. The vertical bending stiffness and torsional stiffness of the main beam has great influence on the frequency of the vertical bending vibration and the torsional vibration frequency, but the influence of the transverse bending stiffness on the vibration frequency is not obvious.

关 键 词：自锚悬索桥 混凝土加劲梁 动力特性 有限元方法 自振频率 参数分析 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]