混凝土连续梁桥无缝拓宽前后动力特性分析与实测研究
Analysis and Test Study on the Dynamic Characteristics of a Continuous Concrete Girder Bridge Broadened without Joint
DOI: 10.12677/HJCE.2018.71012, PDF,   
作者: 陈 宇*, 吴培峰, 李方元*：同济大学土木工程学院桥梁工程系，上海；李 阳：上海市政设计研究总院集团有限公司，上海
关键词: 桥梁拓宽；接缝；动力特性；Bridge Broadening； Seam； Dynamic Characteristics
摘要: 影响无缝拓宽桥梁拼接缝破坏的因素有许多。本文以实际桥梁无缝拓宽工程为背景，通过拓宽前后的动力性能差异分析，研究无缝拓宽桥梁拓宽前后动力差异性变化受到拼接缝的形式的影响明显，同时与拼接桥梁自身刚度大小有关；结合混凝土连续梁桥的拓宽前后实测数据验证相关结果。结论证明主桥梁结构激振基本同步，但桥与拼接板处激振存在较大差异，相关结论可为桥梁无缝拓宽设计与施工技术提供支撑。
Abstract: There are many factors that affect the failure of joint of seamless widening bridge. Based on a seamless widening actual bridge as the background, this paper analyzed the dynamic performance difference before and after bridges were broadened; the bridge dynamic characteristics were stu-died. It is obvious that the difference of rigidness of broadened bridges influences the characteristic frequency with different joint types. Combined with the actual measured data of the continuous concrete girder bridge, the dynamic characteristics were verified. The results show that the structural excitation of the main bridge and the side bridge is basically synchronous, but there is a big vibrating difference between the bridge and the joint plate. The results can be referred for the design and construction for the bridges broadened without joint.
文章引用：陈宇, 吴培峰, 李阳, 李方元. 混凝土连续梁桥无缝拓宽前后动力特性分析与实测研究[J]. 土木工程, 2018, 7(1): 91-99. https://doi.org/10.12677/HJCE.2018.71012

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