支座病害对大跨度钢桁梁桥的振动影响研究

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摘要支座是桥梁结构的重要构件，其技术状况优劣直接影响到桥梁整体和列车的运营安全。针对朔黄铁路64m单线下承式钢桁梁中出现的固定支座上座板与桁梁连接角钢断裂病害，采用数值模拟分析和现场试验相结合的方法，开展支座病害对大跨度钢桁梁桥振动特性影响研究，分析支座病害成因并设计整治措施，通过现场试验完成病害整治效果验证。研究结果表明：重载运输快速发展导致支座发生连接角钢断裂病害，支座病害改变了约束状况和桥梁结构受力特点，列车过桥时桥跨结构横向振动和竖向振动明显加剧，数值模拟结果和现场试验数据均验证了这一规律；通过拆除并更换原有连接角钢、抬高病害支座高程并保证支座水平等措施能完成病害整治，整治完成后桥跨振动显著降低，减振效果最大达到30%，效果显著。

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	陈树礼 1
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	刘永前 1
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	张彦兵1
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关键词 ：支座病害, 钢桁梁桥, 振动, 影响, 整治

Abstract：Bearing is the important component of the bridge structure and the technology conditions directly affect the whole bridge and train operation safety. In the 64m single-line through railway steel truss bridge of Shuo-huang Railway, the connection angle between bearing and truss girder is broken. The method of field experiments combined with numerical simulation is adopted to analyze the influence of the vibration characteristics and the damage reason, design renovation measures and verify the damage control effect by field test. The results show: Heavy-haul transportation development cause the connecting angle fracture damage of the bearing. The bearing damages change the constraint conditions and stress characteristics of the bridge structure, cause significant increase of the transverse vibration and vertical vibration of the bridge. The numerical simulation results and field test data have verified this regular. The bearing damage can be eliminated by replacing the original connection angle and changing elevation of the bearings, the bridge vibration can achieve significant decrease about 30% after renovation completed.

Key words： bearing damage steel truss bridge vibration influence renovation

收稿日期: 2016-03-03 出版日期: 2017-06-28

引用本文:

陈树礼 1，2，刘永前 1,2，张彦兵1,2. 支座病害对大跨度钢桁梁桥的振动影响研究[J]. 振动与冲击, 2017, 36(13): 195-200.
CHEN Shu-li 1,2, LIU Yong-qian 1,2,ZHANG Yan-bing 1,2. Vibration Influence of Large Span Steel Truss Bridge Accused by Bearing Damage. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(13): 195-200.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I13/195

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