| 重载运输下大跨度钢桁梁桥病害分析及试验研究 |
| Analysis of Disease and Experimental Research of Long Span Steel Truss Bridge Under Heavy Haul Transport Conditions |
| 投稿时间：2013-10-21 |
| 中文关键词:重载铁路 钢桁梁桥 病害分析 性能试验 |
| 英文关键词:heavy load railway steel truss bridge disease analysis operation performance test |
| 基金项目:铁道部科技研究开发计划(2012G011 A) |
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| 中文摘要: |
| 随着重载运输的不断发展，铁路钢桥病害日益凸显。以朔黄铁路64 m下承式钢桁梁为对象，对其出现的典型支座病害的成因、处理方法和病害对桥梁运营的影响进行了系统的分析研究。研究结果表明：由于4个支座之间存在高低不平，且支座表面存在一定程度的不平整，支座部位构件产生了一定程度的初始应力，在重载列车的反复作用下，导致支座联接构件出现疲劳断裂破坏，进而引起桥跨结构跨中横向加速度、竖向振幅的急剧增大和主桁杆件受力的显著变化，危及行车安全。通过更换结构部件和改变支座高程的方法能够消除支座病害影响，整治效果显著。 |
| 英文摘要: |
| With the development of heavy haul transportation, the disease of railway steel bridge is increasing prominently. Taking the 64 m through steel truss bridge of Shuohuang Railway as the research background, this paper makes a systematic analysis on the three aspects associated with the diseases of the bridge support, including the causes of the disease, the treatment method and the diseases impact on bridge operation. The results of the study show that because of the unevenness between the four bearing supports, and a certain degree of roughness of the support's surface, a certain degree of initial stress is produced in bearing components. The repeated effect of heavy haul train would lead to the fatigue fracture of the support connection components, hence a sharp increase of transverse acceleration and vertical amplitude at the middle of the span, and significant changes of primary truss stress, which would endanger the safety of train operation. The ill effect can be eliminated by replacing structural parts and changing elevation of the supports, and the treatment effect is remarkable. |
| 张二田.重载运输下大跨度钢桁梁桥病害分析及试验研究[J].石家庄铁道大学学报：自然科学版,2014,(2):6-11,18. |
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