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| Vibration Influence of Large Span Steel Truss Bridge Accused by Bearing Damage |
| CHEN Shu-li 1,2, LIU Yong-qian 1,2,ZHANG Yan-bing 1,2 |
1.Structure Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang 050043;
2.The Key Laboratory for Health Monitoring and Control of Large Structures Hebei province, Shijiazhuang 050043 |
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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.
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Received: 03 March 2016
Published: 28 June 2017
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