Vibration analysis of a longspan bridge with a pedestrian and nonmotor system caused by vehicle excitation
MA Rujin1,CUI Chuanjie1,HU Xiaohong1,HU Teng2
1. College of Civil Engineering, Tongji University, Shanghai 200092, China;
2. Consulting and Supervision Center for Highway Engineering of Hubei Province, Wuhan 430030, China
In this paper, to figure out the pedestrian and nonmotor system vibration caused by vehicle loads in city bridges, a vibration analysis method was established based on the vehiclebridgeinteraction theory. The maximal acceleration responses with different vehicle speeds and road roughness were calculated with an example of a longspan extradosed cable stayed bridge, and some suggestions were given to control the pedestrian and nonmotor system local vibration. The study shows that with the same vehicle speed and road roughness, the maximal acceleration of pedestrian and nonmotor system was much larger than the main girder, the acceleration responses were increased with road roughness, but it does not have a clear relationship in terms of vehicle speed. By increasing the cantilever stiffness, deck stiffness and the pedestrian and nonmotor system’s overall stiffness, the local vibration problems of middle span pedestrian and nonmotor system were effectively controlled, but increasing deck stiffness does not have a clear effect for side span local vibration. By the frequencydomain analysis, from the middle span to side span, the pedestrian and nonmotor system vibration is gradually controlled by the highorder vibration modes.
马如进1,崔传杰1,胡晓红1,胡腾2. 车辆激励下大跨径桥梁人非系统振动特性[J]. 振动与冲击, 2018, 37(12): 96-101.
MA Rujin1,CUI Chuanjie1,HU Xiaohong1,HU Teng2. Vibration analysis of a longspan bridge with a pedestrian and nonmotor system caused by vehicle excitation. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(12): 96-101.
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