| Along with the rapid development of transportation business, the study of bridge structure even more in-depth. After 160 years difficult process, the study of vehicles-bridge coupling vibration has gained significant achievement. Bridge designers and researchers have been able to better take into account the dynamic response caused by dynamic load on the bridge, making the bridge structure have made great progress in applicability, durability and safety. However, because of the complexity of the problem, the study on vehicles - bridge coupled vibration are far from mature stage, the researchers in every national still need to Tremendous effortsIn this paper, We study the problem by model test, through this ancient and effective means to research vehicle - bridge coupled vibration. Experiment avoid many restrictions and simplifying in the theoretical studies, and there is no high cost , less controllable factors and other issues in real test of the bridge, so this is a good means and tools to study of the question.The subject use the 30mT-Section Beam Bridge as the prototype bridge, the full state of Dongfeng EQ3166 for the vehicle prototype, based on the similarity theory the bridge dynamic model and vehicle dynamic model were designed and produced, and we validated that the model meeted the similar requirements by experiment test, it can simulate the dynamic characteristics of the prototype really.Application of the bridge model and vehicle model to simulate the process of the vehicles passing the bridge and cause coupled vibration at particular speed. In the test, we changed the vibration characteristics of vehicle, vehicle speed, the position vehicle traveling on the bridge, bridge road conditions and other factors respectively, to examine the situation of these factors impact the coupled vibration of the bridge. Through detailed analysis of test data collection in experiment, we studied the the relevant laws of vehicle - bridge coupled vibration. |
