Analysis Of Dynamic Response And Study Of Performance Test Method Of Bridge Based On Vehicle Velocities

Vibrational test is developing fast for its little work, low cost, short testing time and convenient operation so as well no damage to the structure. Now this test is almost the indispensable test content of the bridge testing. But bridge is a huge system forming with different kinds of material and different structure, every part is complex and the dynamic characteristics differ much, so some single indicator of dynamic behavior can't achieve good results of assessmenting the whole structure's state. So, this article considers the major factors of causing the bridge vibration and combines more vibrational parameters to assess the bridge performance from some sides to study as following.And using the ANSYS FEM program as supplementary analysis to make vibrational test more accurately and reliably in the test of common bridge structure.(1)Using vehicle velocities to create vibration to establish the relations of span of bridge, deck roughness and the load speed of the vehicle and bridge impact coefficient.(2)Considering the effect of the deck roughness to the vibration that existing norms not solute well,using ANSYS FEM program to analyze, and considering the effect of the deck roughness coupling with the speed of the vehicle, the vibration frequency of the vehicle and the span to the bridge's effect and the degree of the effect at the same time.(3)Using the method of vehicle velocities to create vibration and reasonable test means to test the bridge's dynamic response accurately. Though analyzing to obtain the bridge's dynamic behavior and other related parameters, and combining the ANSYS FEM program's numerical simulation to evaluate the bridge reasonably and accurately.(4)Using the modal parameter identification method makes the assistance judgment of the bridge performance.