Analysis Of The Dynamic Response Of Continuous Bridge Applying ANSYS

Dynamic response of bridge structures is an important subject of the bridge research field. It was affirmed that the vehicle moving loads would lead to more deformations and stresses for bridge structures than the equivalent static loads through both theories and practices. With the diversification of the vehicle-bridge forms and popularization of the bridge, the dynamical problems can not be ignored.In the dissertation, the dynamic response of a continuous box girder bridge of the provincial highway 106 Fu-transit line was analyzed in detail applying the ANSYS Parametric Design Language. The content of the researches are composed of two parts as follows:1,Assumed the bridge deck is smooth. The dynamic response of the bridge was analyzed adopting 300KN standards vehicle and five kinds of simplified model of vehicles to pass the bridge with different speeds, considering the impact of different frequencies of vehicles.2,The bridge was analyzed again when the deck roughness was simulated by Sine Function and compared with the condition that bridge deck is smooth, explaining the impact of deck roughness on the bridge vibration.There are received through analysis of the dissertation that the transverse direction vibration of bridge not only concerns its characteristic property closely but also relates to vehicle velocities, vehicle vibration and vehicle types. And, the impact of the deck roughness on bridge vibration can not be ignored.There are two aspects of the significance through the analysis:First, adopt the finite element software ANSYS parametric design language to analyze the dynamic response of bridge. Since the APDL is exact and convenient, it can be applyed to project practice.Second, simulate vehicle- bridge system model and test working condition by the finite element programming-ANSYS. Research the dynamic response of the bridge through the powerful post-processing function analysis of ANSYS. It greatly reduces the workloads compared with the program composition, but also avoids the difficulty of the program composition. Through the research, explain they are quite feasible that the method and the model adopted by the dissertation . There are important theoretical significance and practical value in the dissertation.