Studies On The Finite Element Analysis And Damage Identifiation Of Bridges Based On ANSYS

This paper,takes a continuous girder and a cable-stayed bridge of a cross-sea bridge as the research object, the finite element analysis models are established.Using the ANSYS software, the mode and the static structure analysis of the two bridges are accomplished. Several damage identification methods of the bridge are analyzed,and its accuracy is proved by example. The results and the method of this paper can provide reference datas for the construction of bridge health monitoring system.This paper has great reference value for other similar problems of future bridge project. The main research contents in this paper can be summarized as follows:1.By the modal analysis of continuous girder bridge and cable-stayed bridge, the top ten natural frequency and vibration models are obtained. By analyzing the results, the layout of the bridge power monitoring sensors for bridge health monitoring system is guided, and the basis is provided for structural damage identification.2.Using finite element analysis theory, the static analysis of continuous girder bridge and cable-stayed bridge is done by ANSYS software. By analyzing the stress-strain images, the biggest stress points are drawn, and the basis for the layout of the structure stress-strain sensors for bridge health monitoring system is offered.3.Through the analysis of existing damage identification method, combining with ANSYS finite element analysis software, several damage identification methods of the bridge are analyzed based on ANSYS, and the structural damage identification method based on vibration mode is proved by a example of continuous girder.