PUSH-OVER method for earthquake damage prediction of Bridge Engineering

Abstract

The bridge is an important transportation hub, especially the bridges on the main traffic arteries. Once the bridges are subjected to earthquake damage, there will have a great impact. Therefore, it is necessary to study the earthquake damage prediction of bridge engineering. The prediction will ensure the safety and reliability of the bridges and other lifeline engineering. And we can take the necessary measures to mitigate disasters according to the prediction results. So the PUSH-OVER method for earthquake damage prediction of bridge engineering is put forward in this paper. And the domestic and foreign research results of seismic resistance of the bridge engineering are combined in this method. Taking a large bridge project as an example in this paper, the anti-seismic checking calculation of the bridge is carried out. And the seismic performance evaluation results are obtained through the checking calculation. PUSH-OVER method is a kind of nonlinear static analysis method, which is based on the analysis of the structure imposing monotonic increasing load. The method can be used to study the nonlinear performance of the structure under seismic excitation into the plastic collapse state. In this method, the structure of adjacent expansion joints is considered as the independent frame of space. And it is assumed that the upper structure is relatively rigid in the horizontal plane. The initial stage of the analysis is to analyze the independent collapse process of the single row in the direction of the concerned, the direction of the bridge or the transverse direction of the bridge. Through the analysis, the whole damage process and deformation characteristics of the component under monotonic increasing horizontal load are obtained. The monotonic increasing horizontal force is applied on the frame center of mass, it is usually the center of mass of the upper structure. And with the nonlinear development of the framework, the stiffness of the bridge pier and the stiffness of the