Discussion on Seismic Reinforcement Methods of Current Bridges

China is a seismic country, which not only has its own features of high intensity and frequency but also has a wide range of distribution. The bridge, as the transportation hub engineering of lifeline,will endanger people's safety of life and cause huge economic losses,and meanwhile hinder the relief and reconstruction in disaster area once damaged in the earthquake. Based on the documents of bridge seismic reinforcement methods from home and abroad, a preliminary research and analysis are conducted and the basic structure of the form and corresponding seismic reinforcement methods of the current city bridge are summarized, moreover, the preliminary induction and analysis are also carried on. The study will have important significance to existing bridge seismic reinforcement methods, as well to the reasonable seismic design and seismic construction measures of the newly built bridge.