Analysis On The Seismic Fortification Of Shuitu Jialing River Bridge

In the recent30years, the painful earthquake disasters around the world, especially the earthquake in Wenchuan and Ya’an caused great damages to the people.These disasters force human concentrate on the research of bridge earthquake-proofed. graduately, the theory and technical level has been improved. As being published of "guidelines for earthquake-proofed design of highway and bridges" and "rules of city bridge earthquake-proofed design ", which has been respectively established in2008and2011, people has paid more attention to the earthquake-proofed systems and latterly issued a "special proof techniques of earthquake-proofed fortification of municipal utilities "(built quality No.[2011]30), which makes clear a requirement on bridge:the main span of150m and above cable-stayed bridge, suspension bridge, cable supported bridges and arch bridges for earthquake-proofed special argumentation.388m main span bridge is a single span of soil and water, more than150m of the bridge, is a bridge, seismic fortification intensity is6degrees, the seismic fortification measures for the7class. The main contents include the following seismic analysis of structures:(1) the main motive force to establish reasonable calculation model of space should be used on analyzing the structure dynamic characteristics.(2) based on linear and nonlinear model, the method of response spectrum method and nonlinear analysis of the structure at two fortification levels (El earthquake and E2earthquake) should be tested.(3) according to the results of earthquake consequences, the structure at two probability level should be calculated to assure the safety evacuation.