Study On Seismic Response And Seismic Performance Of Double Column Thin-walled Pier Continuous Rigid Frame Bridge-fuyan Bridge

Our country is an earthquake-prone country,earthquake happened many times in recent years.The destructive earthquake caused a very heavy casualties and property losses,such as Wenchuan 8.0 earthquake in Sichuan 2008,the death and missing is more than 87000 people in total,causing a direct economic loss of 845.1 billion.In the earthquake disaster,bridge was greatly damaged,which cutting off the roads to the quake zone and bringing great difficulties to the rescue and relief work.Earthquake disasters occur repeatedly highlightsthe importance of studying the earthquake response of the bridge.With the developing of the research and practice on bridge,the continuous rigid frame bridge structure,construction is convenient,cost is economic and reasonable driving comfortable became evident advantages,which has advantages in 100?300 m span range,but its design theory and construction technology still have some problems.In this paper,depend on large numbers of references,the finite element model of the continuous rigid frame bridge(Fuyang bridge)is established,combined with the current specifications and using the finite element program MIDAS CIVIL,the structure calculation program.And the static performance of the construction phase and operation phase load condition and the effect of bridge arch degrees are calculated.In terms of dynamic performance,this paper studies the natural vibration characteristics of continuous rigid frame bridge(Fuyang bridge),using time history analysis method to analyze the bridge response under earthquake ground motion input in different directions,the girder of the bridge pier height,root of depth-span ratio,thickness and double limb spacing used natural frequency of vibration of continuous steel structure bridge,the influence of seismic response,provide a reference for construction and design of bridges.