Study On Anti-seismic Factors Of Long-span Continuous Rigid Frame Bridge

Bridge is the throat of road system,which is an important part of road trafficnetwork.No matter how long the brige is,once damaged,there would be a paralysis inroad traffic network.Continuous rigid frame bridge has the advantages of long span、reasonable force distribution and strong adaptability. It has become the preferedchoice in the area where is full with deep groove and other complexterrain.Continuous rigid frame bridge as a lifeline engineering plays an important rolein the earthquake rescue. Because of the long span,the high piers with differentheights,its dynamic characteristics is also much complicated，its seismic response isquite different from the common span bridges.The anti-seismic performance of thisbridge can be influenced by many factors with different degrees,such as the pile-soilinteraction，the section form of bridge pier section,the height of bridge piers, theapplication of Lead-Rubber Bearing. Using large finite numerical simulation softwareMIDAS/Civil and focusing on researching the influences to anti-seismic performanceof the bidge caused by pile-soil interaction、 parameters of the piers and theapplication of LRB.（1）Summarizes briefly the seismic analysis theory in current engineering and thebasic method of seismic design.（2）Establish dynamic calculation model of continuous rigid frame bridge，analysis the continuous rigid frame bridge seismic response.Summarized the responsecharacteristics of continuous rigid frame bridge seismic.（3）Researeh the interaction of pile-soil for bridge seismic. Pile-soil interactionshould be considered based on the actual geological conditions when conductingseismic design and select a hard venue.（4）Researeh the interaction of pier form for bridge seismic，propose someseismie concept design based on the pier form selection.（5）Analysis of the bridge seismic effect over the use of LRB.Provide referencefor seismic-isolation design of Large-span continuous rigid frame bridge.