The Application And Analysis Of Key Technologies Of Ziyou Bridge Renovation Project

With the increasement of the investment in public transportation,Transport infrastructure such as roads and bridges develop rapidly.Under the background of booming bridge construction,the safety and reliability of bridge structures have attracted more and more attention.The continuous bridge accidents in recent years have reminded that,the bridges with damages that will bring structureproblems,must be rebuiltimmediately.The bridge rebuilding means demolishing sections of bridge which have structure problems,redesigning and rebuilding the sections of the bridge in the same place.For the reasons of the complex traffic conditions,the high requirement of the environmentand theproject duration,The bridge rebuilding is extremely difficult.So,study on the rebuildings of bridges that providing references for other similar projects is very necessary.Taking the project of the rebuildings of the Ziyou Bridge in Changchun City as an example,a exhaustive study on the key technologies of the demolishing and rebuilding has been finished.Deck steel structure rigid frame arch is simulated,main arch rib,beam strength and stiffness are calculated,anti-overturn,structural fatigue and structural components stability of the Ziyou Bridge is analyzed,by using a finite element model with Midas Civil2015.