This article took the double deck departure bridge of Beijing New Airport as the background to in-troduce the key technical points of the structural design of double deck bridges in high intensity areas.The bridge deck width of this project is relatively large,and the piers and columns are co-constructed with the base-ment of the terminal building.There are many difficulties in the main structure design,such as co-construction effect,wide bridge effect,stiffness mutation,and bearing capacity mutation.This article first introduced the structural design of the bridge and the process of selecting the bridge type,then systematically studies the static and dynamic characteristics of the double-deck elevated bridge,summarizes the technical factors to be consid-ered in the design,node construction,earthquake resistance,and key technical issues in disaster reduction..It also studied the feasibility of improving the construction technology of steel box girders.The structural design and optimization design ideas of the double-layer departure bridge introduced in this article would provide refer-ence for the design of similar projects in the future.
Double-decker departure bridgeStructural systemFinite element modelEarthquake preven-tion and disaster reduction
NETL
NSTL
万方数据
