Analytical Study on Prestressed Concrete Box Girder Bridges with Corrugated Steel Webs Using Asynchronous-pouring-construction Technology
Asynchronous-pouring-construction(APC)technology for prestressed concrete girders with corrugated steel webs(PCGCSWs),making full use of corrugated steel webs(CSWs)to support the hanging basket,dividing the top/bottom slab and CSWs into multiple independent working platform,which is a novel and efficient construction technology.In order to study the safety and reliability of cantilevered large span segment of CSWs during the APC of hanging basket,the actual project Beijing Damogou Bridge is used to establish a full-bridge model using Midas Civil.Based on the characteristics of the bridge's large-segment CSWs'support force,ABAQUS is used to establish the local models under critical conditions to study the effect of CSWs'length on the deformation control of APC.The calculation equation of segment deformation is derived.The results indicate that the structure is safe during the APC process,and the cantilever length of CSWs has a large effect on the deformation before and after pouring.The structure presents three different force patterns from the cantilever end to the N-1 segment,the N segment,and the N+1 segments during APC process.The theoretical deformation coincides well with the actual deflection,which can provide a reference for the APC of PCGCSW.
万方数据
维普
