Based on the reconstruction project of Wangyuhe Bridge on Taicang-Changzhou section of Shanghai-Wuhan Express-way,the widening scheme of large cantilever prestressed concrete box girder was studied.Midas software was used to establish the finite element model of the whole bridge,and the structural stress characteristics of the bridge under the influence of live load,foundation settlement,shrinkage and creep were analyzed.Key problems of each widening scheme were summarized,and the construction suggestions were given.
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