Research and Application of Method for Connecting New to Old Bridge and Stress Force Analysis in Bridge Widening Works
Based on actual projects,the method of connecting old to new bridge was studied,complete with the invented expansion and settlement devices for the connection between old and new bridge.A finite element model was used to simulate and analyze the change of internal force,displacement and deformation of main girder resulting from old bridge widening.The results show that the above method can level the bridge surface at the intersection of expansion and settlement joints,prevent the bridges from water and dust.Its internal force decreases a lot under the load of moving vehicles after main girder of the old bridge is widened,however,the internal force of the new bridge increases accordingly,which indicates that the new bridge bears a certain load instead of the old bridge,and the connected bridge structure has better integrity and bears evener stress force.
old bridge wideninghollow slab girdersexpansion jointsinternal forcemain girder deformation
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