Optimal design of segment storage and hoisting of segmental prefabricated corrugated steel web composite box girder
To optimize the segmental division,storage and hoisting scheme of segmental prefabricated corrugated steel web composite box girder bridge,taking the approach bridge of Nanjing Yangtze River Fifth Bridge-Lixin Road Crossing Bridge as research background,the numerical simulation was used to verify the reasonable partition length of composite beams with corrugated steel webs.The stress and deformation characteristics of standard beams during storage and hoisting period were analyzed,and the reasonable control measures were proposed.The results show that when the segment length is from 240 cm to 400 cm,it has little influence on the flexural capacity of beam,and the reasonable segment length of composite beams with corrugated steel webs depends on hoisting and transportation conditions.The number of storage layers of section beams should not exceed 2 layers.If double layers are used for storage,the temporary rigid bracing should be set between the concrete top and bottom plates of section beams with corrugated steel webs.Four hoisting points should be adopted for section beam hoisting with four hoisting points set near the web,and the temporary rigid bracing should be set between the top and bottom plates during hoisting to avoid the excessive deformation of roof and the increasing difficulty of on-site assembly control.
corrugated steel websegment prefabricatedsegment lengthstorage stagehoisting stagetemporary rigid bracingfinite element model
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