Research on Rigid-flexible Continuous Transition Structure of Road-bridge Transition Section
In order to alleviate the problem of car-bouncing at bridge ends caused by the differential settlement of the road-bridge transition section of the traditional approach slab structure,a rigid-flexible continuous transition structure is proposed by deeply placing the approach slab and designing the first-level sleeper beam and the second-level sleeper beam,and the first-level sleeper beam and the second-level sleeper beam are cast-in-place with the approach slab to improve the stress distribution and deformation of the bridgehead subgrade.The ABAQUS finite element software is used to establish the two-dimensional finite element model of the road-bridge transition section of the traditional slab structure and the rigid-flexible continuous transition slab structure and to carry out calculations.The pavement settlement curves of the road-bridge transition section of the two structures are extracted,compared and analyzed,the treatment effects of the two structures under different geological conditions are studied by changing the geological conditions.The results show that the rigid-flexible continuous transition slab structure can realize the rigid-flexible coordinated transition of abutment and subgrade,and can alleviate the problem of bumping and secondary bumping at bridge head for road-bridge transition sections with different geological conditions.
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