The research and application of assembled bridge deck system is helpful to further promote the level of industrial construction of railway bridges.In order to evaluate the safety,rationality and feasibility of the design and fabrication process of the new type of integral bridge deck accessory structure,according to the stress response and failure mode of the prefabricated bridge deck accessory protective wall structure under horizontal load,the design and manufacture of full-scale model,test scheme design and whole process failure test were carried out and compared with finite element simulation analysis.The stress characteristics,deformation law and bearing capacity of each member and connecting member were obtained.The results show that the bearing capacity of the protective wall during the measured failure is 1.65 times of the design value,and the fabricated protective wall of the ancillary facilities on the bridge deck can meet the design requirements and has a good degree of safety,which ensures the operation safety of the high-speed railway bridge.At the same time,the simulation method of the protective wall of the precast bridge deck ancillary facilities based on the ABAQUS platform is obtained,the maximum deviation of the peak value is less than 0.7%,and the maximum deviation of the loading process is less than 2.8%,which verifies the effectiveness of the simulation method proposed in this paper,and shows that the finite element model can accurately predict the actual stress state of the structure.
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