| With the rapid development of the composite box-girder bridge with corrugated steel web, shear connectors as its key component have been paid more and more attention. Among them, PBL shear connectors are used widely, because it has the characteristic of large shear stiffness and good ductility. The current research on PBL shear connectors of the composite box-girder bridge with corrugated steel web is not yet mature. There is no unified specification which explicitly stipulates the design of PBL shear connectors in China.Regard the PBL shear connectors between the corrugated steel web and top concrete board of the composite box-girder bridge with corrugated steel web as the research object, consider four factors and design 11 types static load specimens. Combining the model test with nonlinear finite element analysis, PBL shear connectors are studied in detail. The main research content is as follows:The failure process and the failure pattern of specimens is described, and the specimen is divided into four categories according to the failure pattern and then the load-bearing mechanism and the load-slippage rule is analyzed. The qualitative influence of steel plate hole diameter, throughout bar diameter, plate thickness and prestressed steel to the bearing process and failure pattern of connector and the quantitative influence of them to the bearing capacity is analyzed. In order to verify test results, the nonlinear analysis of the test loading process is finished by building ANSYS finite element analysis model. Finally, combining with the finite element results and test results, a design method of PBL connector is proposed. |
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