ANALYSIS ON SPATIAL MECHANICAL PROPERTIES OF STEEL-CONCRETE SEGMENT WITH COMPOSITE CONNECTORS

In order to study the spatial mechanics behavior of steel-concrete segment with composite connectors,the paper took a three-span mixed continuous box girder bridge as project background.ABAQUS was used to establish a three-dimensional solid-plate numerical model,the transmission behavior of studs,PBL and its composite forms under different forces were compared.Finally,the shear transfer ratio of PBL and pin composite connectors was obtained.The results showed that:the shear transfer performance could be carried out safely under the design load.In the composite connector,the shear strength of PBL connectors was more,reaching 79.68%,while that of the stud connector was only 20.32%,and the proportion of shear transfer was about 4∶1.