Mechanism and Design Method of Load Transfer into Concrete-Filled Steel Tubular Arch Ribs through Perfobond-Rib-Shear Connectors

In terms of load transfer, the design joints in concrete-filled steel tubular (CFST) arch bridges is more critical than that buildings due to higher likelihood steel–concrete-interface debonding. To improve contact at steel–concrete interface, a novel rib was manufactured by longitudinally welding perfobond-rib-shear connectors inner surface tube and then filling with concrete. this study, extensive numerical analytical investigations on mechanism introducing loads into CFST ribs through were carried out. A deck bridge, namely, Shuangbao Bridge China, selected as typical application location. The parameters, including geometric dimensions connector arrangement perfobond along cross-section longitudinal section rib, evaluated. flow for joint between vertical columns proposed. load-transfer efficiency, scheme optimized replacing weld studs ribs. Significant increases 1.84–4.02 shear resistance found compared welded studs. Additionally, fabrication convenient