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Bing Lu,Chang-Hai Zhai,Shuang Li,Duofa Ji,Xianbin Lu 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.5
The existing push-out test results showed that the ultimate shear capacities and ultimate slips of tie-bars and studs under cyclic loading were signifi cantly lower than those under monotonic loading, which could signifi cantly aff ect the seismic performance of steel–plate concrete composite (SC) structures. The fl exural behavior of two SC beams subjected to cyclic loading was investigated. Specimen SCB1 using tie-bars was partial shear connection, and specimen SCB2 using tie-bars and studs was full shear connection. The failure modes, hysteresis curves, skeleton curves, equivalent lateral stiff ness, energy dissipation, interfacial slip distribution, interfacial shear distributions, and strain in steel plates were researched. The experimental results show that two SC specimens were brittle failure, which primarily resulted from premature shear fracture of shear connectors at the interfaces between steel plate and concrete. Finally, two existing codes for SC structures were used to analyze the bending moment and shear of SC beams as well as interfacial shear of tie-bars and studs. This indicates that due to the diff erence of shear connection ratio between two specimens, the interfacial shear distributions of two SC beams were signifi cantly diff erent.
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