The Quasi-static Experimental Research Of Steelplate-concrete Composite Centilever Beam

In recent years, the steel-sandwich-concrete (SC) composite structures are widelyused in nuclear containment building, submarine tunnels, oil storage tanks and otherstructures. Westinghouse Company adopted SC composite structure in the AP1000nuclear containment building. Compared with conventional prestressed concretestructures, SC composite module can effectively improve the impact resistance andseismic capacity of nuclear containment building, and accelerate the constructionprogress of the containment, thus reduce the construction costs. However, there arerarely researches about the seismic performance of the SC module, and the mechanicalbehaviors of nuclear containment building in the earthquake are very complex. Thisstudy intends to investigate the seismic performance of nuclear power plantcontainment, the seismic performance of the cross-section of the SC compositestructural members is firstly studied and then the seismic capacity of SC compositestructure cantilever is determined by the quasi-static test as well as the finite elementsimulation. The main contents and conclusions are as follows:(1) Through the quasi-static test of a SC composite structure cantilever member,the failure state, hysteresis curves, skeleton curves, the effective stiffness, as well as thestress distribution of steel-plate, concrete and Cross Tie and the law of the interfacialslip.are investigated. Meanwhile the seismic performance of the cantilever specimen isanalyzed, including deformation restoring capacity, energy dissipation capacity andequivalent viscous damping.(2) Based on the research about the shear of the pegs in the steel-concretecomposite structures and the test result of the SC composite cantilever about theinterfacial slip and the stress of steel and Cross Tie, the mechanical properties of theCross Tie about shear slip in the interface of the specimen, including the ultimate shearcapacity, the design values, and the model of Cross Tie about the shear capacity-slipdisplacement relationship in the interface are investigated.(3)The finite element model of SC composite structure cantilever member isestablished by ABAQUS. The validity of the finite element model, especially for theshear capacity-slip displacement model of the Cross Tie at the interface is verified,through comparing the model with test results. Meanwhile, the effects of steel-platestrength and Cross Tie strength on the static performance of the cantilever componentsare investigated.