Abstract
This paper presents a novel steel-damping-concrete (SDC) composite wall as a vertical element for high-rise buildings and nuclear power plants etc. In an SDC composite wall, a damping layer is sandwiched between the concrete core and steel plates to reduce structural response based on its damping characteristics under axial and seismic loads. To ensure that an SDC composite wall exhibits a comparable compressive resistance as a steel-concrete-steel (SCS) composite wall, two types of reinforcing approaches including steel sheets and sleeves are utilized to enhance the weakness of the damping layer on the concrete core. The compressive performance of the reinforced SDC composite wall is numerically and analytically investigated using finite element (FE) simulations by ABAQUS. The influences of several key parameters including the type of reinforcement, the thickness of the damping layer, steel plates, and concrete core, the binding bar spacing as well as the diameter of steel sheets on the compressive performance of the composite walls are investigated through numerical analyses. The results show that while only embedding the rubber interlayer in the composite wall leads to the decrease of compressive resistance of the composite wall, the steel sheets and sleeves can provide the confinement effect on concrete core efficiently and improve the compressive resistance and ductility of walls. Based on the available methods in the current design codes such as Eurocode 4, AISC-360, a theoretical model is developed to predict the ultimate compressive resistance of SDC walls. The predictions show a reasonable correlation when compared with the numerical results.
Highlights
Steel-concrete-steel (SCS) sandwich composite structures consist of two steel plates and a central concrete core
With reference to the aforementioned considerations, considering the comparability of mechanical properties and failure mode between the composite structures and laminated hybrid structures [28,29], this paper introduces a rubber layer into SCS composite wall and proposes the steel-damping-concrete (SDC) wall to improve the performance of various aspects of this versatile composite wall including the energy absorption, anti-explosion, and impact resistance
Headed studs, interlocked J-hooks, and binding bars [35], as shown in Figure 3, were invented for SCS composite walls used in high-rise buildings and nuclear building to improve the integrity of composite walls
Summary
Steel-concrete-steel (SCS) sandwich composite structures consist of two steel plates and a central concrete core. There exist several studies, which investigated the effects of damping characteristics on One of these materials is rubber, which is commonly used for energy dissipation, impact resistance, sandwich box columns, where the damping core can be used as a viscoelastic layer (VEL), or an and protective design (ER). Thethe seismic performance reinforced concrete structures [28,29], this paper introduces a rubber layerexperimentally into SCS composite wall and proposes the that columns strengthened with bonded rubber plates was studied It was observed steel-damping-concrete (SDC) wall to improve the performance of various aspects of this versatile the equivalent damping ratio under peak load, the ductility, and the energy dissipation coefficient of composite wall including the energy absorption, anti-explosion, and impact resistance.
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