| Composite steel plate shear wall has high lateral stiffness and good energy dissipation capacity, which can provide an effective lateral force resisting system for high-rise building. In this paper, the precast infill steel plate-concrete composite shear wall(PCSW) were studied by four kinds of different forms of PCSW model tests under low cyclic loading, the finite element model was established with the finite element software ABAQUS, simulation and the experiment results were compared in order to verify the correctness of numerical model, a parametric study was then performed on it to study the effect of different variables such as layout of rubber strips, thickness of precast concrete slab and bolt spacing-to-steel thickness ratio futher. The main research work and the conclusions are summarized as follows:1. A newly precast infill steel plate-concrete composite shear wall is preposed. The shear wall is a lateral resisting component, which consists of infill steel plate and precast concrete slab, moreover, rubber applied in reserved gap of precast concrete slabs and surrounding menbers. This kind of component contains superior performance that it has high capacity, clear energy dissipation mechanism and green, moreover, it can be assembled on the spot easily. The infill steel plate is prevented from buckling by the precast concrete slab effectively under the earthquake and strong wind load, which improves seismic performance of PCSW.2. Four 1/3-scaled one-story one-bay PCSW specimens were designed: composite shear wall with surrounded gap(YLF-PCSW), composite shear wall with surrounded rubber strips(ZB-PCSW), composite shear wall with vertical rubber strips(SX-PCSW), composite shear wall with surrounded and horizontal rubber strips(ZBHX-PCSW). The experimental research was performed on them under low cyclic loading. It is shown that the designed specimens have good bearing capacity and energy dissipation capacity, the infill steel plate is prevented from buckling by the precast concrete slab effectively, ensuring that the infill steel plate resists lateral load in plane, the SX-PCSW is optimal of them.3. It is shown that the designed specimens has failure mode that infill steel plate cracks, concrete slabs and rubber strips remained intact yet. Buckling with wave-like shape appears in surrounded gap region for the specimen YLF-PCSW, the failure acurs in the corner region finally. The intensive grid scratches appears in the contact area between the concrete slab and infill steel plate for the specimen SX-PCSW, the tearing failure acurs in infill steel plate and beam flange connected area finally. The tearing appears in the transverse rubber strips nearby for the specimen ZBHX-PCSW, and it is more serious in the upper transverse strips than in the lower strips, it presents obvious shearing failure mode.4. The finite element models of PCSW and ordinary steel plate shear wall(SPSW) were built up by the finite element program ABAQUS. Numerical predictions and the experimental results were compared in order to verify the correctness of the established finite element models, the PCSW and SPSW were compared and analyzed futher. It is shown that the hysteretic curves of simulation are in good agreement with experimental hysteretic curves, the ultimate bearing capacity of specimens is similar, and the maximum error is 12%.The stress distribution from simulation analysis and deformation shape and failure characteristics of specimend are consistent,which verify the correctness of the numerical models. The hysteresis curves of SPSW has obvious pinch phenomenon, while ZB-PCSW is plumper, the energy dissipation increases evidently. Compared with the SPSW, ZB-PCSW has higher initial stiffness and ultimate bearing capacity, the initial stiffness increased by 50.9% among them.5. The parametric study with 31 kinds of simulation conditions was then performed on it to study the effect of different variables such as layout of rubber strips, thickness of precast concrete slab and bolt spacing-to-steel thickness ratio, respectively. It is shown that vertical rubber strips adopted in PCSW has high lateral stiffiness and ultimate bearing capacity. Stresses of infill steel plate are decreased by the introduction of concrete slabs effectively, compared with the other three kinds of composite steel plate shear wall, the stress and out of plane deformation of infill steel plate of SX-PCSW are smaller. By increasing the reinforced concrete panel thickness up to a specific value, the shear capacity and the ultimate strength enhance; On the contrary, by increasing it beyond the specific value, the shear capacity and the ultimate shear strength of PSPSW do not boost basically. Thickness of concrete slab has little effect on the ductility of PCSW. With the smaller bolt spacing-to-steel thickness ratio, the hysteretic curve of composite shear wall is relatively plumper, its energy dissipation capacity and bearing capacity are higher accordingly. |
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