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Abstract
Steel plate shear wall (SPSW) is a lateral load resisting system consisting of vertical steel infill plate connected to the surrounding beams and columns and installed in one or more bays along the full height of the structure to form a cantilever wall. When buckling occurs in the infill plate of SPSW, a diagonal tension field is formed through the plate. The study of tension field behavior regarding the distribution and orientation patterns of principle stresses is important. The distribution of the SPSW panels along the building is required to be investigated. This technique has increasing popularity among constructors because it offers the potential for comparable with other traditional lateral load systems. Seismic performance at a possibly reduced construction cost. SPSWs have high lateral strength and stiffness that allows for fewer bays of lateral load resisting framing. The first major building employing the SPSW as lateral load resisting system was Nippon steel building built in 1970 in Tokyo (Astaneh. Asl 2001). Several analytical models have been proposed to describe the behavior of SPSWs. The most common three methods mentioned in Steel Design Guide 20 (SDG20), of American Institute of Steel Constructions AISC, are strip model method, orthotropic membrane modeling and nonlinear membrane model. In this thesis, a comparative study was preformed between membrane and strip models, to investigate the most accurate method in predicting both the drift and straining action induced in boundary elements.
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An analytical study using the finite element program SAP2000 was preformed to investigate the structural behavior of SPSW. The results obtained from the membrane model were verified with the SDG20 of steel plate shear wall example. In comparison with traditional bracing systems, A comparative study was performed between SPSW and bracing using nine floors building. The weight of SPSW is less than bracing system although the bracing section was pipe section. The drift of SPSW is bigger than bracing by 15 to 30% but the inter story drift is less than allowed (H/200). The high overturning forces expected in SPSW can be mitigated by the use of special configurations to distribute the overturning forces among multiple bays. Six-different configurations of SPSW that are arranged in the buildings’ perimeter as lateral load resisting systems were investigated in the presented study. The study was performed on buildings with 9, 20, 40 and 60 floors. It was concluded that distributing lateral forces among singular system of two bays of SPSW reduces the drift and staining actions in vertical boundary element (VBE) compared to dual system composed of one bay of SPSW, however the thickness of two bays of SPSW is chosen half of that of one bay of SPSW.