Abstract
The steel plate shear walls (SPSW) are currently being considered as a lateral load resisting system. A numerical method was proposed to have a comprehensive comparison of seismic behaviors of the plane wall (PW) and stiffened plane wall (SPW) with different stiffener characteristics, having the same weight, by using finite element modeling (FEM). The model was validated by using previously published experimental works. The material and geometric nonlinearity were taken into consideration. In this paper, the effect of using stiffeners with different cross-section shapes and directions will be studied, and key issues, such as load-carrying capacity, stiffness, and energy dissipation capacity, were discussed in depth. It was found that the proposed SPW with horizontal L, T, and U stiffeners could effectively improve load-carrying capacity by about 4, 20, and 23%, respectively. Diagonally and horizontally, SPWs with U stiffeners have higher energy-dissipation capacity than PW by about 57, 50%, respectively. This method provides a combination of high-performance stiffeners form and material for improving the seismic behavior of SPW.
Highlights
The steel plate shear walls (SPSW) is used in many countries as a lateral load resisting system, due to its advantages over the concrete walls such as high ductility, good seismic behavior, easy retrofit, lightweights, and less footing depth
Several works were conducted on the plane wall (PW) system to evaluate its seismic performance, load-carrying capacity, stiffness, ductility, and energy dissipation capacity [2,3, 6–18,]
A lot of studies had worked to delay the buckling behavior of PWs using stiffened plane wall (SPW), which can be stiffened by vertical slits [8, 15,16], cross, or diagonal stiffeners [4, 11, 13, 14]
Summary
The SPSW is used in many countries as a lateral load resisting system, due to its advantages over the concrete walls such as high ductility, good seismic behavior, easy retrofit, lightweights, and less footing depth. This paper studied the effect of stiffener cross-section shape L, T, or U and stiffener direction under cyclic loading test Fig. 1.c. This paper studied the cyclic nonlinear behavior of PW and SPWs. Finite element models were developed by using ABAQUS software [19]. Load-carrying capacity, stiffness, degradation characteristics, energy dissipation- capacity, fracture tendency and out-of-plane deformations were analyzed and compared for different models. Boundary Conditions and History Loading The nonlinear cyclic analysis was conducted on groups of thin PW and SPWs. The lateral displacement was applied to the exterior column flange. The material of infill panels and boundary elements was SM490 with yield stress fy = 330 MPa. The cyclic constitutive model was used to simulate the cyclic hardening, local buckling, and degradation characteristics due to cyclic loading. -1600 -125 -75 -25 25 75 125 Top Displacement, mm Figure 3: Compare between results of experimental and numerical for WC4T specimen
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