Abstract
This paper reports an investigation into the behaviour of wood-steel composite shear walls, consisting of strand laminated lumber boundary frames with infill steel plates. Recently it has been shown that wood-steel composite shear wall systems can offer various advantages over code-approved wood frame shear walls, including architectural flexibility. However, further research is needed so as to gain a better insight and understanding into the structural behaviour of this lateral load resisting system. On this basis, three-dimensional full-scale finite element models are developed and used to simulate the wood-steel composite shear wall with solid infill plates and with centrally-perforated infill plates. In this paper, firstly, a three-dimensional finite element model of wood-steel composite shear wall under monotonic loading. The numerical results were compared with experimental data and it was found that the model can predict the behaviour of wood-steel composite shear walls with reasonable precision. Using the verified model, a parametric study on wood-steel composite shear wall models with and without openings was performed. Critical parameters influencing the wood-steel composite shear walls behaviour such as the thickness of the steel plate and the opening ratio were investigated. The results of this parametric study provide useful information for the engineering application of wood-steel composite shear wall systems.
Highlights
A wood-steel composite shear wall (WSCSW) is a new-type lateral load resisting system, consisting of vertical steel plate infills connected to the surrounding engineered timber beams
In the first part of this work, a detailed three-dimensional finite element model was developed in order to study the nonlinear behaviour of wood-steel composite shear wall systems under monotonic loading
The numerical model was simulated with laminated strand lumber (Table 3) boundary frame members, and was constructed in such a manner as to facilitate further parametric analyses
Summary
A wood-steel composite shear wall (WSCSW) is a new-type lateral load resisting system, consisting of vertical steel plate infills connected to the surrounding engineered timber beams. Following the SPSW design, a typical wood-steel composite shear wall comprises a steel infill plate that is allowed to buckle in shear and develop tension field action under lateral loading, while the engineered wood framing members remain essentially elastic. The engineered wood product used in [2], for the frame members of the wood-steel composite shear wall, was the commercially produced laminated strand lumber (LSL). It is common among scholars to simplify the input values for radial and tangential direction, this can be seen on the numerical modelling of hybrid steel framed with cross laminated timber infill shear walls – STSW [13], bolted hybrid connections [14], steel-timber composite floors [15], and hold-down connections for masstimber buildings [16]. This paper conducts a necessary extension of the research on this issue
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