Abstract
To improve the space utilisation rate and seismic performance of high-rise buildings, a new seismic structural system, this paper proposes a buckling-restrained steel plate shear wall (SPSW) with a concrete-filled L-shaped built-up section tube composite frame. In this composite shear wall system, the columns in the frame are composed of hot-rolled carbon steel H-section members and carbon steel square hollow section tubes, which are connected by steel plates and filled with concrete, and the SPSW is comprised of an embedded steel plate and several pairs of cold-formed steel hat-section buckling-restraining strips. To study the seismic performance of this new type of shear wall system, two specimens were prepared and tested under a horizontal cyclic load. The test results showed that the two specimens had a high bearing capacity, good ductility, and good energy dissipation capacity. This indicated that the new shear wall system was reliable and effective at resisting lateral forces. Finite element models were established and validated against experimental results. Based on the results of a parametric analysis, a value of 0.85 was proposed for coefficient η to modify the method based on the plate–frame interaction theory, which could be used to calculate the bearing capacity of the buckling-restrained SPSW with the concrete-filled L-shaped built-up section tube composite frame.
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