Abstract
This study investigates the influence of nonshear components on the shear performance of cold-formed steel (CFS) framed shear walls. Regarding the connection fields between nonshear components and shear walls as reinforced edge members (REMs), full-scale model tests of six gypsum board sheathed CFS framed shear walls were conducted with a focus on investigating the shear behavior of CFS framed shear walls with enlarged edge members. A numerical simulation method for predicting the shear performance of CFS framed shear walls with enlarged edge members was established and verified. The results show that, (1) After the “diaphragm effect” was weakened or even eliminated, the REMs still had the ability to resist the bending moment and shear force, preventing CFS structures from collapse. (2) The REMs (containing wing walls) changed the mechanical feature of CFS framed shear walls that depended only on the “diaphragm effect” to resist the shear force and transformed the wall’s plastic development mechanism, improving the energy dissipation capacity of the walls over four times. Such a “wing wall effect” should be considered when estimating the influence of nonshear components. (3) The recommended response modification factor should be increased by at least 1.3 times due to the REMs. (4) The relative errors between the simulated and test results were within 8%.
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