Effect of Out-Of-Plane Loading on In-Plane Response of Sc Wall Piers

Abstract eng:
Steel-plate concrete (SC) composite shear walls are typically composed of steel faceplates, infill concrete, shear studs bonding the faceplate to the infill, and tie rods linking the faceplates. To date, most studies of these shear walls have focused on in-plane (IP) response and the effects of co-existing out-of-plane (OOP) loading have not been considered. Numerical studies are conducted to investigate the effect of OOP loading (magnitude and location) on the IP response of SC wall piers with different aspect ratios, reinforcement ratios, and axial loads, using the generalpurpose finite element code LS-DYNA. The baseline LS-DYNA model was validated for IP behavior using data from the tests of large-scale rectangular SC wall piers and for OOP behavior using data from tests of singly reinforced concrete specimens without shear reinforcement. The results of the parametric studies show that OOP loading has a significant effect on the IP capacity of SC wall piers; the effects become more significant as the shear span-to-depth ratio and magnitude of the OOP load are increased. As the magnitude of the axial compressive load applied to SC wall and/or the faceplate reinforcement ratio increase, the percentage reduction in IP lateral capacity is decreased.

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