08.48: Double‐steel plate composite shear walls: In‐plane seismic behaviour

Abstract

ABSTRACTDouble‐steel plate concrete (SC) composite shear walls are a structural system intensively used in nuclear facilities due to its exceptional performance. It consists of a concrete core with exterior steel faceplates serving as reinforcement. These steel faceplates are anchored to the concrete infill using headed steel studs which guarantee the composite action between the two different materials. The focus of this research is the investigation of the seismic performance of rectangular SC composite shear walls for application to buildings. A simple and cost‐efficient form of the SC wall is proposed based on the research conducted by Vazouras and Avdelas [1]. Its efficiency has been proved through extensive numerical analysis using a simplified finite element model developed in ANSYS [2] to simulate the nonlinear cyclic response of SC walls. The accuracy of the developed numerical model was validated using experimental data reported in the literature [3, 4]. The numerical predictions included global force‐displacement responses, strain and stress distributions on each material and damage to the steel plates and concrete. A typical damage pattern of the SC walls included yielding, local buckling and tearing of the steel plates in conjunction with cracking and crushing of the infill concrete. The impact of various parameters on the in‐plane response of SC walls has been investigated including wall aspect ratio, reinforcement ratio, slenderness ratio, wall thickness, yield strength of the steel plates and uniaxial compressive strength of concrete.