Experimental and numerical study on the seismic performance of prefabricated ceramsite foam concrete sandwich shear wall

To achieve thermal load-bearing integration in reinforced concrete shear wall, this study innovatively proposes a prefabricated ceramsite foam concrete sandwich shear wall (CFCW), in which ceramsite foam concrete (CFC) is employed as an interlayer between normal concrete (NC) layers, effectively combining thermal insulation with structural strength. In this study, four full-scale CFCW specimens with different boundary elements were tested through quasi-static tests under varying axial compressive ratios.The results indicated that all the specimens exhibit primarily flexural failure modes, and an increase in axial compressive ratios enhanced the bearing capacity, initial stiffness, and energy dissipation capability of CFCW specimens while simultaneously reducing their deformation capacity. Furthermore, finite element models were established using OpenSees to simulate the seismic behavior of CFCW, and the results validated the effectiveness of the model. Building upon this, a parametric analysis of the finite element model was conducted, which provides significant reference for the engineering application of CFCW structures.