Seismic Fragility Analysis of Precast Concrete Sandwich Wall Panel Structure

This study presents the seismic fragility analysis of a two-story precast concrete sandwich wall panel structure (PCSWPS) with bolt connections through numerical analysis. A finite element model (FEM) consisting of multi-layer shell elements and nonlinear springs is established and analyzed, which is verified by comparison with shake table test results. Seismic fragility curves are constructed based on the Latin hypercube sampling Monte Carlo simulation (LHS-MC), enabling rapid evaluation of the seismic performance of PCSWPS. The results demonstrate that the developed FEM accurately reproduces the dynamic structural responses of PCSWPS. The seismic fragility analysis shows that the PCSWPS with novel dry connections exhibits good seismic performance, which is reliable, repairable, and resistant to collapse under rare earthquakes.