Finite Element Analysis of Precast Concrete Wall Joints Under Lateral Loads: A Comparison of Different Modeling Approaches
摘要
Joints in precast concrete elements exhibit different loading responses compared to continuous cast-in-place concrete. However, modeling techniques for analyzing and designing precast wall structures have not been clearly demonstrated. This study focuses on the behavior of precast concrete wall joints under lateral loading, using finite element analysis, evaluating four modeling approaches: Cast-in-Place (CIP), Cast-in-Place with Hinge Support (CIP-H), Connecting Node (CN), and Spring Model (SM). Both the SM and CN models demonstrated close agreement with experimental data regarding load-displacement behavior, maximum shear strength, and stiffness. However, the CN model exhibited limitations in predicting stress distribution due to less pronounced stress discontinuities and localized stress concentrations at the joints, which were more distinctly captured by the SM model. Furthermore, the SM model more accurately simulated deformation patterns, including rocking displacements at horizontal joints and shear slipping at vertical joints. In contrast, the CIP and CIP-H models overestimated structural rigidity due to their simplified joint assumptions. The SM model, with its capability to capture complex joint interactions and deformation behavior, proves to be a reliable tool for predicting the structural response of precast concrete wall systems.