Mechanical Properties of Connection Joining Novel Prefabricated Composite Shear Wall to Beam

Abstract

This paper proposes a novel connection joining prefabricated built-in double-skin steel plate composite wall to steel beam (CPDSW-IN), and investigates its mechanical behaviors through both experimental and numerical methods. Two CPDSW-IN specimens were subjected to static load testing, with the design variable being the inner cavity filled with core concrete or not. The experimental results demonstrate that the novel joints exhibit similar failure patterns, characterized by yielding of both channel steel and stiffening plates, along with concrete failure. The ductility of all CPDSW-IN specimens ranges between 3 and 4, demonstrating commendable deformation capacity. The specimen without core concrete has lower ultimate bearing capacity and better ductility. Finite element models of the CPDSW-IN specimens are developed and validated against the experimental results. Furthermore, based on this model, the effects of key parameters on the mechanical properties of CPDSW-IN specimens are discussed. In addition, based on 56 finite element models, the BP artificial neural network method, utilizing K-fold cross-validation, is employed to predict the ultimate bearing capacity. The predicted results align well with the finite element calculation outcomes, providing valuable reference for the application of the novel connection joining prefabricated built-in double-skin steel plate composite wall to steel beam in practical engineering.

Keywords: Prefabricated steel plate composite wall, Beam to wall connection, Mechanical behavior, finite element analysis