Experimental investigation and simulation analysis of cast-steel joints under vertical pressure

Abstract

Abstract The joint made of cast steel is frequently utilized within a treelike column structure to ensure a smooth transition. It is of great significance in ensuring the overall structural safety, but currently, the mechanical property and bearing capacity of this type of joint cannot be fully understood. This study delves into the load-bearing characteristics of such a cast-steel joint featuring three branches. Initially, a comprehensive model of the cast-steel joint, sourced from a practical engineering, underwent vertical load testing. Detailed scrutiny of stress distribution and vertical displacement of the tested joint was conducted based on the experimental outcomes. Subsequently, a finite element model of the tested joint was constructed using SolidWorks and subjected to analysis via ANSYS. The numerical findings were juxtaposed with experimental data and extrapolated to encompass other parametric scenarios. Ultimately, a regression analysis method was employed to derive a calculation formula for the load-carrying capacity of branch-bearing cast-steel joints. This formula aids in estimating geometric parameters and load-bearing capacity during the preliminary design phase. Comparative analysis reveals a substantial concurrence among experimental, finite element analysis, and formula-based predictive outcomes.