Numerical investigation on stability of reticulated shell structures composed of built-up plate members

Abstract

A novel type of reticulated shell structure composed of built-up plate members has been proposed based on its benefits in efficiency and precision of fabrication, as well as convenience of storage and transportation. This study aims to investigate the stability behavior of such structures by conducting numerical simulation analysis. The configuration of the structure is illustrated at first. Then, a validated numerical model is presented for parametric studies on two typical structural forms. Next, geometric nonlinear analysis is conducted, demonstrating the symmetrical characteristic of failure modes, and the results are utilized to develop practical prediction formulas for the elastic buckling load. Finally, material and geometric nonlinear analysis is performed to examine the impact of parameters on structural stability performance. The sensibilities of the material nonlinearity, geometric dimension, geometric imperfection, and joint stiffness on the structural stability are illustrated. This study provides insights into the instability mechanism of such structures and offers valuable guidance for their design and application.