Stability and dynamic performance analysis of semi-rigid single-layer spherical reticulated shell with triodetic joints

In recent years, the country has vigorously promoted factory buildings. As the key components of single-layer spherical reticulated shells, the mechanical properties of nodes directly affect the stability and seismic performance of reticulated shells. In this work, based on a simplified model of a new prefabricated triodetic joint, the analysis of the actual entire model is carried out, and the arching angle is also substituted into the stiffness formula as a parameter for correction, and the formula of calculating the stiffness of the entire model considering the arching angle for the triodetic joint is obtained. The single-layer spherical reticulated shell model is established through the self-developed command stream program in ANSYS, and the element of combin39 is utilized to simulate the out-of-plane and in-plane stiffnesses of the triodetic joints, and the stability and dynamic performance of the reticulated shell model are analyzed, with the effects of different joint stiffnesses caused by different arching angles, common spans and rise-span ratios of reticulated shells being considered. Through the analysis on a large number of examples, the stability and dynamic performance of the K8 single-layer spherical reticulated shell with semi-rigid joints such as triodetic joints are comprehensively investigated. © 2024 Chinese Society of Civil Engineering. All rights reserved.