NUMERICAL STUDY ON STRUCTURAL BEHAVIOUR OF STAINLESS STEEL BEAM-TO-COLUMN JOINTS WITH DOUBLE EXTENDED END-PLATE CONNECTIONS
Jun-Dong Gao *, Huan-Xin Yuan and Xin-Xi Du
School of Civil Engineering, Wuhan University, Wuhan, PR China
The component method has been widely used in prediction of structural behaviour of beam-to-column joints. In this paper, the moment-rotation (M-φ) behaviour of stainless steel double extended end-plate connections was investigated. By means of the general finite element (FE) software package ABAQUS, elaborated FE models were developed. The simulated results of the flush end-plate connection and single extended end-plate connection agreed well with the experimental results available from the relevant literature. Based on the validated FE models, the effects of key parameters were separately analysed. The obtained characteristics of the M-φ curve were used to evaluate the component method provided in EN 1993-1-8 and the modified design formula and the Chinese code GB 51022. It could be concluded that the initial rotational stiffness of stainless steel beam-to-column joints obtained from design provisions in EN 1993-1-8 was overpredicted, yet the moment resistance was underestimated. In addition, the predictions of Chinese code GB 51022 were conservative, highlighting the requirements for further research on M-φ relation for stainless steel end-plate connections.
Stainless steel; Beam-to-column joint; End-plate connection; Component method; M-φ relation