Techno Press

Steel and Composite Structures   Volume 29, Number 6, December25 2018, pages 717-734
Moment-rotation relationship of hollow-section beam-to-column steel joints with extended end-plates
Jia Wang, Haiming Zhu, Brian Uy, Vipulkumar Patel, Farhad Aslani and Dongxu Li

Abstract     [Full Text]
    This paper presents the flexural performance of steel beam-to-column joints composed of hollow structural section beams and columns. A finite element (FE) model was developed incorporating geometrical and material nonlinearities to evaluate the behaviour of joints subjected to bending moments. The numerical outcomes were validated with experimental results and compared with EN1993-1-8. The demountability of the structure was discussed based on the tested specimen. A parametric analysis was carried out to investigate the effects of steel yield strength, end-plate thickness, beam thickness, column wall thickness, bolt diameter, number of bolts and location. Consequently, an analytical model was derived based on the component method to predict the moment-rotation relationships for the sub-assemblies with extended end-plates. The accuracy of the proposed model was calibrated by the experimental and numerical results. It is found that the FE model is fairly reliable to predict the initial stiffness and moment capacity of the joints, while EN1993-1-8 overestimates the initial stiffness extensively. The beam-to-column joints are shown to be demountable and reusable with a moment up to 53% of the ultimate moment capacity. The end-plate thickness and column wall thickness have a significant influence on the joint behaviour, and the layout of double bolt-rows in tension is recommended for joints with extended end-plates. The derived analytical model is capable of predicting the moment-rotation relationship of the structure.
Key Words
    hollow section; beam-to-column joint; moment-rotation relationship; demountability; component method
(1) Jia Wang, Haiming Zhu:
School of Civil and Environmental Engineering, The University of New SouthWales, Sydney, NSW 2052, Australia;
(2) Jia Wang, Brian Uy, Dongxu Li:
School of Civil Engineering, The University of Sydney, Sydney, NSW 2006, Australia;
(3) Vipulkumar Patel:
School of Civil Engineering, The University of Sydney, Sydney, NSW 2006, Australia;
(4) Farhad Aslani:
School of Civil Environmental and Mining Engineering, The University ofWestern Australia, Crawley, WA 6009, Australia;
(5) Farhad Aslani:
School of Engineering, Edith Cowan University, WA 6027, Australia.

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