Abstract
This paper presents an experimental and numerical investigation into the compression behaviour of T-joints between S690 cold-formed circular hollow sections (CFCHS). A total of four T-joints between S690 CFCHS were tested under axial compression in brace members. A typical failure mode was observed that all joints failed in an interaction between the local plastification of the chords and overall plastic bending of the chords. Three dimensional finite element models with geometrical and material non-linearity have been established and verified after calibration against test results. Both measured geometrical dimensions and material properties of these CFCHS are incorporated into the proposed models. Both the experimental and the numerical results are compared with design resistances obtained from existing design codes, including EN 1993-1-8 and CIDECT Design Guide 1. The investigation will facilitate development of efficient design rules for resistances of T-joints between S690 CFCHS under brace axial compression.
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Acknowledgements
The project leading to publication of this paper is partially funded by the Research Grants Committee of the Hong Kong Polytechnic University (Project No. RTZX) and the Research Grants Council of the University Grants Committee of the Government of Hong Kong SAR (Project Nos. PolyU 152194/15E, PolyU 152687/16E and PolyU 152331/17E). The authors also wish to acknowledge the Chinese National Engineering Research Centre for Steel Construction (Hong Kong Branch) at the Hong Kong Polytechnic University for financial support.
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Hu, Y.F., Chung, K.F. (2021). Investigations into Compression Behaviour of T-Joints Between S690 Circular Hollow Sections Under Brace Axial Force. In: Wang, C.M., Dao, V., Kitipornchai, S. (eds) EASEC16. Lecture Notes in Civil Engineering, vol 101. Springer, Singapore. https://doi.org/10.1007/978-981-15-8079-6_143
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DOI: https://doi.org/10.1007/978-981-15-8079-6_143
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