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Steel and Composite Structures Volume 39, Number 2, April25 2021 , pages 135-148 DOI: https://doi.org/10.12989/scs.2021.39.2.135 |
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Further study on improvement on strain concentration in through-diaphragm connection |
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Ying Qin, Jingchen Zhang, Peng Shi, Yifu Chen, Yaohan Xu and Zuozheng Shi
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| Abstract | ||
| Hollow structural section (HSS) columns have been increasingly popular due to their structural and architectural merits. However, practical difficulty lies in developing proper connections. The through-diaphragm connections are considered as suitable connection type that is widely adopted in Asian countries. However, the stress concentration occurs at the location connecting through-diaphragm and steel beam. Furthermore, the actual load path from the beam flange is not uniformly transferred to the HSS column as conventionally assumed. In this paper, tensile tests were further conducted on three additional specimens with beam flange plate to evaluate the load versus displacement response. The load-displacement curves, yield and ultimate capacity, ductility ratio were obtained. Furthermore, the strain development at different loading levels was discussed comprehensively. It is shown that the studied connection configuration significantly reduces the stress concentration. Meanwhile, simplified trilinear load-displacement analytical model for specimen under tensile load was presented. Good agreement was found between the theoretical and experimental results. | ||
| Key Words | ||
| structural behavior; HSS column; connection; tensile loading; analytical model | ||
| Address | ||
| Ying Qin: Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, Nanjing, China; State Key Laboratory of Green Building in Western China, Xi'an University of Architecture & Technology, Xi'an, China Jingchen Zhang, Peng Shi, Yifu Chen, Yaohan Xu and Zuozheng Shi: Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, Nanjing, China | ||