Abstract
The bolted connections with slotted-in steel plates are basic beam-to-column connections of modern post-and-beam timber building structures. However, due to significantly pinched rotational behaviors, the moment resistance of such connections are usually ignored in design. In this study, the connection-level moment resistance is enabled for modern glulam frame structures with an innovative connection design. A pair of long steel rods with screwheads is designed to generate a force couple at the sides of the connection. The proposed connection could be considered as the key lateral force resisting component, indicating a significant reduction of lateral braces and shear walls. Specimens of the target connection were carefully designed and tested in the lab to obtain their mechanical properties and failure modes. Finite element models were established and calibrated according to the tested data. The moment-rotation curves of the new connection could be easily estimated through a fitted formula. Moreover, the suggestions to improve the proposed connection is also discussed based on the observed damage modes. Results show that the new connection could be treated as rigid moment-resisting connections while the ductility could be further improved.
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Acknowledgments
This research was funded by: National Engineering Technology Research Center for Prefabrication Construction in Civil Engineering/Shen Zuyan Funding, under the grant 2020CPCCE-K01. The financial support is greatly appreciated. The authors greatly appreciatethe advises from Prof. He, Minjuan (Tongji University) for her kind suggestions that improved the work.
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Shu, Z., Ning, B., Dong, H. et al. Glulam Beam-to-Column Connection with Coupled Steel Rods with Screwheads: Concept and Experimental Verifications. KSCE J Civ Eng 27, 2570–2585 (2023). https://doi.org/10.1007/s12205-023-1852-8
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DOI: https://doi.org/10.1007/s12205-023-1852-8