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Steel and Composite Structures Volume 51, Number 5, June 10 2024 , pages 487-498 DOI: https://doi.org/10.12989/scs.2024.51.5.487 |
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Application of a ductile connection system to steel MRF strengthened with hinged walls |
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Zhi Zhang, Yulong Feng, Dichuan Zhang and Zuanfeng Pan
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| Abstract | ||
| Steel moment resisting frames (MRFs) typically have inter-story drift concentrations at lower stories during earthquakes as found from previous research. Hinged walls (HWs) can be used as structural strengthening components to force the MRFs deform uniformly along the building height. However, large moment demands are often observed on HWs and make the design of HWs non-economical. This paper proposes a method to reduce the moment demand on HWs using a ductile connection system between the MRFs and the HWs. The ductile connection system is designed with a yield strength and energy dissipation capacity, for the purpose of limiting the seismic forces transferred to the HWs and dissipating seismic energy. Nonlinear time history analyses were performed using 10 far-filed earthquakes at maximum considered earthquake level. The analysis results show that the proposed ductile connection system can reduce: (1) seismic moment demands in the HWs; (2) floor accelerations; (3) the connection force between HWs and MRFs. | ||
| Key Words | ||
| ductile connection system; hinged wall; steel moment resisting frame; seismic performance | ||
| Address | ||
| Zhi Zhang:Thornton Tomasetti Inc., 120 Broadway, New York City, U.S.A. Yulong Feng:School of Civil Engineering, Hefei University of Technology, Hefei, China Dichuan Zhang:School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan City, Kazakhstan Zuanfeng Pan:Department of Civil and Environment Engineering, School of Engineering and Digital Sciences, Nazarene University, Astana, Kazakhstan | ||