Vol. 18, No. 3, pp. 715-727 (2022)
EXPERIMENTAL STUDY OF HYSTERETIC BEHAVIOR OF
RESILIENT PREFABRICATED STEEL FRAMES WITH AND
WITHOUT INTERMEDIATE COLUMNS
Meng-Yao Cheng 1, Yan-Xia Zhang 1, 2, *, Zhen-Xing Li 1 and Wen Wen 1
1 School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China
2 Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and Ministry Co-construction
Collaboration Innovation Center, Beijing University of Civil Engineering and Architecture, Beijing, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 14 August 2020; Revised: 10 July 2021; Accepted: 8 June 2022
DOI:10.18057/IJASC.2022.18.3.9
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ABSTRACT
The research innovatively proposed a seismic resilient structural system including a prefabricated self-centering steel frame (PSC) and an intermediate column with a friction damper (CD). The CD, installed in the mid-span beam of the PSC, was expected to provide additional stiffness and damping, The seismic performance of the newly-developed resilient structural system thus can be greatly improved. This paper stated the experimental study on the hysteretic behaviors of the newly-developed system. Comparative pseudo-dynamic tests were conducted for the validation where two systems, a PSC with CD and a PSC without CD, were tested respectively. The testing results indicated that a PSC with CD has better seismic performance for long-span structures under catastrophic earthquakes’ attack. The CD overall provided additional stiffness for requirements of earthquake fortification criteria. The friction damper, part of CD greatly improves the damping effect together with the energy-dissipation bolts. The small residual rotations of beam-column connections on the PSC subsystem provides a satisfactory self-centering mechanism. Moreover, the steel strands of the resilient structural system can maintain the elasticity even after the highest-intensity earthquake. In turn, the satisfactory seismic performance of the proposed PSC with CD structural system validated. This research developed a series of design formula for the T-plate and L-plate friction damper in the CD to guarantee the designed seismic performance of the proposed seismic resilient structural system. The theoretical hysteresis curve of the system was proposed for the future design specification.
KEYWORDS
Seismic performance, Pseudo-dynamic test, Resilient prefabricated steel frame, Friction damper, Comparative analysis
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