A precast beam-column joint using an innovative friction damper as a connector: Experimental and numerical study

Ai, Qi; Liu, Xuhong; Xu, Rongjian; Yan, Xueyuan

doi:10.1016/j.istruc.2021.11.045

Cited by 9 publications

(2 citation statements)

References 28 publications

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“…Unlike the NAO specimens, the brass specimens exhibited a “sharp corner” phenomenon 29 in their hysteresis curves, corresponding to F t1 , F t2 , F t3 , and F t4 in the first to fourth quadrants of Figure 15. This phenomenon also appeared in the hysteresis curves of other brass friction devices 30,33,34 . Gandelli et al 35 .…”

Section: Discussionmentioning

confidence: 64%

“…This phenomenon also appeared in the hysteresis curves of other brass friction devices. 30,33,34 Gandelli et al 35 indicated that the acceleration impulses during motion reversals and the momentary sticking of friction interfaces jointly lead to the "sharp corner" phenomenon. In order to quantitatively analyze the influence of the F t on the resistance of brass specimens, Figure 17 shows the growth rate of max (F t1 , F t2 ) compared to F 0+ .…”

Section: Evaluation Of Mechanical Behaviormentioning

confidence: 99%

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Development and optimization of a novel response‐amplified friction damper with different friction pairs

Gao,

Song,

Wang

et al. 2023

Earthq Engng Struct Dyn

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In order to improve the efficiency of friction dampers, a shear‐type response‐amplified friction damper (RAFD) was proposed, which utilized a lever mechanism to amplify the shear displacement and increase the sliding distance of friction pairs. Cyclic loading tests were conducted on 12 RAFD specimens to evaluate the effects of machining processes, friction materials, loading protocols, and bolt pretension on the mechanical performance of the specimens. The results showed that the RAFD specimens with NAO and brass friction pads exhibited plump hysteresis loops, and the bearing capacity, effective stiffness, energy dissipation, and equivalent viscous damping ratio all met the stability requirements of FEMA 356 for the friction damper. Reducing the clearance between pins and holes and strengthening the hole edges shortened the plateau near zero resistances of the hysteresis loops by 75%–90%. Furthermore, combined with rotational analysis of the lever, a design methodology for the RAFD specimen was developed. Based on the response amplification factor R, key mechanical indices such as bearing capacity and equivalent friction coefficient were derived, and a theoretical hysteresis model for the RAFD was constructed, which matched well with experimental results.

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Section: Discussionmentioning

confidence: 64%