Experimental investigation and earthquake response analysis of a multilayer viscous damping wall with amplified deformation. (15th January 2022)

• Record Type: Journal Article
• Authors: He, Wenfu; Xu, Hao; Xu, Zidong; Liu, Wenguang
• Is Part Of: Engineering structures. Volume 251:Part A(2022)
• Publication Date: 2022-01-15
• Subjects: Viscous damping wall -- Leverage amplification system -- Multidamping layers -- Model test -- Structural responses; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2021.113427
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: The multilayer viscous damping wall has amplified damping force and energy dissipation capacity. The proposed mechanical model can predict the hysteretic behavior of MADW under ranging loading deformations and frequencies. The MADW reinforced structure has significantly smaller responses, larger dissipated energy and better performance state. Abstract: This study proposes a multilayer viscous damping wall with amplified deformation (MADW) and investigates its performance in reducing the structural responses. The proposed device uses a leverage amplification system to amplify the interstory displacement of the structure as well as employs multidamping layers to improve the dissipated energy capacity. The mechanical model is proposed and the amplification efficiency is discussed. Furthermore, experimental comparisons are conducted to characterize the behavior of MADWs and ordinary viscous damping walls (VDWs). The parameter analysis on the deformation amplitude and loading frequency is also performed through the model test. Both the damping force and the dissipated energy are significantly improved. Subsequently, a numerical study of a frame structure is performed and the variations on the structural responses as well as the dissipated energy are illustrated. By comparing the earthquake responses of various structures installed with different types of damping walls, the responses mitigation efficiency is confirmed. Besides, the structure installed with MADWs has more stable performance state.