Experimental investigation of a new self-centering shear wall with resilient hinge devices. (1st September 2022)

• Record Type: Journal Article
• Authors: Zhang, Yan; Xu, Long-He
• Is Part Of: Engineering structures. Volume 266(2022)
• Publication Date: 2022-09-01
• Subjects: Self-centering shear wall -- Disc spring -- Cyclic loading test -- Hysteretic behavior -- Residual displacement; 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.2022.114657
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: A resilient hinge device (RHD) is developed to install at wall corners. Cyclic loading tests were performed on the self-centering wall with RHD (SCSW-RHD). SCSW-RHD exhibits flag-shaped hysteretic behavior with less residual drift. More energy can be dissipated by SCSW-RHD than conventional wall. SCSW-RHD provides a sufficient bearing capacity even rebars have broken. Abstract: In order to reduce the residual displacement of building structures caused by the damage on the reinforced concrete shear wall, this study develops a novel self-centering shear wall with resilient hinge devices. One device and three wall specimens are designed, and their hysteretic performance is investigated under low cyclic loading tests. The resilient hinge device which uses disc springs as the spring system is essentially a self-centering axial loaded device with an asymmetric flag-shaped hysteretic response. The experimental results demonstrate that the novel wall exhibits symmetrical flag-shaped hysteretic behavior and has a high self-centering performance. Its residual inter-story drift ratio is only 0.58% at a loading inter-story drift ratio reaching 3%. Compared with the conventional wall, the proposed self-centering shear wall has less wallboard damage, 10% degradation in peak bearing capacity, at least 50% improvement in deformation capacity, 26% degradation in equivalent viscous damping ratio, and 70% increase in total energy dissipation.