Rate-Independent Linear Damping for the Improved Seismic Performance of Inter-Story Isolated Structures. Issue 2 (25th January 2022)

• Record Type: Journal Article
• Authors: Keivan, Ashkan; Zhang, Ruiyang; Keivan, Darioush; Phillips, Brian M.; Ikenaga, Masahiro; Ikago, Kohju
• Is Part Of: Journal of earthquake engineering. Volume 26:Issue 2(2022)
• Page Start: 793
• Page End: 816
• Publication Date: 2022-01-25
• Subjects: Rate-independent linear damping -- inter-story isolation -- semi-active control -- real-time hybrid simulation -- shake table testing; Earthquake engineering -- Periodicals; 624.1762
• DOI: 10.1080/13632469.2019.1693444
• Languages: English
• ISSNs: 1363-2469

Abstract

ABSTRACT: In this study, rate-independent linear damping (RILD) is proposed for the seismic protection of inter-story isolated structures. For practical applications, the RILD force is approximated using a causal algorithm and then tracked using semi-active control. Both numerical simulation and shake table real-time hybrid simulation (RTHS) are used to study a 14-story inter-story isolated structure. First, the causal approximation of RILD evaluated in RTHS is compared to numerical simulation. Second, the benefits of RILD for inter-story isolated structures are demonstrated as compared to conventional damping. RILD offers an attractive control alternative by restricting isolation layer displacements without amplifying accelerations.