PSI - Issue 64

Nouraldaim F.A. Yagoub et al. / Procedia Structural Integrity 64 (2024) 105–113

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Author name / Structural Integrity Procedia 00 (2019) 000 – 000

© 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Reinforced concrete rocking wall; Self-centering walls; Flexural Plate Energy Dissipator (FPED); Seismic forces; Resilient performance; Finite element analysis (FEA). 1. Introduction Shear walls constitute a crucial component of earthquake-resistant building design, aimed at minimizing lateral displacements under seismic loads. Ensuring the structural safety and effective performance of buildings during earthquake ground motions is paramount due to the destructive nature of earthquakes, which pose significant risks to human safety and socioeconomic stability. Traditional structural design methods often rely on ductile strategies to dissipate seismic energy by permitting plastic deformation in structural members. However, the excessive plastic deformation occurring at failure locations often leads to significant damage to structural components and poses challenges for rehabilitation (Xu et al., 2023). Consequently, there is a pressing need to develop innovative earthquake-resilient structures that depart from conventional design paradigms. Recent focus has shifted towards resilience-based structural design approaches, which aim to maintain structural functionality and facilitate rapid post-earthquake recovery. Many structures were seriously damaged and could not be in service anymore, resulting in huge economic losses (Option 1 in Figure 1). The resilience-based designed structure can maintain continued operation with minor repairable damage (Xiang et al., 2022; Xu et al., 2023; Yagoub et al., 2024). To improve the seismic resilience of the structure, our first thought is to increase the strength and stiffness so that it will not be damaged under the earthquake (Option 2 in Figure 1). Some researchers have proposed to use replaceable components in the plastic zones (Option 3 in Figure 1) so that the structure can be quickly repaired after the earthquake (Lu et al., 2018). some researchers have explored solutions to reduce the structural functionality loss directly to improve seismic resilience (Option 4 in Figure 1) (Eatherton et al., 2010). Various strategies have been explored to enhance the seismic resilience of structures. While conventional approaches prioritize increasing strength and stiffness to withstand earthquakes, such measures often incur higher material demands, elevated costs, and increased carbon emissions. Alternatively, researchers have proposed incorporating replaceable components within plastic zones to enable swift post-earthquake repairs. Additionally, efforts have been directed toward minimizing structural functionality loss directly to improve seismic resilience. To enhance the energy absorption capacity of structural elements, hybrid walls incorporating energy dissipation damping devices have been introduced (Christopoulos et al., 2002). These devices range from axial-acting hysteretic energy-dissipating elements to metal energy-dissipation devices (Christopoulos et al., 2002; Ma et al., 2010; Palermo et al., 2007; Shen and Kurama, 2002), which aims to enhance the seismic performance of structures by dissipating seismic energy efficiently. In (Babiker et al., 2022; Dean and Rolfes, 2018; Yagoub and Wang, 2022) conducted nonlinear analysis studies utilizing ABAQUS, a commercial finite-element software. Numerous studies have investigated the efficacy of various design parameters and placement strategies for energy-dissipating devices in hybrid (Henry, 2011; Marriott et al., 2008; Restrepo et al., 2007; Twigden and Henry, 2019; Yagoub et al., 2023; Yagoub and Wang, 2024). However, minimal research exists on non-emulative precast concrete (PC) walls with energy dissipators (ED) corners (Clayton et al., 2012; Cui et al., 2019; Marriott et al., 2008). In response, this study presents a novel design of a Self-centering Hybrid Rocking Wall (SHRW) with corner replaceable Flexural Plate Energy Dissipators (FPED), aimed at achieving non-emulative performance and rapid post-earthquake recovery. As depicted in Figure 3 a, b, and c, the self-centering hybrid precast wall with replaceable flexural plate. In addition, the steel wall toe Figure 3b, which consisted of an H-shaped steel column embedded at the base of the wall, space for the attachment of the flexural plate steel energy dissipators Figure 2a. The proposed hybrid rocking wall, equipped with replaceable flexural plate steel energy dissipators, offers advantages such as increased energy dissipation, enhanced self-centering capability, and moderate lateral stiffness compared to conventional counterparts, thereby meeting the functional requirements of rocking structures. To investigate the mechanism and self-centering performance of the proposed system, a series of cyclic loading tests were conducted under various scenarios, considering parameters such as the initial prestressing force, location of © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers