Influence of Pulse-Like Near-Fault Ground Motions on the Base-Isolated Buildings with LRB Devices

Özuygur, Ali Ruzi; Farsangi, Ehsan Noroozinejad

doi:10.1061/(asce)sc.1943-5576.0000603

Cited by 15 publications

(9 citation statements)

References 17 publications

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“…Existing analysis and design of building isolation systems are often based on the linear or bi-linear characteristics of isolators, which often have limited performance in isolating near-fault earthquakes compared with far-fault long-period earthquakes (Providakis, 2009;Gur et al, 2014;Ozuygur and Noroozinejad Farsangi, 2021;Akehashi and Takewaki, 2022b). Near-fault earthquakes often contain extensive pulses and high-frequency vibrations can be amplified to the super-structures by linear base isolation systems as illustrated in Figure 5 (Ho et al, 2018).…”

Section: Super-structure Isolation Systemsmentioning

confidence: 99%

Analysis and design of non-linear seismic isolation systems for building structures—An overview

Zhu

Lang²,

Fujita³

et al. 2023

Front. Built Environ.

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In this paper, the development of non-linear building isolation systems is overviewed. The study summarizes commonly used linear building isolation systems in two categories, which are building base isolation systems and building inter-storey isolation systems. Typical isolators including Lead-Rubber Bearings Friction Pendulum Bearings inter-storey viscous damper and Tuned Mass Damper are reviewed. The analysis and design of linear building isolation systems are also reported. After that, non-linear building isolation systems are introduced from two aspects based on their dynamic characteristics. They are (i) non-linear stiffness isolators including Quasi-Zero Stiffness isolators and Non-linear Energy Sink and (ii) non-linear damping isolators including power-law viscous dampers and magnetorheological dampers. Practical implementations of these non-linear isolators are introduced. Finally, the analysis and design of non-linear building isolation systems are discussed. Traditional equivalent linearization approaches and advanced non-linear frequency design approaches are introduced. The promising applications of the non-linear frequency design approaches to building isolation systems are also demonstrated in this review paper.

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Section: Super-structure Isolation Systemsmentioning

confidence: 99%

Analysis and design of non-linear seismic isolation systems for building structures—An overview

Zhu

Lang²,

Fujita³

et al. 2023

Front. Built Environ.

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“…Friction isolation devices, yielding steel energy-absorbing devices [ 19 , 20 , 21 ] and visco-elastic [ 22 , 23 ] and fluid-viscous damping devices [ 24 ], are also used for base isolation. Mostly, the base isolation technique is used for low- to medium-rise buildings for seismic response mitigation [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. However, recently, the application of isolation is proposed for high-rise buildings [ 35 , 36 , 37 , 38 , 39 , 40 , 41 ].…”

Section: Passive Control Of High-rise Buildingsmentioning

confidence: 99%

Review of Vibration Control Strategies of High-Rise Buildings

Ouni

Abdeddaim

Elias

et al. 2022

Sensors

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Since the early ages of human existence on Earth, humans have fought against natural hazards for survival. Over time, the most dangerous hazards humanity has faced are earthquakes and strong winds. Since then and till nowadays, the challenges are ongoing to construct higher buildings that can withstand the forces of nature. This paper is a detailed review of various vibration control strategies used to enhance the dynamical response of high-rise buildings. Hence, different control strategies studied and used in civil engineering are presented with illustrations of real applications if existing. The main aim of this review paper is to provide a reference-rich document for all the contributors to the vibration control of structures. This paper will clarify the applicability of specific control strategies for high-rise buildings. It is worth noting that not all the studied and investigated methods are applicable to high-rise buildings; a few of them remain limited by many parameters such as cost-effectiveness and engineering-wise installation and maintenance.

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“…The effects of near-fault and far-fault earthquakes have also been considered in some other studies [27][28][29]. In several studies, the effects of asymmetry in structure [30], the presence of soft stories [31], and eccentricity [32] on isolated structures have been studied. An isolated building with LRB isolators was analyzed using a series of real near-fault earthquake ground accelerations [33].…”

Section: Introductionmentioning

confidence: 99%

Application of a Novel Optimization Algorithm in Design of Lead Rubber Bearing Isolation Systems for Seismic Rehabilitation of Building Structures

Mehri

Mollaei

Farsangi

et al. 2023

IJE

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Various mechanical and geometrical parameters have different effects on the isolation system's performance. Thus, a sensitivity study of the isolated structures' behavior is an essential matter. In this regard, the isolation systems should be designed using optimization approaches to consider the effects of the different factors. In this study, the optimal design of the lead rubber bearing (LRB) seismic isolation was conducted by considering mass irregularity and near-fault seismic excitation effects. Also, sensitivity analysis of the behavior of the considered isolated buildings was implemented concerning the mechanical parameters of the LRB system. A nonlinear time history dynamic analysis was used here, and the design optimization of the LRB isolator was programmed using the newly introduced grasshopper optimization algorithm (GOA). The main purpose was to investigate the ability of the GOA to optimize the design parameters of the LRB-isolated frames. The results proved the desirable ability of the GOA to solve optimal design problems for isolation systems. Also, the sensitivity analysis of the seismic behavior of LRB base-isolated structures showed that the yield base shear index had the most important effects. Also, the mass irregularity parameter showed a negligible influence.

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Influence of Pulse-Like Near-Fault Ground Motions on the Base-Isolated Buildings with LRB Devices

Cited by 15 publications

References 17 publications

Analysis and design of non-linear seismic isolation systems for building structures—An overview

Analysis and design of non-linear seismic isolation systems for building structures—An overview

Review of Vibration Control Strategies of High-Rise Buildings

Application of a Novel Optimization Algorithm in Design of Lead Rubber Bearing Isolation Systems for Seismic Rehabilitation of Building Structures

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