Effects of near-fault pulse-like ground motions on seismically isolated buildings

Güneş, Necmettin

doi:10.1016/j.jobe.2022.104508

Cited by 14 publications

(5 citation statements)

References 45 publications

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“…17, the minor increase of the coefficient of the interface in this case led to a smaller sliding displacement for the specimen with more mass in one direction (between t = 10.5 s and t = 11.5 s), which triggered a higher sliding displacement of the specimen with more mass in the other direction. This high sliding displacement of structures subjected to long-period pulses has been experimentally demonstrated by Tsiavos et al (2013Tsiavos et al ( , 2017Tsiavos et al ( , 2021bTsiavos et al ( , 2021c and analytically by Güneş (2022). The insignificant residual sliding displacement of 5 mm in this case demonstrates the efficiency of the lowcost and sustainable energy dissipation device to recenter the structure back to its original position after the end of the excitation for this increased value of the top mass.…”

Section: Influence Of Added Mass On the Responsesupporting

confidence: 70%

Shaking table investigation of a low-cost and sustainable timber-based energy dissipation system with recentering ability

Tsiavos

Kolyfetis

Panzarasa

et al. 2022

Bull Earthquake Eng

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SummaryThe aim of this paper is to demonstrate the efficiency of a low-cost and sustainable timber-based energy dissipation system with recentering ability, which can be used as a seismic isolation system or a tuned mass damper for the seismic protection of structures in developing or developed countries. The system, defined as Dovetail with SPrings (Dove-SP), utilizes the attractive properties of timber to store CO2, thus reducing the carbon footprint of the existing energy dissipation systems: It comprises two timber slabs that are designed to slide against each other in a motion that is restrained by a dovetail sliding joint. Two sliding interfaces that allow this sliding motion at an attractively low friction coefficient are experimentally investigated: A PVC sand-wich (PVC-s) sliding interface, comprising a thin layer of sand that is sand-wiched between two PVC layers and a timber sand-wich sliding interface consisting of a thin layer of sand encapsulated between two beech timber surfaces. A set of low-cost steel springs is designed and installed on both sides of the dovetail joint to recenter the structure back to its original position after the end of an earthquake ground motion excitation. A novel, low-cost and deformable wood material fabricated from delignified balsa wood is used to reduce the pounding effects before the activation of the steel springs. The seismic behavior and the recentering ability of the novel timber-based energy dissipation system subjected to an ensemble of recorded earthquake ground motion excitations was experimentally investigated through a large-scale shaking table investigation at ETH Zurich.

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Section: Influence Of Added Mass On the Responsesupporting

confidence: 70%

Shaking table investigation of a low-cost and sustainable timber-based energy dissipation system with recentering ability

Tsiavos

Kolyfetis

Panzarasa

et al. 2022

Bull Earthquake Eng

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“…1d-g), a feature which was also highlighted by Wu et al 57 . The presence of a relatively narrow velocity pulse imposes higher demand on the structures, increasing the possibility of structural collapse [58][59][60] . The presence of velocity pulses warrants further interrogation for destructive coherent pulses within acceleration records that can also be destructive to common civil structures 61 .…”

Section: Resultsmentioning

confidence: 99%

Dynamics of episodic supershear in the 2023 M7.8 Kahramanmaraş/Pazarcik earthquake, revealed by near-field records and computational modeling

Abdelmeguid,

Zhao,

Yalcinkaya

et al. 2023

Commun Earth Environ

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The 2023 M7.8 Kahramanmaraş/Pazarcik earthquake was larger and more destructive than what had been expected. Here we analyzed nearfield seismic records and developed a dynamic rupture model that reconciles different currently conflicting inversion results and reveals spatially non-uniform propagation speeds in this earthquake, with predominantly supershear speeds observed along the Narli fault and at the southwest (SW) end of the East Anatolian Fault (EAF). The model highlights the critical role of geometric complexity and heterogeneous frictional conditions in facilitating continued propagation and influencing rupture speed. We also constrained the conditions that allowed for the rupture to jump from the Narli fault to EAF and to generate the delayed backpropagating rupture towards the SW. Our findings have important implications for understanding earthquake hazards and guiding future response efforts and demonstrate the value of physics based dynamic modeling fused with near-field data in enhancing our understanding of earthquake mechanisms and improving risk assessment.

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“…Dynamics of Structures in Near-Fault Zones" by Prof. Güneş N. (2022) [1] provides a comprehensive overview of the dynamic behavior of structures subjected to near-fault seismic activities. Nguyen's work emphasizes the unique characteristics of near-fault ground motions, including their high-frequency content and velocity pulses.…”

Section: Literature Reviewmentioning

confidence: 99%

Artificial pulse framework for analyzing near-fault impacts on buildings

Kumar,

Singh

2023

Int. J. Civ. Eng. Archit. Eng.

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Effects of near-fault pulse-like ground motions on seismically isolated buildings

Cited by 14 publications

References 45 publications

Shaking table investigation of a low-cost and sustainable timber-based energy dissipation system with recentering ability

Shaking table investigation of a low-cost and sustainable timber-based energy dissipation system with recentering ability

Dynamics of episodic supershear in the 2023 M7.8 Kahramanmaraş/Pazarcik earthquake, revealed by near-field records and computational modeling

Artificial pulse framework for analyzing near-fault impacts on buildings

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