Implications of inter-storey-isolation (ISI) on seismic fragility, loss and resilience of buildings subjected to near fault ground motions

Saha, Arijit; Mishra, Sudib Kumar

doi:10.1007/s10518-021-01277-9

Cited by 13 publications

(6 citation statements)

References 59 publications

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“…A relatively new seismic vibration control solution for higher buildings is inter-storey isolation (ISI). The isolation bearings are positioned at an intermediate level to isolate the upper storey block (USB), which also functions as a non-traditional tuned mass damper (TMD) to the lower storey block (LSB), reducing vibration [57]. The fundamental benefit of inter-story seismic isolation is the blockage of energy flow between the upper and lower stories, making it an effective way to divide the various components of high-rise buildings with distinct uses and, consequently, variable seismic performance needs [58].…”

Section: Rooftop Structuresmentioning

confidence: 99%

Earthquake Consideration in Architectural Design: Guidelines for Architects

Shareef

2023

Sustainability

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Architectural planners must give due consideration to seismic events as they present substantial hazards to both critical infrastructure and human well-being. This research investigates the fundamental concepts and methodologies employed by architects to enhance seismic resilience in buildings and ensure the safety of occupants. It emphasizes the importance of seismic hazard assessment, design standards, structural systems, and cutting-edge technology in reducing earthquake-related dangers. A mixed method has been adopted: surveying the literature, applying inductive reasoning, and conducting a case study. This research highlights the value of interdisciplinary cooperation between structural engineers, geotechnical experts, and architects to design resilient built environments that can survive the pressures unleashed by seismic occurrences. The findings demonstrated that architectural design solutions and approaches might significantly impact earthquake risk reduction techniques in seismic and non-seismic locations. In the cases taken, different techniques—in some cases multiple techniques—had been applied based on the buildings’ geographical locations, sizes, and shapes. Finally, we prepared a checklist for these strategies, including mass distribution, openings, rooftop structures, and other considerations to be applied by architects to make the solutions easier.

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Section: Rooftop Structuresmentioning

confidence: 99%

Earthquake Consideration in Architectural Design: Guidelines for Architects

Shareef

2023

Sustainability

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“…Ferj and Lopez-Garcia [33] compared the fragility curves of a hospital building with and without base isolators. Recently, Saha and Mishra [34] studied the effects of inter-story isolation systems on the seismic fragility of buildings. In most of the aforementioned studies, the focus was on deriving the fragility curve for a specific type of base isolation system.…”

Section: Introductionmentioning

confidence: 99%

Comparative probability-based seismic safety assessment of base-isolated buildings: A case study

Narjabadifam,

Mollaei,

Noroozinejad

et al. 2024

ACAE

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Seismic fragility curves are used to assess the structural vulnerability probability at various damage states. In this study, the effects of different isolation systems on the seismic safety of a two-dimensional reinforced concrete moment-resisting frame are investigated. The reference structure was a hotel building in California, USA. A comparative probability-based seismic safety assessment for building components was conducted on the superstructure hypothetically fitted with various isolation systems. In this regard, two categories of isolation systems, including rubber‐ and friction‐based systems, were selected. The high damping rubber bearings and friction pendulum systems were considered. Incremental dynamic analyses were conducted for a suite of earthquake records to develop the fragility curves considering modelling, demand, and capacity uncertainties. Based on the results, it was observed that the building failure probability reduction was influenced by the seismic isolation systems rather than the fixed base (un-retrofitted) model. Furthermore, the high damping rubber bearings system was found to be more reliable than the friction pendulum system in the limit states considered. However, no significant discrepancy was observed in the performance of the building fitted with isolation systems at higher damage states.

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“…Liu et al (2018) discovered that viscous fluid dampers can effectively enhance the seismic performance of mid-story isolated structures. Moreover, the application of mid-story isolated structure in the reinforcement of existing structures can effectively lower the seismic response of structures (Li et al, 2014;Ma et al, 2020;Saha and Mishra, 2021;Hur and Park, 2022). Use machine learning methods to predict the occurrence of disasters in different environments.…”

Section: Introductionmentioning

confidence: 99%

Study on the shock-absorbing effect of a new staggered story isolated structure under the long-period earthquake motion

Shu

Wang

et al. 2023

Front. Earth Sci.

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The finite element model of a new staggered story isolated structure is established. Using the time-history analysis method, the dynamic response state of the structure at each time step is calculated by integrating the acceleration time-history data step-by-step. Three different types of seismic waves (ordinary seismic wave, near-fault impulse seismic wave, far-field quasi harmonic and long-period seismic wave) are input respectively for dynamic time history analysis. The result indicates that the new staggered story isolated structure has a good shock absorption effect under the action of three different types of seismic waves. There are certain differences in the shock absorption effect under the three kinds of ground motions. The seismic response under ordinary ground motions is minimal, but the seismic response of the structure increases in response to far-field quasi harmonic and long-period ground motions and the near-field fault pulse ground motions. Meanwhile, the inter-story shear force, inter story acceleration, inter-story displacement, damage, and the energy input are all increasing, However, compared with the aseismic structure, the inter-story shear force is reduced by 48%, the inter-story acceleration is reduced by 23%, the inter-story displacement is reduced by 48%, and the energy dissipation rate of the isolated layer is 65%. In addition, the isolated bearing is in good condition during occasional earthquakes under normal ground motion. However, the bearing exceeds the permissible range during near-fault impulse ground motion and far-field harmonic and long-period earthquakes. Therefore, special consideration should be given to the area where the far-field harmonic and long-period ground motion are involved.

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Implications of inter-storey-isolation (ISI) on seismic fragility, loss and resilience of buildings subjected to near fault ground motions

Cited by 13 publications

References 59 publications

Earthquake Consideration in Architectural Design: Guidelines for Architects

Earthquake Consideration in Architectural Design: Guidelines for Architects

Comparative probability-based seismic safety assessment of base-isolated buildings: A case study

Study on the shock-absorbing effect of a new staggered story isolated structure under the long-period earthquake motion

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