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A platform for research: civil engineering, architecture and urbanism
Fragility curves for assessment of seismic vulnerability of buildings on slopes
https://orcid.org/0009-0002-7878-9382
Abstract Step-back and step-back setback configurations are the common structural systems found in the hilly regions of the Indian Subcontinent. These buildings are often subjected to torsional effects under the action of earthquakes due to different foundation levels. The present study focuses on the probabilistic determination of the seismic vulnerability of step-back and step-back setback configurations and the effects of live load eccentricity. Incremental Dynamic Analysis (IDA) is used to obtain the dynamic capacity curves, which capture the torsional effects. A set of 11 ground motion time histories have been selected and scaled to the target response spectrum. Fragility analysis is carried out after obtaining the dynamic capacity curves, and the fragility curves are obtained for five limit states, namely Operational Performance (OP), Immediate Occupancy (IO), Damage control (DC), Life Safety (LS), and Collapse Prevention (CP) as per FEMA 273. Comparison of the fragility curves indicates the suitability of the step-back setback configuration vis a vis step-back configuration, as it yields a low probability of damage. The short column effects, along with live load eccentricity, increase the vulnerability to damage.
Highlights The study focuses on the seismic vulnerability of hill sloped buildings with step back and step back setback configurations commonly found in the hilly regions of the India. These buildings are often subjected to torsional effects under the action of earthquakes due to different foundation levels. Incremental Dynamic Analysis (IDA) is used to obtain dynamic capacity curves that capture torsional effects. A set of 11 ground motion time histories is selected and scaled to the target response spectrum. The fragility curves obtained indicate that the step back setback configuration yields a lower probability of damage compared to the step back configuration. Short column effects and live load eccentricity are found to increase the vulnerability to damage.
Fragility curves for assessment of seismic vulnerability of buildings on slopes
https://orcid.org/0009-0002-7878-9382
Abstract Step-back and step-back setback configurations are the common structural systems found in the hilly regions of the Indian Subcontinent. These buildings are often subjected to torsional effects under the action of earthquakes due to different foundation levels. The present study focuses on the probabilistic determination of the seismic vulnerability of step-back and step-back setback configurations and the effects of live load eccentricity. Incremental Dynamic Analysis (IDA) is used to obtain the dynamic capacity curves, which capture the torsional effects. A set of 11 ground motion time histories have been selected and scaled to the target response spectrum. Fragility analysis is carried out after obtaining the dynamic capacity curves, and the fragility curves are obtained for five limit states, namely Operational Performance (OP), Immediate Occupancy (IO), Damage control (DC), Life Safety (LS), and Collapse Prevention (CP) as per FEMA 273. Comparison of the fragility curves indicates the suitability of the step-back setback configuration vis a vis step-back configuration, as it yields a low probability of damage. The short column effects, along with live load eccentricity, increase the vulnerability to damage.
Highlights The study focuses on the seismic vulnerability of hill sloped buildings with step back and step back setback configurations commonly found in the hilly regions of the India. These buildings are often subjected to torsional effects under the action of earthquakes due to different foundation levels. Incremental Dynamic Analysis (IDA) is used to obtain dynamic capacity curves that capture torsional effects. A set of 11 ground motion time histories is selected and scaled to the target response spectrum. The fragility curves obtained indicate that the step back setback configuration yields a lower probability of damage compared to the step back configuration. Short column effects and live load eccentricity are found to increase the vulnerability to damage.
Fragility curves for assessment of seismic vulnerability of buildings on slopes
https://orcid.org/0009-0002-7878-9382
Abstract Step-back and step-back setback configurations are the common structural systems found in the hilly regions of the Indian Subcontinent. These buildings are often subjected to torsional effects under the action of earthquakes due to different foundation levels. The present study focuses on the probabilistic determination of the seismic vulnerability of step-back and step-back setback configurations and the effects of live load eccentricity. Incremental Dynamic Analysis (IDA) is used to obtain the dynamic capacity curves, which capture the torsional effects. A set of 11 ground motion time histories have been selected and scaled to the target response spectrum. Fragility analysis is carried out after obtaining the dynamic capacity curves, and the fragility curves are obtained for five limit states, namely Operational Performance (OP), Immediate Occupancy (IO), Damage control (DC), Life Safety (LS), and Collapse Prevention (CP) as per FEMA 273. Comparison of the fragility curves indicates the suitability of the step-back setback configuration vis a vis step-back configuration, as it yields a low probability of damage. The short column effects, along with live load eccentricity, increase the vulnerability to damage.
Highlights The study focuses on the seismic vulnerability of hill sloped buildings with step back and step back setback configurations commonly found in the hilly regions of the India. These buildings are often subjected to torsional effects under the action of earthquakes due to different foundation levels. Incremental Dynamic Analysis (IDA) is used to obtain dynamic capacity curves that capture torsional effects. A set of 11 ground motion time histories is selected and scaled to the target response spectrum. The fragility curves obtained indicate that the step back setback configuration yields a lower probability of damage compared to the step back configuration. Short column effects and live load eccentricity are found to increase the vulnerability to damage.
Fragility curves for assessment of seismic vulnerability of buildings on slopes
Magapu, Subhash (author) / Setia, Saraswati (author)
2023-06-06
Article (Journal)
Electronic Resource
English
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