Seismic hazard map of India and neighbouring regions

Sreejaya, K.P.; Raghukanth, S. T. G.; Gupta, I. D.; Murty, C. V. R.; Srinagesh, D.

doi:10.1016/j.soildyn.2022.107505

Cited by 23 publications

(4 citation statements)

References 61 publications

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“…For Zone‐IV, two such GMMs are used, 112,113 whereas, for Zone‐V, there are four such GMMs 114–117 . Further details of GMMs can be found in Sreejaya et al 118 . With

{T_{co}} = \;3.0\;{\rm{s}}

{T_{ogm}}

for 2‐, 4‐, and 7‐storied buildings in Zone‐IV are found to be 1.44, 1.56, and 1.87 s, respectively.…”

Section: Example Rc Building Types and Fragility Assessmentmentioning

confidence: 99%

“…For Zone-IV, two such GMMs are used, 112,113 whereas, for Zone-V, there are four such GMMs. [114][115][116][117] Further details of GMMs can be found in Sreejaya et al 118 With 𝑇 𝑐𝑜 = 3.0 s, 𝑇 𝑜𝑔𝑚 for 2-, 4-, and 7-storied buildings in Zone-IV are found to be 1.44, 1.56, and 1.87 s, respectively. Similarly, 𝑇 𝑜𝑔𝑚 for buildings in Zone-V are found to be 1.15, 1.57, and 1.64 s, respectively.…”

Section: Fragility Analysis Of Example Buildingsmentioning

confidence: 99%

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Risk‐targeted importance factors for prescriptive seismic design of critical buildings

Badal

Sinha

2023

Earthq Engng Struct Dyn

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The post‐earthquake recovery of a community depends on the ability of important buildings to perform their functions. Lifeline and other critical buildings that meet a predictable enhanced seismic performance increase the community's disaster risk management capacity. In prescriptive force‐based design standards, the seismic design force for these buildings is typically enhanced using an importance factor depending on the risk category. The present paper proposes an innovative framework based on performance‐based seismic design (PBSD) principles using risk‐targeted importance factors suitable for use with prescriptive standards. The framework decouples probabilistic assessments of building typologies to experts, while the structural designers can continue the conventional design approach. The framework explicitly considers probabilistic seismic demand, uncertainty in the performance of the building, and the inter‐building variation within a particular building typology in seismic performance. Six special reinforced concrete (RC) frame buildings conforming to Indian standards are selected to illustrate the framework. Sensitivity studies on parameter selection are used to establish the framework's robustness. An expression for the importance factors is also proposed. The use of the proposed importance factor expression is shown to meet a wide range of risk targets corresponding to different performance levels. The paper also proposes design factors for enhanced performance objectives suitable for the risk‐targeted prescriptive design. Further, the framework is implemented to estimate the seismic risk associated with existing building typology conforming to prevalent design standards. The assembly‐ and critical‐category RC buildings are found to require higher importance factors for achieving enhanced performance objectives than currently prescribed.

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“…For Zone‐IV, two such GMMs are used, 112,113 whereas, for Zone‐V, there are four such GMMs 114–117 . Further details of GMMs can be found in Sreejaya et al 118 . With

{T_{co}} = \;3.0\;{\rm{s}}

{T_{ogm}}

for 2‐, 4‐, and 7‐storied buildings in Zone‐IV are found to be 1.44, 1.56, and 1.87 s, respectively.…”

Section: Example Rc Building Types and Fragility Assessmentmentioning

confidence: 99%

Section: Fragility Analysis Of Example Buildingsmentioning

confidence: 99%

Risk‐targeted importance factors for prescriptive seismic design of critical buildings

Badal

Sinha

2023

Earthq Engng Struct Dyn

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“…Walling and Mohanty (Walling & Mohanty, 2009) provide a comprehensive review of these studies. Furthermore, there are few studies that quantify the seismic hazard for the entire country (Bhatia et al, 1999;Khattri et al, 1984;Parvez et al, 2003;Rao et al, 2020;Sitharam & Kolathayar, 2013;Sreejaya et al, 2022). This list includes studies with both deterministic and probabilistic approaches.…”

Section: Introductionmentioning

confidence: 99%

Disaggregation of probabilistic seismic hazard for two Indian cities: Dehradun and New Delhi

Sharma

2024

Preprint

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Seismic hazard estimation is the primary step in performance-based earthquake engineering (PBEE). In addition to accurately estimating the median or mean hazard, it is essential to capture its distribution, which can be used for ground motion selection. This study performs a probabilistic seismic hazard assessment (PSHA) to estimate the seismic hazard at two sites in Northern India, i.e., Dehradun and New Delhi. The median uniform hazard spectra (UHS) are used to specify the seismic hazard at eight return periods. The obtained median UHS at the maximum considered earthquake (MCE) for both locations are significantly (up to four times) different from each other. However, both cities are grouped into the same seismic zone (Zone IV) by the Indian codes. Disaggregation results for both sites are also presented. The major contribution at the Dehradun site comes from closely (less than 50 km) located seismic sources of varying magnitude (5.5–8.5). On the other hand, the contribution to hazard at the New Delhi site comes from sources belonging to one of two sets: (1) lower magnitudes (5.5–6.5) sources located within 150 km, and (2) higher magnitude (7.5–8.5) sources located farther away (200 km-350 km).

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“…La evaluaci ón del riesgo por fen ómenos de origen natural, permite analizar el impacto probable de los fen ómenos naturales, identificados en el área de influencia, en caso de presentarse estos fen ómenos dados en un determinado escenario de riesgo que se plantea en este estudio. Sreejaya et al(2022), realizaron un análisis probabilístico del riesgo sísmico de la India y regiones cercanas, con el fin de obtener un mapa nacional de amenazas sísmicas. En los mapas se observa valores de riesgo más elevados en las regiones de Hindukush-Pamir y el noreste de la India, mientras que el centro de la India y las regiones del sur de la península son menos propensos a la amenaza sísmica, los aportes de la investigaci ón son los mapas que se usaran en el dise ño sísmico de estructuras, vulnerabilidad, y como insumo para actualizar las disposiciones del c ódigo existente.…”

Section: Introducci óNunclassified

Evaluación de riesgo por sismo en el centro histórico de Huaraz, distrito de Huaraz, Huaraz - Ancash

Aranda Leiva,

Milla Vergara,

Tinoco Meyhuay

2023

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El objetivo es identificar el peligro, la vulnerabilidad y el riesgo del centro histórico de Huaraz debido a la ocurrencia de un sismo. Mediante el uso del manual para la evaluación de riesgos originados por fenómenos naturales en su segunda versión elaborada por el Centro Nacional de Estimación, Prevención y Reducción del Riesgo de Desastre (CENEPRED) se pudo determinar los niveles y mapas de peligro, vulnerabilidad y riesgo. Realizado el trabajo de campo se pudo obtener información de los factores, condicionantes y desencadenantes que fueron relacionados mediante el método multicriterio para un análisis semi cuantitativo, que influirán en los 152 lotes evaluados, fue así que se encontró que 70 lotes presentan un nivel de peligro muy alto y 82 lotes presentan un nivel de peligro alto. Además, se determinó que 55 lotes presentan vulnerabilidad muy alta, 84 lotes vulnerabilidad alta y 13 lotes vulnerabilidad media. La superposición del mapa de peligro y el mapa de vulnerabilidad determinó el riesgo sísmico, encontrándose que el 37% de lotes están en riesgo muy alto y el 63% de lotes están en riesgo alto.

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Seismic hazard map of India and neighbouring regions

Cited by 23 publications

References 61 publications

Risk‐targeted importance factors for prescriptive seismic design of critical buildings

Risk‐targeted importance factors for prescriptive seismic design of critical buildings

Disaggregation of probabilistic seismic hazard for two Indian cities: Dehradun and New Delhi

Evaluación de riesgo por sismo en el centro histórico de Huaraz, distrito de Huaraz, Huaraz - Ancash

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