Propagating fragility curve for RC buildings via HAZUS methodology

Evaluación probabilística de fragilidad sísmica para las estructuras de HA, en los barrios periféricos occidentales de la ciudad de Loja.

“…HAZUS (acrónimo de Hazards United States) fue concebida por la FEMA abreviatura de Federal Emergency Management Agency (Patel & Vasanwala, 2019); que contiene modelos probabilísticos para estimar las pérdidas potenciales de una región o área en particular, debido a terremotos, inundaciones y huracanes. Aunque esta metodología se desarrolló con un enfoque en los Estados Unidos, el modelo HAZUS ha sido adoptado por organizaciones de gestión de emergencias en diferentes países (Stumpf et al, 2019).…”

“…La metodología HAZUS exhibe un enfoque simple, preciso y avanzado para el desarrollo de curvas de fragilidad, y la estimación de daño de las infraestructuras ante la acción sísmica. Las curvas de fragilidad constituyen uno de los elementos clave, que correlacionan la intensidad debido a la actividad sísmica, con la probabilidad de alcanzar o superar la intensidad de un estado de daño (leve, moderado, extenso y colapso), (Patel & Vasanwala, 2019).…”

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Earthquakes represent a significant natural hazard, regularly affecting lives and the built environment in earthquake-prone areas around the world, causing social and economic losses, (Guha-Sapir et al, 2016). The HAZUS methodology exhibits a simple, precise and advanced approach for the development of fragility curves, and the estimation of damage (light, moderate, extensive and collapse) of the infrastructures before seismic action, (Patel & Vasanwala, 2019). In Ecuador, municipal governments do not act as an effective urban regulatory agent, it is because there is still a predominance of informal construction.

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Fragility Assesment of Mid-Rise RC Building using HAZUS Method in High Seismic Zone

“…Hazus are developed by FEMA and provide damage and loss function under agreements between National Institutes of Building Sciences (NIBS) and Federal Emergency Management Agency (FEMA). Building fragility curves are lognormal distribution functions that describe the probability of reaching, or exceeding, structural and non-structural damage states, given median estimates of spectral response, for example spectral displacement (V R. Patel & Vasavada, 2016). These curves describe variability and uncertainty associated with capacity curve properties, damage states and ground shaking (V R. Patel & Vasavada, 2016) The damage states of the building that classified by HAZUS is shown in Table 1.…”

“…To calculate the fragility, three main variability is so important to consider. There are capacity curve (C), the variability associated with the demand spectrum (D), and the variability associated with the discrete threshold of each damage state (T,ds) (V R. Patel & Vasavada, 2016). For development of fragility curves the nonlinear static analysis was performed to 5storeys of RC building.…”