Seismic Loss Estimation with Consideration of Aftershock Hazard and Post-Quake Decisions

Han, Ruilong; Li, Yue; Lindt, John van de

doi:10.1061/ajrua6.0000875

Cited by 20 publications

(12 citation statements)

References 19 publications

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“…The results of only mainshocks are also computed for comparison. More information of the assessment procedure was presented in another study [42]. …”

Section: Computation Of the Building Seismic Performance Metricsmentioning

confidence: 98%

Impact of aftershocks and uncertainties on the seismic evaluation of non-ductile reinforced concrete frame buildings

Han

Lindt

2015

Engineering Structures

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“…The results of only mainshocks are also computed for comparison. More information of the assessment procedure was presented in another study [42]. …”

Section: Computation Of the Building Seismic Performance Metricsmentioning

confidence: 98%

Impact of aftershocks and uncertainties on the seismic evaluation of non-ductile reinforced concrete frame buildings

Han

Lindt

2015

Engineering Structures

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“…The fragility groups considered in the assessment, as well as the damage states (DS) and relevant engineering demand parameter (EDP), fragility function parameters of these fragility groups were listed in Table 1. The repair methods and associated repair time for different DS of each fragility groups, the quantity of components of each fragility group, the occupancy model for calculating fatalities, collapse fragility function and repair fragility function of each building are available in Han et al (2015b). …”

Section: Figure 2 the Elevation And Plan Views Of The Buildingsmentioning

confidence: 99%

“…For the purpose of seismic performance assessment and loss estimation, the building replacement costs of the three-story and the six-story building were estimated to be $1,506,000 and $3,491,000, respectively (Ramirez and Miranda 2009, Han et al 2015a, Han et al 2015b. Seismic direct loss (repair cost) was calculated using the story-based loss estimation method (Ramirez and Miranda 2009).…”

Section: Figure 2 the Elevation And Plan Views Of The Buildingsmentioning

confidence: 99%

“…The MS-AS sequences are obtained from multiple stations recorded in different earthquakes, with more information shown in Table 3. Detail inventory with more information about the ground motions were presented in Han et al (2015b).…”

Section: Mainshock-aftershock Ground Motionsmentioning

confidence: 99%

“…The structural responses examined in this study include peak inter story drift ratio (PIDR), residual inter story drift ratio (RIDR), peak floor acceleration (PFA), and peak ground acceleration (PGA). Other details and equations of such assessment procedure can be found in Han et al (2015aHan et al ( , 2015b.…”

Section: Introductionmentioning

confidence: 99%

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Loss Estimation of Reinforced Concrete Buildings Considering Aftershock Hazards

Han¹,

Li²,

Lindt³

2015

Structures Congress 2015

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Current seismic performance methodologies such as FEMA P-58 already have the ability to estimate the direct loss and indirect loss of buildings due to earthquakes using performance based earthquake engineering (PBEE). However, earthquake aftershocks, which have the potential to cause additional damage to buildings, are still not considered in these methodologies. On the other hand, previous seismic performance assessment considering aftershocks cannot account for various post-quake decisions (e.g. evacuation, safety evaluation, and repair), and have been based on simplified models which do not have the capacity to simulate many details. In this study, the effects of aftershocks and post-quake decisions on seismic performance are discussed, and an assessment methodology in accordance with other PBEE based methods that also has the ability to consider aftershocks was developed. As a case study, two reinforced concrete frame buildings are adopted for loss estimation using the proposed method. Eighteen near-fault and 60 far-field recorded mainshock-aftershock sequences are employed in the example. The direct loss and indirect loss (downtime and fatality loss) were investigated and show that significant difference may occur in seismic performance when comparing the scenario with and without considering aftershocks.

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Probabilistic risk assessment for reinforced concrete frame structures subject to mainshock‐aftershock sequences

Zhou,

Lu,

Gardoni

et al. 2024

Earthq Engng Struct Dyn

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Recent earthquakes have highlighted that aftershocks can considerably increase the structural demand and seismic risk of engineering structures. This study presents a probabilistic approach to assess the seismic risk of reinforced concrete (RC) frame structures subjected to mainshock‐aftershock sequences. In this approach, a predictive fragility method is used to evaluate the probabilities of structural damage under sequential excitations. The Bayes theorem is employed to generate posterior distributions of unknown model parameters. Then, a practical seismic hazard assessment method is used to conduct mainshock‐aftershock hazard analysis. The Copula technique is employed to develop a joint distribution model of the mainshock and aftershock intensity measures. Finally, the seismic risk is evaluated using the classical risk integration equation with the mainshock‐aftershock fragilities and hazard surfaces. Confidence bounds for fragilities and seismic risks are also obtained to account for the uncertainties of model parameters caused by aftershocks. The proposed approach is demonstrated by considering a seismic‐designed RC frame building. It can be concluded that aftershocks can significantly increase the seismic risk throughout the entire structural service life. The additional uncertainties caused by aftershocks result in wider confidence bounds for seismic risk.

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Seismic Loss Estimation with Consideration of Aftershock Hazard and Post-Quake Decisions

Cited by 20 publications

References 19 publications

Impact of aftershocks and uncertainties on the seismic evaluation of non-ductile reinforced concrete frame buildings

Impact of aftershocks and uncertainties on the seismic evaluation of non-ductile reinforced concrete frame buildings

Loss Estimation of Reinforced Concrete Buildings Considering Aftershock Hazards

Probabilistic risk assessment for reinforced concrete frame structures subject to mainshock‐aftershock sequences

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