Damage and loss assessment for the basic earthquake insurance claim of residential RC buildings in Taiwan

Comprehensive methodologies based on a fully probabilistic approach (i.e., the performance-based earthquake engineering approach, PBEE), represent a refined and accurate tool for the seismic performance assessment of structures. However, those procedures are suitable for building-specific evaluations, appearing extremely time-consuming if applied at the urban scale. In the proposed contribution, simplified loss assessment procedure will be applied at the urban scale with reference to the residential building stock of the center of Potenza. After the identification of the main reinforced concrete (RC) structural typologies and the definition of specific archetype building numerical models, the direct estimation of expected annual loss (DEAL) methodology will be applied to derive the EAL (i.e., expected annual loss) of RC buildings, deriving information on the effectively seismic quality (or seismic resilience) of the aforementioned built heritage at urban scale. Similarly, the monetary losses associated with downtime are evaluated. Preliminary considerations on the socio-economic effects of seismic scenarios on the territorial scale are also proposed.

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Developing analytical tsunami fragility functions for Italian coastal communities

10.5194/egusphere-egu2020-12805 ◽

2020 ◽

Author(s):

Marta Del Zoppo ◽

Marco Di Ludovico ◽

Andrea Prota

Keyword(s):

Design Procedure ◽

Coastal Communities ◽

Fragility Functions ◽

Rc Buildings ◽

Loss Assessment ◽

Tsunami Risk ◽

Damage States ◽

Physical Assets ◽

Definition Of ◽

Tsunami Fragility

<p>In a probabilistic tsunami risk assessment framework, the definition of vulnerability of the physical assets of coastal communities plays a fundamental role. Therefore, current research is moving towards the definition of a general methodology for developing analytical tsunami fragility functions for the physical assets to be used in loss-assessment frameworks at community scale. Herein a methodology is proposed for developing analytical tsunami fragility functions and its application on an inventory of RC buildings representative of the Mediterranean coastal communities is illustrated. Simple mechanics-based models are defined for the damage assessment of reinforced concrete (RC) buildings with breakaway infills under tsunami lateral loads. A simulated design procedure is adopted for the definition of the buildings inventory, relying on Monte Carlo simulation to account for geometrical and mechanical uncertainties. One key feature of the approach is that intermediate damage states prior to collapse are defined to account for light/moderate damage to both structural and non-structural components subjected to tsunami onshore flows.</p>

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Displacement-Based Simplified Seismic Loss Assessment of Post-70s RC Buildings

Journal of Earthquake Engineering ◽

10.1080/13632469.2020.1735577 ◽

2020 ◽

Vol 24 (sup1) ◽

pp. 114-145 ◽

Cited By ~ 2

Author(s):

Luca Landi ◽

Daniel Saborio-Romano ◽

David P. Welch ◽

Timothy J. Sullivan

Keyword(s):

Rc Buildings ◽

Loss Assessment ◽

Seismic Loss ◽

Displacement Based ◽

Seismic Loss Assessment

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Simplified seismic loss assessment for optimal structural retrofit of RC buildings

Earthquake Spectra ◽

10.1177/8755293020952441 ◽

2020 ◽

pp. 875529302095244

Author(s):

Roberto Gentile ◽

Carmine Galasso

Keyword(s):

Time History ◽

Economic Loss ◽

Decision Criterion ◽

Mechanism Analysis ◽

Rc Buildings ◽

Loss Assessment ◽

Concrete Walls ◽

Analysis Methods ◽

Seismic Loss ◽

Seismic Loss Assessment

This study deals with selecting optimal seismic retrofit solutions for reinforced concrete (RC) buildings. To this aim, multi-criteria decision-making (MCDM) is implemented explicitly considering earthquake-induced economic loss as a decision criterion. Fragility (i.e. likelihood of damage levels vs intensity measure ( IM) levels) and vulnerability (i.e. likelihood of loss levels vs IM levels) relationships are derived by using three increasingly refined analysis methods: Simple Lateral Mechanism Analysis; numerical pushover; time-history analysis. A seismically deficient RC school index building, with construction details typical of developing countries, is used for illustrative purposes. Concrete jacketing, addition of concrete walls, and addition of steel braces are the considered retrofit alternatives. Intensity-based expected loss and expected annual loss are adopted in the MCDM, among other criteria, independently derived with the three analysis methods. It is shown that, given the adopted loss-analysis methodology, the ranking of the retrofit alternatives is insensitive to both analysis methods and loss metrics, even when the weight for the seismic loss criterion is high. These findings suggest that simplified methods can be effectively employed in the conceptual/preliminary design of retrofit alternatives.

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Seismic Loss Estimation in Pre-1970 Residential RC Buildings: The Role of Infills and Services in Low–Mid-Rise Case Studies

Frontiers in Built Environment ◽

10.3389/fbuil.2020.589230 ◽

2020 ◽

Vol 6 ◽

Author(s):

Carlo Del Gaudio ◽

Maria Teresa De Risi ◽

Santa Anna Scala ◽

Gerardo Mario Verderame

Keyword(s):

Case Studies ◽

Pushover Analysis ◽

Economic Loss ◽

Loss Estimation ◽

Lessons Learned ◽

Rc Buildings ◽

Loss Assessment ◽

Ground Acceleration ◽

Masonry Infills

The lessons learned after recent earthquakes have highlighted the key role played by infills and services in damage and loss of Reinforced Concrete (RC) buildings. Their influence in seismic performance and loss estimation of selected RC building case studies is thoroughly analyzed here. The case study selection aims to be representative of existing buildings built in Italy before 1970, and covers a different number of stories and design typologies. The seismic responses of the case-study buildings are numerically analyzed by means of non-linear static pushover analysis (PO) considering a lumped plasticity approach with a quadri-linear flexural response for beam/column elements (properly calibrated for RC elements reinforced with plain bars) and a tri-linear compressive-only axial response with diagonal concentric struts for infill panels (empirically derived from experimental data on hollow clay masonry walls). Economic loss estimation is carried out via a component-based methodology that relies on the main repairing activities and resultant costs required for the refurbishment of infills and services for different damage levels. Accordingly, a damage analysis is performed herein, given the intensity measure, based on a comparison between Interstory drift demand from PO analysis and drift-based fragility functions specific for masonry infills. Loss curves, relating the total building repair cost to peak ground acceleration (PGA), are presented and compared for the analyzed case study buildings to show their trends and quantify the incidence of infills and services with respect to the reconstruction cost. A comparison between these outcomes and those recently found in the literature emphasizes the robustness of the considered approach and the reliability of the hypotheses about damage and loss assessment.

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Earthquake insurance loss assessments for regions of Australia

Bulletin of the New Zealand Society for Earthquake Engineering ◽

10.5459/bnzsee.30.1.32-39 ◽

1997 ◽

Vol 30 (1) ◽

pp. 32-39

Author(s):

R. B. Shephard ◽

E. G. C. Smith ◽

D. D. Spurr

Keyword(s):

Analytical Models ◽

Insurance Companies ◽

Insurance Company ◽

Analysis Model ◽

Loss Assessment ◽

Earthquake Insurance ◽

Study Region ◽

Maximum Loss ◽

Probable Maximum Loss ◽

Commissioned Works

Following the Newcastle earthquake of December 1989, a consortium of Australian insurance companies commissioned Works Consultancy Services Ltd, New Zealand to undertake earthquake probable maximum loss assessments for the main city centres of Australia. Studies have been completed for the regions around Sydney, Melbourne, Adelaide, Perth and Brisbane. Customised insurance loss assessment models were developed for each study region, with each including specific analytical models for geography, seismicity, ground conditions, patterns of building construction, and insurance company exposures. The analysis model includes earthquake insurance loss versus shaking intensity relationships derived from Australian and international data, and takes specific building vulnerabilities into account. Loss assessments target the Probable Maximum Loss in relation to return period.

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