Empirical fragility curves from damage data on RC buildings after the 2009 L’Aquila earthquake

2016 ◽  
Vol 15 (4) ◽  
pp. 1425-1450 ◽  
Author(s):  
Carlo Del Gaudio ◽  
Giuseppina De Martino ◽  
Marco Di Ludovico ◽  
Gaetano Manfredi ◽  
Andrea Prota ◽  
...  
Keyword(s):  
Fragility Curves ◽  
L’Aquila Earthquake ◽  
Rc Buildings ◽  
2009 L’Aquila Earthquake ◽  
Damage Data

Repair Costs of Existing RC Buildings Damaged by the L'Aquila Earthquake and Comparison with FEMA P-58 Predictions

2018 ◽  
Vol 34 (1) ◽  
pp. 237-263 ◽  
Author(s):  
Ciro Del Vecchio ◽  
Marco Di Ludovico ◽  
Stefano Pampanin ◽  
Andrea Prota
Keyword(s):  
Ad Hoc ◽  
Mediterranean Area ◽  
Seismic Events ◽  
L’Aquila Earthquake ◽  
Rc Buildings ◽  
Building Stock ◽  
Nonstructural Components ◽  
Repair Costs ◽  
2009 L’Aquila Earthquake ◽  
Different Types

Recent seismic events are a unique opportunity to monitor and collect details of direct repair costs and the downtimes associated with massive reconstruction processes. This paper focuses on the actual repair costs of five RC buildings damaged by the 2009 L'Aquila earthquake. The repair costs for structural and nonstructural components that experienced different types of earthquake damage are discussed and then used as a benchmark for the predictions. The comparison at both the building and component levels revealed that the FEMA P-58 methodology is suitable, in general, for application to different types of building stock. Ad hoc upgrades to the FEMA fragility database for components that are typical of the Mediterranean area are required. When implementing the proposed modifications, a reasonable level of consistency is achieved in terms of actual and predicted repair costs (differences in the range of 30–48%). A discussion on the actual repair costs and the main differences with the predicted costs for infills and partitions, structural subassemblies, floor finishes, and other acceleration-sensitive nonstructural components is provided, along with suggestions for further improving.

scholarly journals Evaluation and considerations about fundamental periods of damaged reinforced concrete buildings

2013 ◽  
Vol 13 (7) ◽  
pp. 1903-1912 ◽  
Author(s):  
R. Ditommaso ◽  
M. Vona ◽  
M. R. Gallipoli ◽  
M. Mucciarelli
Keyword(s):  
Reinforced Concrete ◽  
Structural Damage ◽  
Fundamental Period ◽  
L’Aquila Earthquake ◽  
Reinforced Concrete Buildings ◽  
Rc Buildings ◽  
Damage Level ◽  
Concrete Buildings ◽  
2009 L’Aquila Earthquake ◽  
Code Provisions

Abstract. The aim of this paper is an empirical estimation of the fundamental period of reinforced concrete buildings and its variation due to structural and non-structural damage. The 2009 L'Aquila earthquake has highlighted the mismatch between experimental data and code provisions value not only for undamaged buildings but also for the damaged ones. The 6 April 2009 L'Aquila earthquake provided the first opportunity in Italy to estimate the fundamental period of reinforced concrete (RC) buildings after a strong seismic sequence. A total of 68 buildings with different characteristics, such as age, height and damage level, have been investigated by performing ambient vibration measurements that provided their fundamental translational period. Four different damage levels were considered according with the definitions by EMS 98 (European Macroseismic Scale), trying to regroup the estimated fundamental periods versus building heights according to damage. The fundamental period of RC buildings estimated for low damage level is equal to the previous relationship obtained in Italy and Europe for undamaged buildings, well below code provisions. When damage levels are higher, the fundamental periods increase, but again with values much lower than those provided by codes. Finally, the authors suggest a possible update of the code formula for the simplified estimation of the fundamental period of vibration for existing RC buildings, taking into account also the inelastic behaviour.

scholarly journals Fragility estimation for global building classes using analysis of the Cambridge earthquake damage database (CEQID)

2021 ◽  
Author(s):  
Robin Spence ◽  
Sandra Martínez-Cuevas ◽  
Hannah Baker
Keyword(s):  
Fragility Curves ◽  
Resistance Index ◽  
Earthquake Damage ◽  
Ground Acceleration ◽  
Damage Level ◽  
Ground Motion Parameter ◽  
Geographical Regions ◽  
Concrete Building ◽  
Damage Data ◽  
Regional Comparisons

AbstractThis paper describes CEQID, a database of earthquake damage and casualty data assembled since the 1980s based on post-earthquake damage surveys conducted by a range of research groups. Following 2017–2019 updates, the database contains damage data for more than five million individual buildings in over 1000 survey locations following 79 severely damaging earthquakes worldwide. The building damage data for five broadly defined masonry and reinforced concrete building classes has been assembled and a uniform set of six damage levels assigned. Using estimated peak ground acceleration (PGA) for each survey location based on USGS Shakemap data, a set of lognormal fragility curves has been developed to estimate the probability of exceedance of each damage level for each class, and separate fragility curves for each of five geographical regions are presented. A revised set of fragility curves has also been prepared in which the bias in the curve resulting from the uncertainty in the ground motion parameter has been removed. The uncertainty in the fragility curves is evaluated and discussed and the curves are compared with those from other studies. A resistance index for each class of building is developed and cross-regional comparisons using this resistance index are presented.

scholarly journals Mechanics-based fragility curves for Italian residential URM buildings

2020 ◽  
Author(s):  
Marco Donà ◽  
Pietro Carpanese ◽  
Veronica Follador ◽  
Luca Sbrogiò ◽  
Francesca da Porto
Keyword(s):  
Reference Model ◽  
Fragility Curves ◽  
National Level ◽  
Building Stock ◽  
Damage Scenarios ◽  
Complex Evaluation ◽  
Proposed Model ◽  
2009 L’Aquila Earthquake ◽  
Damage States ◽  
Observed Damage

Abstract Seismic risk assessment at the territorial level is now widely recognised as essential for countries with intense seismic activity, such as Italy. Academia is called to give its contribution in order to synergically deepen the knowledge about the various components of this risk, starting from the complex evaluation of vulnerability of the built heritage. In line with this, a mechanics-based seismic fragility model for Italian residential masonry buildings was developed and presented in this paper. This model is based on the classification of the building stock in macro-typologies, defined by age of construction and number of storeys, which being information available at national level, allow simulating damage scenarios and carrying out risk analyses on a territorial scale. The model is developed on the fragility of over 500 buildings, sampled according to national representativeness criteria and analysed through the Vulnus_4.0 software. The calculated fragility functions were extended on the basis of a reference model available in the literature, which provides generic fragilities for the EMS98 vulnerability classes, thus obtaining a fragility model defined on the five EMS98 damage states. Lastly, to assess the reliability of the proposed model, this was used to simulate damage scenarios due to the 2009 L’Aquila earthquake. Overall, the comparison between model results and observed damage showed a good fit, proving the model effectiveness.

scholarly journals Stress and Burnout in Health-Care Workers after the 2009 L’Aquila Earthquake: A Cross-Sectional Observational Study

2017 ◽  
Vol 8 ◽  
Author(s):  
Antonella Mattei ◽  
Fabiana Fiasca ◽  
Mariachiara Mazzei ◽  
Stefano Necozione ◽  
Valeria Bianchini
Keyword(s):  
Health Care ◽  
Observational Study ◽  
Health Care Workers ◽  
L’Aquila Earthquake ◽  
Cross Sectional ◽  
Care Workers ◽  
2009 L’Aquila Earthquake

scholarly journals Long-term blood pressure changes induced by the 2009 L’Aquila earthquake: assessment by 24h ambulatory monitoring

2013 ◽  
Vol 36 (9) ◽  
pp. 795-798 ◽  
Author(s):  
Paolo Giorgini ◽  
Rinaldo Striuli ◽  
Marco Petrarca ◽  
Luisa Petrazzi ◽  
Paolo Pasqualetti ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Ambulatory Monitoring ◽  
L’Aquila Earthquake ◽  
2009 L’Aquila Earthquake ◽  
Pressure Changes ◽  
Earthquake Assessment

Calibration of vulnerability and fragility curves from moderate intensity Italian earthquake damage data

2021 ◽  
pp. 102676
Author(s):  
Giovanni Menichini ◽  
Viola Nistri ◽  
Sonia Boschi ◽  
Emanuele Del Monte ◽  
Maurizio Orlando ◽  
...  
Keyword(s):  
Fragility Curves ◽  
Earthquake Damage ◽  
Moderate Intensity ◽  
Damage Data ◽  
Italian Earthquake
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