Probabilistic fragility analysis: A tool for assessing design rules of RC buildings

Lagaros, Nikos D.

doi:10.1007/s11803-008-0823-x

Cited by 29 publications

(15 citation statements)

References 24 publications

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“…For instance, in earthquake engineering (Ellingwood, 2001;Li and Ellingwood, 2007;Lagaros, 2008) or for RC structures subjected to blast loading (Low and Hao, 2001), the latter technique is often used. In hydraulic risk research, some studies focus on assessing dam safety using reliability methods (Peyras et al, 2012).…”

Section: P Favier Et Al: a Physical Vulnerability Of Rc Walls Loadementioning

confidence: 99%

A reliability assessment of physical vulnerability of reinforced concrete walls loaded by snow avalanches

Favier

Bertrand

Eckert³

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. Snow avalanches are a threat to many kinds of elements (human beings, communication axes, structures, etc.) in mountain regions. For risk evaluation, the vulnerability assessment of civil engineering structures such as buildings and dwellings exposed to avalanches still needs to be improved. This paper presents an approach to determine the fragility curves associated with reinforced concrete (RC) structures loaded by typical avalanche pressures and provides quantitative results for different geometrical configurations. First, several mechanical limit states of the RC wall are defined using classical engineering approaches (Eurocode 2), and the pressure of structure collapse is calculated from the usual yield line theory. Next, the fragility curve is evaluated as a function of avalanche loading using a Monte Carlo approach, and sensitivity studies (Sobol indices) are conducted to estimate the respective weight of the RC wall model inputs. Finally, fragility curves and relevant indicators such a their mean and fragility range are proposed for the different structure boundary conditions analyzed. The influence of the input distributions on the fragility curves is investigated. This shows the wider fragility range and/or the slight shift in the median that has to be considered when a possible slight change in mean/standard deviation/inter-variable correlation and/or the non-Gaussian nature of the input distributions is accounted for.

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Section: P Favier Et Al: a Physical Vulnerability Of Rc Walls Loadementioning

confidence: 99%

A reliability assessment of physical vulnerability of reinforced concrete walls loaded by snow avalanches

Favier

Bertrand

Eckert³

et al. 2014

Nat. Hazards Earth Syst. Sci.

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“…For instance, for buildings exposed to earthquakes, the probability of overpassing a drift limit according to the peak ground acceleration is described via reliability-based numerical fragility curves (Ellingwood, 2001;Kyung and Rosowsky, 2006;Li and Ellingwood, 2007;Lagaros, 2008). On the contrary, for mass flow gravity-driven hazards, few fragility relationships have been developed so far.…”

Section: Introductionmentioning

confidence: 99%

Assessing fragility of a reinforced concrete element to snow avalanches using a non-linear mass-spring model

Favier¹,

Eckert²,

Ousset³

et al. 2017

Preprint

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Abstract. This paper presents an assessment of the fragility of a Reinforced Concrete (RC) element subjected to avalanche loads within a reliability framework. In order to obtain accurate numerical results with supportable computation times, we propose a light and efficient Single-Degree-Of-Freedom (SDOF) numerical model for an RC element. The model represents the behavior of an RC wall, summing up the main physics involved. Non-linearity was taken into account by a moment-curvature approach, which describes the overall bending response until collapse. The SDOF model was validated by a finite element as 5 well as yield line theory analyses. It was then embedded within a reliability framework to evaluate the failure probability as a function of avalanche pressure. Several reliability methods are implemented and compared, suggesting that non-parametric methods provide significant results at a moderate level of computational burden. The sensitivity to material properties, such as tensile and compressive strengths, steel reinforcement ratio, and wall geometry was also investigated. Finally, the obtained fragility curves were discussed with respect to the few proposals available in the snow avalanche engineering field. This 10 systematic approach will prove useful in refining formal and practical risk assessments and could be applied to other similar phenomena that also lack fragility curves.

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“…Due to its critical role in regional seismic risk and loss estimation, many studies have been conducted to determine the seismic fragility of structures under the effect of potential earthquake ground motions (Lagaros, 2008;Vargas et al, 2013; Unnikrishnan et al, 2013;Sengupta and Li, 2014). In the last 20 years, a large number of approaches have been proposed to compute fragility functions, which can be classified into the four generic groups, i.e., the empirical method, the judgmental method, the analytical method, and the hybrid method (Rossetto and Elnashai, 2003).…”

Section: Introductionmentioning

confidence: 99%

Seismic Fragility Assessment of RC Frame-Shear Wall Structures Designed According to the Current Chinese Seismic Design Code

Jiang

Liu

2015

Journal of Asian Architecture and Building Engineering

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After learning from several devastating earthquakes in China in recent years, stricter design criteria have been introduced in the current Chinese seismic design code. To investigate the reliability of the current seismic design code, seismic fragility analyses were performed for 45 10-story reinforced concrete (RC) frame-shear wall structures designed according to the current Chinese seismic design code by analytical methods, considering the uncertainty of earthquake ground motions. The plastic rotation at the ends of the structural component (or the total chord rotation) and the maximum inter-story drift were employed as damage identifiers to quantify the four performance levels, i.e., fully operational, operational, repairable and collapse prevention. Thus, seismic fragility curves corresponding to individual performance levels were developed on the basis of nonlinear time history analyses for the reference RC frame-shear wall structure. The influences of the site soil type, the seismic protection intensity and the performance index on the fragility curves were analyzed. The structural reliability of RC frame-shear wall structures was examined using the developed fragility curves. The results indicate that the seismic performance objectives of RC frame-shear wall structures designed according to the current Chinese seismic design code can be achieved with good reliability.

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Probabilistic fragility analysis: A tool for assessing design rules of RC buildings

Cited by 29 publications

References 24 publications

A reliability assessment of physical vulnerability of reinforced concrete walls loaded by snow avalanches

A reliability assessment of physical vulnerability of reinforced concrete walls loaded by snow avalanches

Assessing fragility of a reinforced concrete element to snow avalanches using a non-linear mass-spring model

Seismic Fragility Assessment of RC Frame-Shear Wall Structures Designed According to the Current Chinese Seismic Design Code

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