Two frugal options to assess class fragility and seismic safety for low-rise reinforced concrete school buildings in Southern Italy

Ruggieri, Sergio; Porco, Francesco; Uva, Giuseppina; Vamvatsikos, Dimitrios

doi:10.1007/s10518-020-01033-5

Cited by 68 publications

(31 citation statements)

References 52 publications

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“…This observation implies that most of the damaged Italian school buildings can be classified as low-rise buildings (this evidence is also reported in several scientific works, e.g. [25,27]). No particular evidence can be extracted from the inter-storey height parameter: about 85% of the RC school buildings presents values that range from 2.50 m and 3.50 m, while the remaining 15% presents higher values.…”

Section: School Buildings Damaged By Italian Earthquakes: Statistical Analysis On the Specific-class Parameterssupporting

confidence: 75%

“…Specific studies dealing with the seismic vulnerability assessment of relevant building typologies, such as schools [15][16][17], hospitals [18] and ecclesiastic heritage [19][20][21][22] are also available. Among the most common approaches adopted to assess and mitigate seismic risk, it is worthwhile mentioning also mechanical-based approaches [23][24][25], rapid visual screening (RVS) methodologies [26][27] and hybrid methods.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Post-Earthquake Damages on Italian School Buildings Portfolio Over the Last 50 Years

Ruggieri¹,

Tosto²,

Perrone³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The Italian peninsula has been subjected to several destructive earthquakes over the last 50 years which denoted the high vulnerability of the existing building stock. In this context, the analysis of post-earthquake damages is of paramount importance for manifold reasons, such as the management of the emergency phase for establishing the usability of buildings and the identification of the main sources of vulnerability for future risk mitigation plans. Since about 50 years, the post-earthquake usability of buildings is assessed through simplified forms filled by experts and practitioners during extensive in-situ inspections. The data collected during the post-earthquake inspections have been recently catalogued in the Observed Damage Database (DA.D.O), which is a freely available platform for the scientific community. Starting from the data available in the DA.D.O platform, the damage reported by Italian school buildings have been analyzed in order to elaborate a proper school buildings database. The results of this statistical investigation are used for identifying the main sources of vulnerability characterizing the Italian school buildings and assuming a key role for the empirical calibration of reliable procedures of large-scale seismic risk assessment, mapping and reduction.

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Section: School Buildings Damaged By Italian Earthquakes: Statistical Analysis On the Specific-class Parameterssupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Assessment of Post-Earthquake Damages on Italian School Buildings Portfolio Over the Last 50 Years

Ruggieri¹,

Tosto²,

Perrone³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

Self Cite

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show abstract

“…In order for the analysis results to be realistic, member resistance skeleton curves must necessarily reflect the brittle modes of failure that typically prevail in poorly reinforced members, a feature that leads to an unstable solution and lack of convergence with most Newton-Raphson type schemes used to perform nonlinear structural analysis. This also affects the post-processing of the numerical analysis results [28,29].…”

Section: Introductionmentioning

confidence: 99%

On the Modeling and Analysis of Brittle Failure in Existing R/C Structures Due to Seismic Loads

2022

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Brittle failure is often observed in older reinforced concrete (R/C) buildings that have been designed prior to the 1980s following an earthquake event. Since this has ramifications on any subsequent repair protocol, it is important to quantify the remaining strength capacity for this class of building to determine a retrofit strategy. Following along these lines, an analytical-numerical methodology is presented for use as a third-tier seismic assessment which is based on a previously developed second-tier strength assessment criterion coming from a procedure known as Rapid Seismic Assessment (RSA). The assessment framework is performance-based, aiming to determine whether estimated local drift demands can be tolerated without failure developing along the load resistance path of substandard R/C buildings. This enables the development of guidelines for modeling all possible strength mechanisms that occur in the structural system of substandard R/C buildings. An application example using data provided by a benchmark experiment involving a full-scale R/C building helps to illustrate and then validate the proposed modeling procedures and establish their accuracy and efficiency for use by practicing engineers.

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“…Despite the similarities between seismic and blast loadings, the global response of buildings subjected to blast loading is not usually critical. In the other words, for a structure that is affected by an explosion, only its critical members (i.e., closer to detonation) are individually assessed and designed by means of different methods (SDOF and FE models) and damage criteria (support rotation and damage index), while for building structures under the effects of earthquake loadings, the global deformations (inter-story drifts) must be evaluated based on the desired performance level (life safety) as the most important response parameter [71,72]. In the design of structures under seismic and blast loading, the desirable features of design-that is, the provision for ductility in member response and increasing the ability to redistribute extreme loads to lesser-loaded elements-must be satisfied.…”

Section: Damage Evaluation Assessment Based On Damage Index Criterionmentioning

confidence: 99%

An Efficient Reliability-Based Approach for Evaluating Safe Scaled Distance of Steel Columns under Dynamic Blast Loads

et al. 2021

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Damage to building load-bearing members (especially columns) under explosions and impact are critical issues for structures, given that they may cause a progressive collapse and remarkably increase the number of potential victims. One of the best ways to deal with this issue is to provide values of safe protective distance (SPD) for the structural members to verify, so that the amount of damage (probability of exceedance low damage) cannot exceed a specified target. Such an approach takes the form of the so-called safe scaled distance (SSD), which can be calculated for general structural members but requires dedicated and expensive studies. This paper presents an improved calculation method, based on structural reliability analysis, to evaluate the minimum SSD for steel columns under dynamic blast loads. An explicit finite element (FE) approach is used with the Monte Carlo simulation (MCS) method to obtain the SSD, as a result of damage probability. The uncertainties associated with blast and material properties are considered using statistical distributions. A parametric study is thus carried out to obtain curves of probability of low damage for a range of H-shaped steel columns with different size and boundaries. Finally, SSD values are detected and used as an extensive databank to propose a practical empirical formulation for evaluating the SSD of blast loaded steel columns with good level of accuracy and high calculation efficiency.

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Two frugal options to assess class fragility and seismic safety for low-rise reinforced concrete school buildings in Southern Italy

Cited by 68 publications

References 52 publications

Assessment of Post-Earthquake Damages on Italian School Buildings Portfolio Over the Last 50 Years

Assessment of Post-Earthquake Damages on Italian School Buildings Portfolio Over the Last 50 Years

On the Modeling and Analysis of Brittle Failure in Existing R/C Structures Due to Seismic Loads

An Efficient Reliability-Based Approach for Evaluating Safe Scaled Distance of Steel Columns under Dynamic Blast Loads

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