Experimental Evaluation of Member-by-Member Models and Damage Indices for Infilled Frames

Colangelo, Felice

doi:10.1080/13632460309350440

Cited by 18 publications

(18 citation statements)

References 16 publications

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“…On the other hand, the softening stiffness is characterized by a large variability depending on the specific kind of infill (mechanical properties, type of bricks, etc.). IDR |DS3 could be assumed in the range [0.8% ÷ 1.6%], whose boundary values are similar respectively to that in Dolšek and Fajfar (2008), and Colangelo (2003;2012). It is worth noting that IDR ranges considered above are characteristic of clay hollow brick infills, typical in the Mediterranean area, and for which a fair number of experimental tests are available in literature.…”

Section: Damage Analysis and Seismic Capacitiesmentioning

confidence: 99%

“…Considering steel yielding strength as random variable, its PDF can be assumed equal to that of the overstrength factor R  (=f y /f d ). Finally, IDR thresholds' distributions at a given DS (IDR |DSi ) can be evaluated according to data available in Colangelo (2012) and based on experimental data provided by the same author (Colangelo, 2003).…”

Section: Fragility Curves and Uncertaintiesmentioning

confidence: 99%

“…Medians assumed for the random variables vary in the ranges provided in section 3.2. Median value of  cr is based on experimental, numerical data (e.g., Colangelo, 2003;Dolsek and Fajfar, 2004), not discarding code suggestions for this parameter (CS. LL.…”

Section: Fast Calibration On Pettino Fragilitiesmentioning

confidence: 99%

“…In a pure mechanical approach, IDR |DS2 could be evaluated as the drift corresponding to the peak of infill backbone according to Fardis' model (1997). IDR |DS2 could be assumed in the range [0.2% ÷ 0.4%], whose boundary values are similar, respectively, to that in Dolšek and Fajfar (2008), and Colangelo (2003;2012).  DS3: large cracks in partition and infill walls, failure of individual infill panels.…”

Section: Damage Analysis and Seismic Capacitiesmentioning

confidence: 99%

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Analytical versus observational fragilities: the case of Pettino (L’Aquila) damage data database

Luca

Verderame

Manfredi

2014

Bull Earthquake Eng

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Section: Damage Analysis and Seismic Capacitiesmentioning

confidence: 99%

Section: Fragility Curves and Uncertaintiesmentioning

confidence: 99%

Section: Fast Calibration On Pettino Fragilitiesmentioning

confidence: 99%

Section: Damage Analysis and Seismic Capacitiesmentioning

confidence: 99%

See 2 more Smart Citations

Analytical versus observational fragilities: the case of Pettino (L’Aquila) damage data database

Luca

Verderame

Manfredi

2014

Bull Earthquake Eng

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“…[9][10][11][12]. These were rarely experimentally investigated [13][14][15][16][17][18][19][20][21] and there is a lack of code provisions [22] regarding their seismic assessment and strengthening interventions. Fourteen different 1/2 scale specimens representing these structures were tested in the scope of an extensive experimental campaign.…”

Section: Introductionmentioning

confidence: 99%

Ciklična ispitivanja jednorasponskih slabih okvira sa zidanom ispunom

Gazić¹,

Sigmund²

2016

JCE

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Experimental test results for fourteen samples of single-span, single-storey, nonseismically designed reinforced-concrete (weak) masonry infill frames are presented in the paper. The samples, scaled 1 to 2, were subjected to the approximately constant vertical and in-plane horizontal cyclic load. Various geometrical and mechanical properties of reinforced-concrete frames and masonry infill were considered. Equations for estimating the interstorey drift ratio at the limit states under study are proposed based on testing conducted in the paper. Ciklična ispitivanja jednorasponskih slabih okvira sa zidanom ispunom U radu su prikazani rezultati eksperimentalnih istraživanja četrnaest uzoraka jednorasponskih, jednoetažnih, neseizmički projektiranih armiranobetonskih (slabih) okvira sa zidanom ispunom, izvedenih u mjerilu 1:2. Uzorci su ispitani pod približno konstantnim vertikalnim i ravninskim horizontalnim cikličnim opterećenjem. Promatrani su različiti parametri uzoraka u pogledu geometrijskih i mehaničkih karakteristika armiranobetonskih okvira i zidane ispune. Na temelju provedenih ispitivanja predložene su jednadžbe za procjenu relativnog međukatnog pomaka pri promatranim graničnim stanjima.

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A simple model to include fuzziness in the seismic fragility curve and relevant effect compared with randomness

Colangelo

2011

Earthq Engng Struct Dyn

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SUMMARY Damage has to be quantified in civil structures to assess their seismic performance and risk and loss on a regional scale. Fragility curves have proved to be suitable for coping with randomness inherent in such an issue. Recently, the cognitive source of uncertainty has been stressed. Because the seismic limit states are defined descriptively more than analytically, fuzziness is inherent as well. In this study, a model to include fuzziness in the seismic fragility curve is implemented and appraised. First, several methods to compute seismic fragility are briefly reviewed. Consistent with the first‐order second‐moment reliability method, a simple extension is proposed and the explicit formulation of the probability measure is derived. Conclusions about the effect of fuzziness are drawn based on this analytical formulation. Above all, fragility increases at lower seismic intensity, whereas it decreases at higher intensity. Steepness of the fragility curve, that is, sensitivity to the ground motion, decreases with increase of fuzziness. This effect is shown to be similar to the effect of randomness. However, the greater the randomness, the smaller is the importance of fuzziness. Fuzziness aside, deterministic capacity may give excessive overestimation of fragility. A numerical example is presented. The fuzzy random fragility curves of a masonry infilled reinforced concrete frame are compared with the curves with fuzziness neglected and with different degrees of randomness. All results by the proposed model are reasonable. Copyright © 2011 John Wiley & Sons, Ltd.

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Experimental Evaluation of Member-by-Member Models and Damage Indices for Infilled Frames

Cited by 18 publications

References 16 publications

Analytical versus observational fragilities: the case of Pettino (L’Aquila) damage data database

Analytical versus observational fragilities: the case of Pettino (L’Aquila) damage data database

Ciklična ispitivanja jednorasponskih slabih okvira sa zidanom ispunom

A simple model to include fuzziness in the seismic fragility curve and relevant effect compared with randomness

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