Documents disponibles écrits par cet auteur

Effects of pressure equalization on the performance of residential wall systems under extreme wind loads / Gregory A. Kopp in Journal of structural engineering, Vol. 138 N° 4 (Avril 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 4 (Avril 2012) . - pp. 526–538 Titre : Effects of pressure equalization on the performance of residential wall systems under extreme wind loads Type de document : texte imprimé Auteurs : Gregory A. Kopp, Auteur ; Eri Gavanski, Auteur Année de publication : 2012 Article en page(s) : pp. 526–538 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Full-scale  tests  Hurricanes  Walls  Wind  loads  Wood  structure Résumé : During strong windstorms, sheathing and siding on residential, wood-framed, wall systems have commonly failed. In the current study, a clear difference is observed in the rate of failure occurrence for wall sheathing above or below the eaves. This observation can be explained from tests examining ultimate capacities and pressure equalization of both single- and multilayer residential, wood-framed, wall systems using realistic fluctuating loads. The results indicate that pressure equalization is a critical parameter in the performance of both the cladding and exterior sheathing. With interior sheathing included, significant pressure equalization was observed to occur across the exterior sheathing, because pressure equalization is observed to increase with load (and damage) levels. This substantially increases the ultimate capacity of these wall systems; however, the construction details of the various exterior layers play an important role in the levels of pressure equalization across each layer. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000476 [article] Effects of pressure equalization on the performance of residential wall systems under extreme wind loads [texte imprimé] / Gregory A. Kopp, Auteur ; Eri Gavanski, Auteur . - 2012 . - pp. 526–538. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 4 (Avril 2012) . - pp. 526–538 Mots-clés : Full-scale  tests  Hurricanes  Walls  Wind  loads  Wood  structure Résumé : During strong windstorms, sheathing and siding on residential, wood-framed, wall systems have commonly failed. In the current study, a clear difference is observed in the rate of failure occurrence for wall sheathing above or below the eaves. This observation can be explained from tests examining ultimate capacities and pressure equalization of both single- and multilayer residential, wood-framed, wall systems using realistic fluctuating loads. The results indicate that pressure equalization is a critical parameter in the performance of both the cladding and exterior sheathing. With interior sheathing included, significant pressure equalization was observed to occur across the exterior sheathing, because pressure equalization is observed to increase with load (and damage) levels. This substantially increases the ultimate capacity of these wall systems; however, the construction details of the various exterior layers play an important role in the levels of pressure equalization across each layer. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000476

Storm and gust duration effects on design wind loads for glass / Eri Gavanski in Journal of structural engineering, Vol. 137 N° 12 (Décembre 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1603-1610 Titre : Storm and gust duration effects on design wind loads for glass Type de document : texte imprimé Auteurs : Eri Gavanski, Auteur ; Gregory A. Kopp, Auteur Année de publication : 2012 Article en page(s) : pp. 1603-1610 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Standards  and  codes  Wind  loads  Window  glass Résumé : Duration effects on the design wind loads for glass are examined with respect to ASCE 7-10. Pressure time histories are created by combining variations of wind speed and wind direction from a “design cyclone” with pressure coefficients obtained from wind tunnel tests of low-rise buildings. The results indicate that the assumption of a 3-s gust duration in ASCE 7-10 may underestimate appropriate values for design loads for glass, with the degree of underestimation varying, depending primarily on the probability of exceedence of the peak pressures. On the basis of these results, modifications to the peak pressures specified in ASCE 7-10 are suggested that maintain the time duration of 3-s, consistent with current glass-design provisions. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i12/p1603_s1?isAuthorized=no [article] Storm and gust duration effects on design wind loads for glass [texte imprimé] / Eri Gavanski, Auteur ; Gregory A. Kopp, Auteur . - 2012 . - pp. 1603-1610. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1603-1610 Mots-clés : Standards  and  codes  Wind  loads  Window  glass Résumé : Duration effects on the design wind loads for glass are examined with respect to ASCE 7-10. Pressure time histories are created by combining variations of wind speed and wind direction from a “design cyclone” with pressure coefficients obtained from wind tunnel tests of low-rise buildings. The results indicate that the assumption of a 3-s gust duration in ASCE 7-10 may underestimate appropriate values for design loads for glass, with the degree of underestimation varying, depending primarily on the probability of exceedence of the peak pressures. On the basis of these results, modifications to the peak pressures specified in ASCE 7-10 are suggested that maintain the time duration of 3-s, consistent with current glass-design provisions. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i12/p1603_s1?isAuthorized=no