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Behavior of concrete and ECC structures under simulated earthquake motion / Bora Gencturk in Journal of structural engineering, Vol. 139 N° 3 (Mars 2013) 

Public ISBD [article]  in Journal of structural engineering > Vol. 139 N° 3 (Mars 2013) . - pp. 389–399 Titre : Behavior of concrete and ECC structures under simulated earthquake motion Type de document : texte imprimé Auteurs : Bora Gencturk, Auteur ; Amr S. Elnashai, Auteur ; Michael D. Lepech, Auteur Année de publication : 2013 Article en page(s) : pp. 389–399 Note générale : structural engineering Langues : Anglais (eng) Mots-clés : reinforced  concrete;  ECC;  small-scale  testing;  experimental  methods;  hybrid  simulation;  stiffness;  strength;  ductility;  energy  absorption Résumé : The objective of the research presented in this paper is to investigate, experimentally, the effect of material- and section-level parameters on the structural response of concrete and engineered cementitious composite (ECC) buildings. In addition to testing of columns under monotonic, cyclic, and static-time history loading, hybrid simulation of structural frames is conducted. Stiffness, strength, ductility, and energy absorption capacity are selected as the response measures that represent the behavior of structures under seismic actions. The investigated variables are reinforcement ratios, ECC material properties, and axial load levels. The results are proposed as basic guidelines to determine the performance enhancement in terms of stiffness, strength, ductility, and energy absorption capacity, which could be achieved by replacing concrete with the high-performance material ECC. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000667 [article] Behavior of concrete and ECC structures under simulated earthquake motion [texte imprimé] / Bora Gencturk, Auteur ; Amr S. Elnashai, Auteur ; Michael D. Lepech, Auteur . - 2013 . - pp. 389–399. structural engineering Langues : Anglais (eng) in Journal of structural engineering > Vol. 139 N° 3 (Mars 2013) . - pp. 389–399 Mots-clés : reinforced  concrete;  ECC;  small-scale  testing;  experimental  methods;  hybrid  simulation;  stiffness;  strength;  ductility;  energy  absorption Résumé : The objective of the research presented in this paper is to investigate, experimentally, the effect of material- and section-level parameters on the structural response of concrete and engineered cementitious composite (ECC) buildings. In addition to testing of columns under monotonic, cyclic, and static-time history loading, hybrid simulation of structural frames is conducted. Stiffness, strength, ductility, and energy absorption capacity are selected as the response measures that represent the behavior of structures under seismic actions. The investigated variables are reinforcement ratios, ECC material properties, and axial load levels. The results are proposed as basic guidelines to determine the performance enhancement in terms of stiffness, strength, ductility, and energy absorption capacity, which could be achieved by replacing concrete with the high-performance material ECC. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000667

Simulation-based fragility relationships for unreinforced masonry buildings / Thomas M. Frankie in Journal of structural engineering, Vol. 139 N° 3 (Mars 2013) 

Public ISBD [article]  in Journal of structural engineering > Vol. 139 N° 3 (Mars 2013) . - pp. 400–410 Titre : Simulation-based fragility relationships for unreinforced masonry buildings Type de document : texte imprimé Auteurs : Thomas M. Frankie, Auteur ; Bora Gencturk, Auteur ; Amr S. Elnashai, Auteur Année de publication : 2013 Article en page(s) : pp. 400–410 Note générale : structural engineering Langues : Anglais (eng) Mots-clés : masonry;  fragility  relationships;  seismic  vulnerability;  loss  assessment;  capacity  spectrum  method;  HAZUS Résumé : Unreinforced masonry (URM) structures represent a significant portion of the residential building stock of the central and eastern United States. Fifteen percent of homes in the eight-state region impacted by the New Madrid Seismic Zone are URM buildings. The brittle nature of URM buildings further supports a thorough consideration of seismic response given the susceptibility to severe failure modes. Currently, there is a pressing need for analytically based fragility curves for URM buildings. To improve the estimation of damage-state probabilities through the development of simulation-based URM fragilities, an extensive literature survey is conducted on pushover analysis. Using these data, capacity curves are generated, from which damage performance limit states are defined. Demand is simulated using synthetically derived accelerograms representative of the central and eastern United States. Structural response is evaluated using an advanced capacity spectrum method. Capacity, demand, and response are thus derived analytically and utilized to generate a more reliable and uniform set of fragility curves for use in loss-assessment software. This paper presents a framework amenable to rapid, flexible updating that, with the appropriate database of studies, is capable of producing curves representative of any URM building typology subjected to a specified hazard. The curves are expressed in multiple forms to demonstrate capability of use in various loss-assessment applications. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000648 [article] Simulation-based fragility relationships for unreinforced masonry buildings [texte imprimé] / Thomas M. Frankie, Auteur ; Bora Gencturk, Auteur ; Amr S. Elnashai, Auteur . - 2013 . - pp. 400–410. structural engineering Langues : Anglais (eng) in Journal of structural engineering > Vol. 139 N° 3 (Mars 2013) . - pp. 400–410 Mots-clés : masonry;  fragility  relationships;  seismic  vulnerability;  loss  assessment;  capacity  spectrum  method;  HAZUS Résumé : Unreinforced masonry (URM) structures represent a significant portion of the residential building stock of the central and eastern United States. Fifteen percent of homes in the eight-state region impacted by the New Madrid Seismic Zone are URM buildings. The brittle nature of URM buildings further supports a thorough consideration of seismic response given the susceptibility to severe failure modes. Currently, there is a pressing need for analytically based fragility curves for URM buildings. To improve the estimation of damage-state probabilities through the development of simulation-based URM fragilities, an extensive literature survey is conducted on pushover analysis. Using these data, capacity curves are generated, from which damage performance limit states are defined. Demand is simulated using synthetically derived accelerograms representative of the central and eastern United States. Structural response is evaluated using an advanced capacity spectrum method. Capacity, demand, and response are thus derived analytically and utilized to generate a more reliable and uniform set of fragility curves for use in loss-assessment software. This paper presents a framework amenable to rapid, flexible updating that, with the appropriate database of studies, is capable of producing curves representative of any URM building typology subjected to a specified hazard. The curves are expressed in multiple forms to demonstrate capability of use in various loss-assessment applications. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000648