Documents disponibles écrits par cet auteur

Nonlinear response of two-way asymmetric single-story building under biaxial excitation / Andrea Lucchini in Journal of structural engineering, Vol. 137 N° 1 (Janvier 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 34-40 Titre : Nonlinear response of two-way asymmetric single-story building under biaxial excitation Type de document : texte imprimé Auteurs : Andrea Lucchini, Auteur ; Giorgio Monti, Auteur ; Sashi Kunnath, Auteur Année de publication : 2011 Article en page(s) : pp. 34-40 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Two-way  asymmetric  plan  Single  story  Biaxial  excitation  Nonlinear  torsional  response  Incremental  dynamic  analysis  Incidence  angle Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Findings from nonlinear dynamic analyses investigating the torsional response of a two-way asymmetric single-story building under biaxial excitations are reported. Ground motions of increasing intensities, characterized by varying angles of incidence, are used to show the evolution of the seismic behavior with the increase of the inelastic demand. Results of the numerical simulations indicate that the parameters governing the nonlinear response of the asymmetric-plan building are associated with the centers of resistances (CRs) of the system. These CRs correspond to the “base shear-torque” (BST) combinations producing the plastic mechanisms that provide in each direction the maximum lateral strength of the building. The location of such CRs can be evaluated through the analysis of the BST surface, that is, the BST interaction surface of all the different plastic mechanisms that can develop in the building. Comparisons of the obtained results with those from incremental dynamic analyses on systems characterized by different stiffness and resistance distributions are also shown. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i1/p34_s1?isAuthorized=no [article] Nonlinear response of two-way asymmetric single-story building under biaxial excitation [texte imprimé] / Andrea Lucchini, Auteur ; Giorgio Monti, Auteur ; Sashi Kunnath, Auteur . - 2011 . - pp. 34-40. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 34-40 Mots-clés : Two-way  asymmetric  plan  Single  story  Biaxial  excitation  Nonlinear  torsional  response  Incremental  dynamic  analysis  Incidence  angle Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Findings from nonlinear dynamic analyses investigating the torsional response of a two-way asymmetric single-story building under biaxial excitations are reported. Ground motions of increasing intensities, characterized by varying angles of incidence, are used to show the evolution of the seismic behavior with the increase of the inelastic demand. Results of the numerical simulations indicate that the parameters governing the nonlinear response of the asymmetric-plan building are associated with the centers of resistances (CRs) of the system. These CRs correspond to the “base shear-torque” (BST) combinations producing the plastic mechanisms that provide in each direction the maximum lateral strength of the building. The location of such CRs can be evaluated through the analysis of the BST surface, that is, the BST interaction surface of all the different plastic mechanisms that can develop in the building. Comparisons of the obtained results with those from incremental dynamic analyses on systems characterized by different stiffness and resistance distributions are also shown. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i1/p34_s1?isAuthorized=no

Seismic behavior of single-story asymmetric-plan buildings under uniaxial excitation / Andrea Lucchini in Earthquake engineering structural dynamics, Vol. 38 N° 9 (Juillet 2009) 

Public ISBD [article]  in Earthquake engineering structural dynamics > Vol. 38 N° 9 (Juillet 2009) . - pp. 1053-1070 Titre : Seismic behavior of single-story asymmetric-plan buildings under uniaxial excitation Type de document : texte imprimé Auteurs : Andrea Lucchini, Auteur ; Giorgio Monti, Auteur ; Sashi Kunnath, Auteur Article en page(s) : pp. 1053-1070 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Asymmetric-plan  building;  Single-story  frame;  Uniaxial  excitation;  Nonlinear  seismic  response;  Torsion Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The critical parameters that influence the nonlinear seismic response of asymmetric-plan buildings are identified by evaluating the effects of different asymmetries that may characterize the structure of a building as well as exploring the influence of the ground motion features. First, the main findings reported in the literature on both the linear and nonlinear dynamic response of asymmetric-plan buildings are presented. The common findings and the conflicting conclusions reached in different investigations are pointed out. Then, the results of comprehensive nonlinear dynamic analyses performed for evaluating the seismic response of systems characterized by different strength and stiffness configurations, representative of a large class of asymmetric-plan buildings, are reported. Findings from the study indicate that the building response changes when moving from the linear to the nonlinear range, so that the seismic behavior of asymmetric-plan buildings, apart from the source of asymmetry, can be always classified as irregular. Additionally, it was observed that as the seismic demands cause amplification of system nonlinearity with increasing earthquake intensity, the maximum displacement demand in the different resisting elements tends to be reached with the same deformed configuration of the system. The resultant of the seismic forces producing such a maximum demand is located at the center of resistance and corresponds to the collapse mechanism of the system that provides the maximum lateral strength in the exciting direction of the seismic action. ISSN : 0098-8847 En ligne : http://www3.interscience.wiley.com/journal/121574867/abstract [article] Seismic behavior of single-story asymmetric-plan buildings under uniaxial excitation [texte imprimé] / Andrea Lucchini, Auteur ; Giorgio Monti, Auteur ; Sashi Kunnath, Auteur . - pp. 1053-1070. Génie Civil Langues : Anglais (eng) in Earthquake engineering structural dynamics > Vol. 38 N° 9 (Juillet 2009) . - pp. 1053-1070 Mots-clés : Asymmetric-plan  building;  Single-story  frame;  Uniaxial  excitation;  Nonlinear  seismic  response;  Torsion Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The critical parameters that influence the nonlinear seismic response of asymmetric-plan buildings are identified by evaluating the effects of different asymmetries that may characterize the structure of a building as well as exploring the influence of the ground motion features. First, the main findings reported in the literature on both the linear and nonlinear dynamic response of asymmetric-plan buildings are presented. The common findings and the conflicting conclusions reached in different investigations are pointed out. Then, the results of comprehensive nonlinear dynamic analyses performed for evaluating the seismic response of systems characterized by different strength and stiffness configurations, representative of a large class of asymmetric-plan buildings, are reported. Findings from the study indicate that the building response changes when moving from the linear to the nonlinear range, so that the seismic behavior of asymmetric-plan buildings, apart from the source of asymmetry, can be always classified as irregular. Additionally, it was observed that as the seismic demands cause amplification of system nonlinearity with increasing earthquake intensity, the maximum displacement demand in the different resisting elements tends to be reached with the same deformed configuration of the system. The resultant of the seismic forces producing such a maximum demand is located at the center of resistance and corresponds to the collapse mechanism of the system that provides the maximum lateral strength in the exciting direction of the seismic action. ISSN : 0098-8847 En ligne : http://www3.interscience.wiley.com/journal/121574867/abstract

Theoretical model and computational procedure to evaluate the NSM FRP strips shear strength contribution to a RC beam / Vincenzo Bianco in Journal of structural engineering, Vol. 137 N° 11 (Novembre 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 11 (Novembre 2011) . - pp. 1359-1372 Titre : Theoretical model and computational procedure to evaluate the NSM FRP strips shear strength contribution to a RC beam Type de document : texte imprimé Auteurs : Vincenzo Bianco, Auteur ; Giorgio Monti, Auteur ; J. A. O. Barros, Auteur Année de publication : 2012 Article en page(s) : pp. 1359-1372 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : FRP  NSM  Computational  procedure  Shear  strengthening  Concrete  fracture  Debonding  Tensile  rupture Résumé : This paper presents a computational procedure to evaluate the shear strength contribution provided to a reinforced concrete (RC) beam by a system of near-surface mounted (NSM) fiber reinforced polymer (FRP) strips. This procedure is based on the evaluation of (1) the constitutive law of the average-available bond-length NSM FRP strip effectively crossing the shear crack, and (2) the maximum effective capacity it can attain during the loading process of the strengthened beam. Because of complex phenomena such as (1) interaction between forces transferred through bond to the surrounding concrete and the concrete fracture, and (2) interaction among adjacent strips, the NSM FRP strip constitutive law is largely different than the linear elastic one characterizing the FRP behavior in tension. Once the constitutive law of the average-available bond-length NSM strip is reliably known, its maximum effective capacity can be determined by imposing a coherent kinematic mechanism. The self-contained and ready-to-implement set of analytical equations and logical operations is presented along with the main underlying physical-mechanical principles and assumptions. The formulation proposed is appraised against some of the most recent experimental results, and its predictions are also compared with those obtained by a recently developed more sophisticated model. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i11/p1359_s1?isAuthorized=no [article] Theoretical model and computational procedure to evaluate the NSM FRP strips shear strength contribution to a RC beam [texte imprimé] / Vincenzo Bianco, Auteur ; Giorgio Monti, Auteur ; J. A. O. Barros, Auteur . - 2012 . - pp. 1359-1372. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 11 (Novembre 2011) . - pp. 1359-1372 Mots-clés : FRP  NSM  Computational  procedure  Shear  strengthening  Concrete  fracture  Debonding  Tensile  rupture Résumé : This paper presents a computational procedure to evaluate the shear strength contribution provided to a reinforced concrete (RC) beam by a system of near-surface mounted (NSM) fiber reinforced polymer (FRP) strips. This procedure is based on the evaluation of (1) the constitutive law of the average-available bond-length NSM FRP strip effectively crossing the shear crack, and (2) the maximum effective capacity it can attain during the loading process of the strengthened beam. Because of complex phenomena such as (1) interaction between forces transferred through bond to the surrounding concrete and the concrete fracture, and (2) interaction among adjacent strips, the NSM FRP strip constitutive law is largely different than the linear elastic one characterizing the FRP behavior in tension. Once the constitutive law of the average-available bond-length NSM strip is reliably known, its maximum effective capacity can be determined by imposing a coherent kinematic mechanism. The self-contained and ready-to-implement set of analytical equations and logical operations is presented along with the main underlying physical-mechanical principles and assumptions. The formulation proposed is appraised against some of the most recent experimental results, and its predictions are also compared with those obtained by a recently developed more sophisticated model. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i11/p1359_s1?isAuthorized=no