Seismic performance of nonprestressed and prestressed HPC frames under low reversed cyclic loading / Weichen Xue in Journal of structural engineering, Vol. 137 N° 11 (Novembre 2011)  

Public ISBD [article]  inJournal of structural engineering > Vol. 137 N° 11 (Novembre 2011) . - pp. 1254-1262 Titre : Seismic performance of nonprestressed and prestressed HPC frames under low reversed cyclic loading Type de document : texte imprimé Auteurs : Weichen Xue, Auteur ; Bin Cheng, Auteur ; Renguang Zheng, Auteur Année de publication : 2012 Article en page(s) : pp. 1254-1262 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Seismic performance HPC frame Low reversed cyclic loading Prestressing Résumé : Previous studies primarily focused on the seismic performance of high-strength concrete (HSC) members and the static behavior of high-performance concrete (HPC) members. The work presented here aims at studying seismic performance of HPC frames under low reversed cyclic loading to provide guidance to support the design of HPC structures in seismic regions. Experimental studies are conducted to investigate failure patterns, failure mechanism, strains of longitudinal bars, P-Δ curves, characteristic loads, displacement-restoring capacity, displacement ductility coefficient, stiffness degradation, and the energy-dissipation capacity of two-bay, two-story HPC frames under low reversed cyclic loading. Studies indicate that both nonprestressed and prestressed HPC frames show good seismic performance during testing. The two HPC frames both fail in a partial beam sidesway mechanism. The hysteresis area of the nonprestressed frame is larger than that of the prestressed frame, whereas both frames still show relatively high energy-dissipation capacity. The applied prestressing in frame beams could enhance the displacement-restoring capacity of frames but decreases the energy dissipation. The prestressed frame exhibits a better ductile manner than the nonprestressed frame. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i11/p1254_s1?isAuthorized=no [article] Seismic performance of nonprestressed and prestressed HPC frames under low reversed cyclic loading [texte imprimé] / Weichen Xue, Auteur ; Bin Cheng, Auteur ; Renguang Zheng, Auteur . - 2012 . - pp. 1254-1262. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 11 (Novembre 2011) . - pp. 1254-1262 Mots-clés : Seismic performance HPC frame Low reversed cyclic loading Prestressing Résumé : Previous studies primarily focused on the seismic performance of high-strength concrete (HSC) members and the static behavior of high-performance concrete (HPC) members. The work presented here aims at studying seismic performance of HPC frames under low reversed cyclic loading to provide guidance to support the design of HPC structures in seismic regions. Experimental studies are conducted to investigate failure patterns, failure mechanism, strains of longitudinal bars, P-Δ curves, characteristic loads, displacement-restoring capacity, displacement ductility coefficient, stiffness degradation, and the energy-dissipation capacity of two-bay, two-story HPC frames under low reversed cyclic loading. Studies indicate that both nonprestressed and prestressed HPC frames show good seismic performance during testing. The two HPC frames both fail in a partial beam sidesway mechanism. The hysteresis area of the nonprestressed frame is larger than that of the prestressed frame, whereas both frames still show relatively high energy-dissipation capacity. The applied prestressing in frame beams could enhance the displacement-restoring capacity of frames but decreases the energy dissipation. The prestressed frame exhibits a better ductile manner than the nonprestressed frame. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i11/p1254_s1?isAuthorized=no

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