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Transverse joint details with tight bend diameter U-bars for accelerated bridge construction / Zhongguo John Ma in Journal of structural engineering, Vol. 138 N° 6 (Juin 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 697–707 Titre : Transverse joint details with tight bend diameter U-bars for accelerated bridge construction Type de document : texte imprimé Auteurs : Zhongguo John Ma, Auteur ; Samuel Lewis, Auteur ; Qi Cao, Auteur Année de publication : 2012 Article en page(s) : pp. 697–707 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Transverse  joint  Bend  diameter  Precast  system  Deformed  wire  reinforcement  Overlap  length  Strut-and-tie  model  (STM)  Accelerated  construction Résumé : This paper focuses on an investigation of transverse joint details with tight bend diameter U-bars for accelerated bridge construction. It presents the testing results of potential alternate reinforcing materials and joint details in two phases. Headed bar and U-bar [stainless steel and deformed wire reinforcement (DWR)] specimens with the same joint detail configuration were tested and compared in Phase I, followed by testing of U-bars (DWR) with varied concrete strength, bar spacing, and overlap length in Phase II. Test results were evaluated based on tension capacity, cracking at service loading and failure, and steel strain. A strut-and-tie model is proposed to predict the tension capacity of a transverse joint, which is capable of identifying the most critical parameters and yields safe and consistent predictions. Based on the experimental results, a No. 5 U-bar joint detail with no less than 152 mm (6 in.) overlap length and No. 4 lacer bars was recommended. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000518 [article] Transverse joint details with tight bend diameter U-bars for accelerated bridge construction [texte imprimé] / Zhongguo John Ma, Auteur ; Samuel Lewis, Auteur ; Qi Cao, Auteur . - 2012 . - pp. 697–707. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 697–707 Mots-clés : Transverse  joint  Bend  diameter  Precast  system  Deformed  wire  reinforcement  Overlap  length  Strut-and-tie  model  (STM)  Accelerated  construction Résumé : This paper focuses on an investigation of transverse joint details with tight bend diameter U-bars for accelerated bridge construction. It presents the testing results of potential alternate reinforcing materials and joint details in two phases. Headed bar and U-bar [stainless steel and deformed wire reinforcement (DWR)] specimens with the same joint detail configuration were tested and compared in Phase I, followed by testing of U-bars (DWR) with varied concrete strength, bar spacing, and overlap length in Phase II. Test results were evaluated based on tension capacity, cracking at service loading and failure, and steel strain. A strut-and-tie model is proposed to predict the tension capacity of a transverse joint, which is capable of identifying the most critical parameters and yields safe and consistent predictions. Based on the experimental results, a No. 5 U-bar joint detail with no less than 152 mm (6 in.) overlap length and No. 4 lacer bars was recommended. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000518