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Browsing by Author "Dang, C.N."

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Browsing by Author "Dang, C.N."

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    A New Smoothing Technique for Transfer-Length Determination 
    Ramirez-Garcia, Alberto T.; Dang, C.N.; Deschenes, R.A.; Hale, W. M.; Martí Vargas, José Rocío (American Concrete Institute, 2018)
    [EN] Transfer length is a significant parameter in the design of pretensioned concrete members. This study reports the measured transfer length of 15.2 mm (0.6 in.) prestressing strands. Twenty-four pretensioned concrete ...
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    Bond model of 15.2 mm strand with consideration of concrete creep and shrinkage 
    Kareem, R.S.; Al-Mohammedi, A.; Dang, C.N.; Martí Vargas, José Rocío; Hale, W.M. (Thomas Telford Ltd., 2020-08)
    [EN] The bond between prestressing strands and concrete in the transfer zone of pretensioned concrete members is a complicated mechanism. Concrete creep and shrinkage are dominant time-dependent factors that affect the ...
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    Measured Transfer Lengths of 0.7 in. (17.8 mm) Strands for Pretensioned Beams 
    Dang, C.N.; Floyd, R.W.; Hale, W. M; Martí Vargas, José Rocío (American Concrete Institute, 2016-01)
    [EN] The use of 0.7 in. (17.8 mm), Grade 270 (1860) prestressing strands has advantages over 0.5 and 0.6 in. (12.7 and 15.22 mm) strands. This study provides design guidelines for estimating transfer length of 0.7 in. (17.8 ...
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    Quantification of bond performance of 18-mm prestressing steel 
    Dang, C.N.; Hale, W. M.; Martí Vargas, José Rocío (Elsevier, 2018)
    [EN] The use of 18-mm prestressing strands has extensive advantages in building and bridge construction. Strand bond is a critical factor that constitutes the strand behavior in pretensioned concrete girders and directly ...
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    Spacing requirements of 0.7 in. (18 mm) diameter prestressing strands 
    Dang, C.N.; Floyd, R.W.; Hale, W.M.; Martí Vargas, José Rocío (2016)
    [EN] The use of 0.7 in. (18 mm) diameter strands for pretensioned concrete girders is advantageous when increasing the flexural capacity and extending girder spans. The current codes have no design guidelines for predicting ...
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    Temperature Gradients in Bridge Concrete I-Girders under Heat Wave 
    Hagedorn, R.; Martí Vargas, José Rocío; Dang, C.N.; Hale, W.M.; Floyd, R.W. (American Society of Civil Engineers, 2019-08-01)
    [EN] This paper presents an experimental research work to determine temperature gradients in concrete bridge girders under natural environmental conditions. Three AASHTO Type I-girders having different configurations (with ...