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Flexural behavior of ultra-high performance concrete (UHPC) beams prestressed with hybrid tendons
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Ortiz, Daniel F.. Flexural behavior of ultra-high performance concrete (UHPC) beams prestressed with hybrid tendons. Retrieved from https://doi.org/doi:10.7282/t3-69mc-ww22

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TitleFlexural behavior of ultra-high performance concrete (UHPC) beams prestressed with hybrid tendons
NameOrtiz, Daniel F. (author); Nassif, Hani (chair); Abu-Obeidah, Adi (member); Lou, Peng (member); Rutgers University; School of Graduate Studies
Date Created2022
Other Date2022-05 (degree)
SubjectCivil engineering, CFRP, Hybrid beams, Serviceability, UHPC
Extent98 pages : illustrations
DescriptionUltra-high-performance concrete (UHPC) is increasingly receiving worldwide attention because of its advanced mechanical properties including high tensile properties, enlarged ductility, and excellent durability against chloride attacks. These improved mechanical properties have encouraged the use of UHPC in pre-stressed post-tensioned structural members especially when combined with non-metallic tendons. Combining non-material tendons and UHPC creates an innovative system capable of building longer durable bridge girders with a longer service life compared to the common post-tensioned system. Concrete and reinforcement deterioration, which commonly initiated by the penetration of chloride ions from deicing salts or grouts, can be avoided with the proposed system especially with the increases in live and superimposed dead loads. This study focuses on the serviceability performance of hybrid UHPC beams prestressed with a combination of bonded and unbonded steel and carbon fiber-reinforced polymer (CFRP) tendons and compares the prediction of ultimate stresses on bonded tendons, ultimate moment capacity, deflection, and crack widths with code standards and models available on the literature. Seven beams were tested to failure under third-point loading with emphasis on the tendon materials (i.e., CFRP and steel). Results showed that hybrid beams, using CFRP as the unbonded element, is a very robust prestressing system that may achieve extended service life due its corrosion resistance, while maintaining comparable service performance when compared to hybrid steel beams. Additionally, current code equations show to be very conservative in predicting the capacity and behavior of UHPC prestressed members.
NoteM.S.
NoteIncludes bibliographical references
Genretheses
Persistent URLhttps://doi.org/doi:10.7282/t3-69mc-ww22
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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