High-Strength Reinforcing Bars (HSRB) and TMS 402: A First Study on Grade 80 (550 MPa) Bars

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dc.contributor.advisorKalliontzis, Dimitrios
dc.contributor.committeeMemberBelarbi, Abdeldjelil
dc.contributor.committeeMemberMo, Yi-Lung
dc.contributor.committeeMemberBaxevanis, Theocharis
dc.creatorKhalid, Omar Nazar Abdulhamid
dc.creator.orcid0009-0004-8003-9390
dc.date.accessioned2024-01-27T17:13:28Z
dc.date.createdDecember 2023
dc.date.issued2023-12
dc.date.updated2024-01-27T17:13:28Z
dc.description.abstractIn 2019, ACI 318 introduced a major code change by incorporating the usage and applications of high strength steel reinforcing bars (HSRBs). The adoption of HSRBs was motivated by several factors, including the reduction in steel congestion and construction cost, gain in member strength, and reduction in the carbon footprint of reinforced concrete buildings. However, code adoption of HSRBs has lagged in masonry design, which is attributed to the absence of relevant analytical and experimental data. Currently, TMS 402/602 defines the maximum allowable design stress for reinforcing bars at 60,000 psi. This research presents the first study on using Grade 80 (550 MPa) bars in the context of TMS 402/602. An analytical investigation was performed to examine the feasibility of using these bars with consideration to the ASD/SD provisions and the potential for reduction in material weight and cost in comparison with Grade 60 bars. The analytical investigation was followed by an experimental study of lap-splice tests for Grade 80 ASTM A615 and ASTM A706 reinforcing deformed bars. The experimental program included twenty-two contact lap-splice experiments in concrete and clay brick masonry, with test variables being the bar size, the lap-splice length, and the ASTM designation of the bars. Experimental and analytical results corroborated the technical feasibility of embedding Grade 80 bars in structural masonry with reasonable lap-splice lengths, following revisions to the design formulas of TMS 402/602. The need for future research is emphasized toward testing of large-scale masonry members reinforced with Grade 80 bars in flexure and shear.
dc.description.departmentCivil and Environmental Engineering, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.citationPortions of this document appear in: Khalida, Omar, Waleed Khanb, Dimitrios Kalliontzisb, and John Hochwaltb. "Experimental Study for the Bond Development of High-Strength Steel Reinforcement in Structural Masonry." Lateral 996 (2023): A1035; and in: Kalliontzis, D., Khalid, O., and Khan, M. W. (2023). “Creating a Road Map to Code Adoption of High-Strength Steel in Clay Masonry - Grade 80 Bars,” Report No. WSCPA-5-25-2023, Department of Civil and Environmental Engineering, Cullen College of Engineering, University of Houston.
dc.identifier.urihttps://hdl.handle.net/10657/16229
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjecthigh-strength steel reinforcement
dc.subjectstructural masonry
dc.subjectlap-splice length
dc.subjectGrade 80 steel
dc.subjectTMS 402/602, ACI 318.
dc.titleHigh-Strength Reinforcing Bars (HSRB) and TMS 402: A First Study on Grade 80 (550 MPa) Bars
dc.type.dcmitext
dc.type.genreThesis
dcterms.accessRightsThe full text of this item is not available at this time because the student has placed this item under an embargo for a period of time. The Libraries are not authorized to provide a copy of this work during the embargo period.
local.embargo.lift2025-12-01
local.embargo.terms2025-12-01
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentCivil and Environmental Engineering, Department of
thesis.degree.disciplineCivil Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science in Civil Engineering

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