Performance of Multi-Hazard-Resistant Hollow-Core FRP-Concrete-Steel Columns with High-Strength SCC or UHPC

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dc.contributor.advisorVolz, Jeffery S.
dc.contributor.authorMilner, Jackson C.
dc.contributor.committeeMemberFloyd, Royce W.
dc.contributor.committeeMemberVemuganti, Shreya
dc.date.accessioned2023-12-12T23:02:12Z
dc.date.available2023-12-12T23:02:12Z
dc.date.issued2023-12-15
dc.date.manuscript2023-12-01
dc.description.abstractThe Federal Highway Administration (FHWA) and state departments of transportation (DOTs) are actively promoting accelerated bridge construction (ABC) to minimize construction costs by reducing construction time, which in turn enhances work-zone safety and reduces the impact on facility users. HC-FCS columns have the potential to combine the benefits of other alternatives including significant concrete confinement, improved axial and flexural strength, and enhanced ductility and energy absorption. HC-FCS columns consist of a concrete core sandwiched between an outer fiber-reinforced polymer (FRP) tube and an inner steel tube. The FRP and steel tubes function as stay-in-place forms, with the FRP providing corrosion resistance and the steel tube providing column reinforcement and reducing congested connections. Furthermore, the concrete core provides local buckling resistance to the FRP and steel tubes. The benefits of HC-FCS columns with high-strength self-consolidating concrete (HS-SCC) or ultra-high-performance concrete (UHPC), when compared to traditional reinforced concrete (RC) columns, are unknown but will likely further reduce construction time, increase strength and ductility, and allow for thinner, lighter columns. The main objective of this research project was to determine the improved column axial and flexural strength, ductility, and overall performance provided by HC-FCS columns when compared to traditional RC columns and to determine the benefits, or potential tradeoffs, of using HS-SCC and UHPC for the concrete core. Five half-scale column specimens were designed and constructed following AASHTO and ACI guidelines, and recommendations from previous research studies. The column specimens consisted of one RC column, two HC-FCS columns with HS-SCC used for the concrete core, and two HC-FCS columns with UHPC used for the concrete core. The specimens were subjected to displacement-controlled, cyclic lateral loading under a constant axial compressive load. The testing results of the column specimens, including the lateral load versus displacement at the column head, the peak flexural capacities, and the strain gauge data were analyzed and compared between HC-FCS column types and against the RC control column. HC-FCS columns demonstrated increased peak flexural capacity, ductility, and durability, with the UHPC cores demonstrating superior properties and performance compared to the HS-SCC cores.en_US
dc.identifier.urihttps://hdl.handle.net/11244/340043
dc.languageen_USen_US
dc.subjecthollow-core columnsen_US
dc.subjectaccelerated bridge constructionen_US
dc.subjectultra-high performance concreteen_US
dc.subjectflexural strengthen_US
dc.thesis.degreeMaster of Scienceen_US
dc.titlePerformance of Multi-Hazard-Resistant Hollow-Core FRP-Concrete-Steel Columns with High-Strength SCC or UHPCen_US
ou.groupGallogly College of Engineering::School of Civil Engineering and Environmental Scienceen_US
shareok.nativefileaccessrestricteden_US
shareok.orcid0009-0003-0307-4072en_US

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