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Experimental Investigation of Structural Performance of CLT-UHPC Composite Structures

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dc.contributorKreger, Michael E.
dc.contributorDao, Thang
dc.contributorBhardwaj, Saahastaranshu
dc.contributorPatiballa, Sreekalyan
dc.contributor.advisorAaleti, Sriram
dc.contributor.authorPoudel, Bipul
dc.date.accessioned2026-02-09T22:56:34Z
dc.date.available2026-02-09T22:56:34Z
dc.date.issued2025
dc.descriptionElectronic Thesis or Dissertationen_US
dc.description.abstractBridges in the United States are largely in fair condition and nearing the end of their design life. Despite targeted initiatives to replace aging bridges, the rate of replacement remains slow. Recent research has explored improved construction materials and methods to accelerate the replacement and retrofitting of existing structures. Much of this work has focused on precast concrete, where questions regarding sustainability and environmentally friendly construction remain unresolved.This research aims to provide a sustainable alternative for rapidly replacing aging bridge decks by utilizing a mass-timber product--cross-laminated timber (CLT). However, CLT alone is unsuitable for this application due to its inherent limitations. As a natural, hygroscopic material, it has lower stiffness and strength compared to conventional concrete. To overcome these limitations, CLT is combined with an ultra-high-performance concrete (UHPC) overlay to form a CLT-UHPC composite, thereby enhancing durability, strength, and stiffness.The dissertation focuses on several key aspects. First, methods for effectively combining CLT and UHPC into a composite system are investigated, along with alternatives for controlling moisture intrusion in timber. A preliminary study on small-scale specimens evaluates the interface shear strength and bending strength of the composite system. Next, reduced-scale bridge decks are constructed and experimentally tested to assess performance under serviceability and ultimate strength conditions. The fatigue performance of joint connections is also examined. Finally, beyond bridge applications, the potential use of CLT-UHPC composites in tornado shelter walls is experimentally evaluated.en_US
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.other1206414
dc.identifier.urihttps://ir.ua.edu/handle/123456789/17636
dc.languageEnglish
dc.language.isoen_US
dc.publisherUniversity of Alabama Libraries
dc.relation.hasversionborn digital
dc.relation.ispartofThe University of Alabama Electronic Theses and Dissertations
dc.relation.ispartofThe University of Alabama Libraries Digital Collections
dc.rightsAll rights reserved by the author unless otherwise indicated.en_US
dc.subjectCross-laminated timber
dc.subjectUltra-high-performance concrete
dc.titleExperimental Investigation of Structural Performance of CLT-UHPC Composite Structuresen_US
dc.typethesis
dc.typetext
etdms.degree.departmentUniversity of Alabama. Department of Civil, Construction, and Environmental Engineering
etdms.degree.disciplineCivil engineering
etdms.degree.grantorThe University of Alabama
etdms.degree.leveldoctoral
etdms.degree.namePh.D.

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