Doctoral Dissertations

Keywords and Phrases

Fiber reinforced polymer composites; Full-scale bridge testing; GFRP durability; Thermal analysis

Abstract

"The hybrid composite beam (HCB) consists of a self consolidating concrete (SCC) arch that is tied at the end by galvanized strands. The tied arch is encapsulated by a glass fiber reinforced polymer (GFRP) shell. A limited number of researches have studied the essential design methodologies and long-term performance of the HCB. The research presented in this dissertation aimed to more fundamentally understand the structural behavior of this new beam and evaluate its durability. This research study was conducted through four phases. A full-scale bridge load testing was conducted on a single-web HCB bridge during the first phase. The first finite element analysis of an HCB bridge superstructure was conducted. The areas that need more research and investigation were highlighted. In the second phase, double-web HCB Bridge was instrumented by various sensors. Strains induced in HCB's elements during several loading stages were collected. The existing flexural analysis method was unable to estimate accurately the induce strains. Analysis methods for a simply supported HCB and an HCB that is supported on bearing pads were proposed. These methods achieved significant enhancement in estimating the HCB's strains. The HCB's shell was subjected to five aging regimes during the third stage. The existing voids in the laminated shell made the fibers and the interphase regions prone to chemical and moisture attacks. However, the diffusion of the chemical solutions was always found to be confined to the first lamina. This result suggested that the composite shell is able to protect the strands from a moisture attack during the HCB's service life. The last stage clarified that the thermal stresses in an HCB bridge superstructure elements produced by thermal gradients are not critical and can be excluded from the design."--Abstract, page iv.

Advisor(s)

Myers, John

Committee Member(s)

ElGawady, Mohamed
Sneed, Lesley
Chandrashekhara, K.
Birman, V. (Victor)

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

Ph. D. in Civil Engineering

Sponsor(s)

Missouri. Department of Transportation
Missouri University of Science and Technology. National University Transportation Center

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2015

Journal article titles appearing in thesis/dissertation

  • Hybrid composite beam (HCB) bridge implementation and field monitoring
  • Finite-element modeling of hybrid composite beam bridges in Missouri
  • Analysis methods for single-web and multi-web hybrid composite beam (HCB) bridges
  • Durability of hybrid composite beam (HCB) bridges subjected to various environmental conditioning
  • Design of hybrid composite beam bridge superstructures for thermal gradient

Pagination

xviii, 348 pages

Note about bibliography

Includes bibliographic references.

Rights

© 2015 Mohamed Abdelkhalik Aboelseoud, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Fiber-reinforced concrete -- TestingFiber-reinforced concrete -- Mechanical propertiesConcrete beams -- Mechanical propertiesFinite element method -- Data processingComposite construction

Thesis Number

T 10702

Electronic OCLC #

913411955

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