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Reliability-based durability assessment of GFRP bars for reinforced concrete

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dc.contributor.authorJackson, Nicole Danielleen
dc.contributor.committeechairCase, Scott W.en
dc.contributor.committeememberRoberts-Wollmann, Carin L.en
dc.contributor.committeememberLesko, John J.en
dc.contributor.departmentEngineering Science and Mechanicsen
dc.date.accessioned2014-03-14T20:48:23Zen
dc.date.adate2008-04-01en
dc.date.available2014-03-14T20:48:23Zen
dc.date.issued2007-11-12en
dc.date.rdate2010-12-22en
dc.date.sdate2007-11-26en
dc.description.abstractThe American Concrete Institute (ACI) has developed guidelines for the design of fiber reinforced polymer (FRP) reinforced concrete structures. Current guidelines require the application of environmental and flexural strength reduction factors, which have minimal experimental validation. Our goal in this research is the development of a Monte Carlo simulation to assess the durability of glass fiber reinforced polymer (GFRP) reinforced concrete designed for flexure. The results of this simulation can be used to determine appropriate flexural strength reduction factors. Prior to conducting the simulation, long-term GFRP tensile strength values needed to be ascertained. Existing FRP tensile strength models are limited to short-term predictions. This study successfully developed a power law based-FRP tensile strength retention model using currently available tensile strength data for GFRP exposed to variable temperatures and relative humidity. GFRP tensile strength retention results are projected at 0, 1, 3, 10, 30, and 60-year intervals. The Monte Carlo simulation technique is then used to assess the influence beam geometry, concrete strength, fractions of balanced reinforcement ratio, reinforcing bar tensile strength, and environmental reduction factors on the flexural capacity of GFRP reinforced concrete beams. Reliability analysis was successfully used to determine an environmental reduction factor of 0.5 for concrete exposed to earth and weather. For simulations with higher GFRP bar tensile strength as well as larger beam geometry and fractions of the balanced reinforcement ratio, larger moment capacities were produced. A strength reduction factor of approximately 0.8 is calculated for all fractions of balanced reinforcement ratio. The inclusion of more long-term moisture data for GFRP is necessary to develop a more cohesive tensile strength retention model. It is also recommended that longer life cycles of the GFRP reinforced concrete beams be simulated. This research was conducted thanks to support from the National Science Foundation Division of Graduate Education's Interdisciplinary Graduate Education Research and Traineeship (Award # DGE-0114342) Note: The opinions expressed herein are the views of the authors and should not be interpreted as the views of the National Science Foundation.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-11262007-155938en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11262007-155938/en
dc.identifier.urihttp://hdl.handle.net/10919/35825en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartndjackso.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectReliabilityen
dc.subjectConcreteen
dc.subjectMonte Carloen
dc.subjectGlass fiber reinforced polymer (GFRP)en
dc.titleReliability-based durability assessment of GFRP bars for reinforced concreteen
dc.typeThesisen
thesis.degree.disciplineEngineering Science and Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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