Use of Fiber-Reinforced Polymers in Highway Infrastructure (2017) / Chapter Skim
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Pages 123-136
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123 chapter eight State-of-Current-PraCtiCe Survey A survey questionnaire was disseminated to the state DOTs and Canadian Ministry of Transportation (provincial ministries) in cooperation with the AASHTO Subcommittee on Bridges and Structures (SCOBS)
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124 HiStoriCal aSPeCt of fiber-reinforCed Polymer ComPoSiteS in HigHway infraStruCture More than 80% of the respondents used FRP composites for their projects (38 agencies) , as shown in Figure 62(a)
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125 members (column and pier-cap, respectively) , and CFRP strengthening can be implemented for both members.
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126 More field-demonstration projects are necessary to actively promote FRP composites, including technology transfer in professional meetings, workshops, and conferences. During the telephone interviews, several agencies mentioned that technical training is necessary to better understand FRP materials and their applications in highway infrastructure.
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127 • FRP deck failure/delamination. • Lack of experience with fabrication, lack of standardization in the composites industry, and lack of inspection standards for composite.
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128 respondents were interested in the performance of structural members constructed with FRP composites (Figure 68)
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129 site is not well documented (a limited amount of information is available, as discussed in Chapter Five, State-of-the-Art of Fiber-Reinforced Polymer Composites in Highway Infrastructure.) Most agencies conducted visual inspections (88.0%)
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130 and assessed the costs of CFRP-prestressed concrete girders relative to those of conventional steelprestressed girders. Effort on life-cycle cost analysis appears insufficient to quantify the long-term benefit of FRP applications in highway infrastructure.
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131 • For one FRP bridge deck, we performed a full-scale load test to measure structural response of the structure. • IBRD research project.
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132 conventional repairs as well. FRP repairs in the state are gaining acceptance from designers and contractors.
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133 – The selection of consultants and contractors for projects involving FRP is done the same as it is for all projects. – Required that the FRP system supplier be present as the contractor's QC [quality control]
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134 prestressed bridge girders)
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135 • Unavailability of quality FRP deck products and existing installations with inadequate attachment and overlay details. • No appropriate candidates.
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136 • FRP strengthening: although premature FRP-debonding has not been reported, protective coatings may deteriorate. Regular inspection detects this nonstructural problem, and maintenance action may follow, depending on the extent of peeled coatings.
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