Bridge-in-a-Backpack™ task 6 : guidelines for long term inspection and maintenance.
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2016-01-01
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Abstract:This report includes fulfillment of Task 6 of a multi-task contract to further enhance concrete filled FRP tubes, or ; the Bridge in a Backpack. Task 6 provides guidelines for long term inspection and maintenance. ; This bridge consists of a buried arch system including structurally integrated stay-in-place concrete-filled fiber ; reinforced-polymer (FRP) tubes (CFFTs) as main structural members, an FRP or concrete deck, ; foundations, and headwalls holding back soil. The FRP composite tube, typically constructed of braided carbonglass ; material within a vinylester resin (VE-based GFRP), provides a stay-in-place form for the concrete and tensile ; reinforcement as a structurally integrated part of the arch composite section. As such, the durability and structural ; performance of the FRP composite tube and its bond with the concrete throughout the design life are critical to the ; overall system durability. The FRP tube is exposed to both the environment on the exterior, and the concrete on the ; interior, and these dual exposure durability requirements must be taken into account during design, and carefully ; monitored through inspection during service life to detect damage or degradation that could impact strength ; or serviceability.
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Main Document Checksum:urn:sha256:8c6591e8678361d5b608ae2ccfe356ce1443995b7b19cf8ac499e10bcc0562bb