Performance of an AASHTO Beam Bridge Prestressed with CFRP Tendons

Autor:	Vasant Matsagar, Elin Jensen, Prasadu Penjendra, Nabil F. Grace
Rok vydání:	2013
Předmět:	Materials science business.industry Progressive collapse Building and Construction Structural engineering Fibre-reinforced plastic Flange law.invention Beam bridge Prestressed concrete Flexural strength law Precast concrete business Beam (structure) Civil and Structural Engineering
Zdroj:	Journal of Bridge Engineering. 18:110-121
ISSN:	1943-5592 1084-0702
DOI:	10.1061/(asce)be.1943-5592.0000339
Popis:	Corrosion-induced deterioration of steel RC highway bridges is one of the major distress types that can render a structurally deficient bridge before reaching the design life. One feasible solution to the problem is to replace the conventional steel reinforcement with noncorrosive carbon fiberereinforcedpolymer(CFRP)reinforcements.However,theCFRPreinforcementasaninternalreinforcementhasnotbeenexploredin AASHTO-typeprestressedconcretebeam bridges.AASHTO-type beamshavean I-type cross sectionwitha bottom flange, andonintegrationof thedeckslab,the finalshapeisabulb-Tsection.ThispaperdiscussestheexperimentalinvestigationofaprecastprestressedAASHTOcontrolbeam and a bridge model. A 12.5-m-long one-third scale AASHTO-type control beam was experimentally investigated for its flexural behavior when reinforcedand prestressed withCFRP. Subsequently,a one-thirdscalebridge model made of fivesuchbeamswasconstructed,instrumented,and testedunderbothserviceandultimateloadconditions.Asanticipated,thecontrolbeamandthebridgemodelfailureswereinitiatedbyrupturingof the prestressing CFRP tendons at the bottom layer. The observed flexural response of the bridge model was in close agreement with that of the controlbeam.Asexpected,thefailuremodewasprogressive,withextensivecrackingofthebridgemodel,whichgivessignificantwarningpriorto the ultimate collapse, overcoming issues related to the otherwise brittle behavior of the CFRP-reinforced structures. It is therefore highly recommendedtoprovidetheCFRPtendonsindifferentlayersalongthedepthofthebeamstoeffectivelyaddresstheissuesrelatedtobrittlefailure exhibited by CFRP reinforcements. DOI: 10.1061/(ASCE)BE.1943-5592.0000339. © 2013 American Society of Civil Engineers. CE Database subject headings: Beams; Bridges; Fiber reinforced polymer; Prestressed concrete; Progressive collapse. Author keywords: AASHTO beam; Bridge; CFRP; Ductility; Prestressed concrete; Progressive failure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::624d7fe346a2c3cecb2c07a30907909d https://doi.org/10.1061/(asce)be.1943-5592.0000339 Zobrazit plný text záznamu