Fiber Reinforced Plastic Reinforcement(FRP Reinforcement) yog maj mam hloov cov tsoos steel reinforcement nyob rau hauv civil engineering vim nws lub teeb yuag, siab zog thiab corrosion-resistant zog. Txawm li cas los xij, nws cov kav ntev yog cuam tshuam los ntawm ntau yam ntawm ib puag ncig, thiab cov hauv qab no tseem ceeb thiab kev ntsuas yuav tsum tau xav txog:
1. Humidity thiab dej ib puag ncig
Kev cuam tshuam mechanism:
Cov dej noo nkag mus rau hauv lub substrate ua rau o thiab tsis muaj zog ntawm fiber-substrate interface daim ntawv cog lus.
Hydrolysis ntawm iav fibers (GFRP) tuaj yeem tshwm sim nrog qhov poob ntawm lub zog loj; carbon fibers (CFRP) tsis tshua muaj kev cuam tshuam.
Kev ntub dej thiab qhuav cycling accelerates microcrack expansion, ua rau delamination thiab debonding.
Kev tiv thaiv:
Xaiv cov hygroscopicity tsawg (xws li vinyl ester); txheej txheej los yog waterproofing kho.
Nyiam CFRP nyob rau hauv qhov chaw ntub dej ntev.
2. Kev kub ceev thiab cua sov caij tsheb kauj vab
Cov teebmeem kub kub:
Resin matrix softens (saum lub iav hloov pauv kub), ua rau txo qis thiab lub zog.
Kub kub ceev hydrolysis thiab oxidation cov tshuaj tiv thaiv (xws liAramid fiber ntauAFRP yog qhov cuam tshuam rau thermal degradation).
Cov teebmeem kub qis:
Matrix embrittlement, nquag mus rau micro-cracking.
Thermal cycling:
Qhov sib txawv ntawm coefficient ntawm thermal expansion ntawm fiber ntau thiab matrix ua rau tsub zuj zuj ntawm interfacial stresses thiab ua rau debonding.
Kev tiv thaiv:
Kev xaiv ntawm kub resistant resins (xws li bismaleimide); optimization ntawm fiber ntau / substrate thermal match.
3. Ultraviolet (UV) hluav taws xob
Kev cuam tshuam mechanism:
UV ua rau cov duab-oxidation cov tshuaj tiv thaiv ntawm cov resin, ua rau saum npoo chalking, embrittlement thiab nce micro-cracking.
Accelerates intrusion ntawm ya raws thiab tshuaj, ua rau synergistic degradation.
Kev tiv thaiv:
Ntxiv UV absorbers (xws li titanium dioxide); npog saum npoo nrog txheej tiv thaiv (xws li polyurethane txheej).
Kev tshuaj xyuas tsis tu ncuaFRP Cheebtsamnyob rau hauv ib puag ncig raug.
4. Tshuaj corrosion
Acid ib puag ncig:
Kev yaig ntawm cov qauv silicate hauv cov iav fibers (GFRP rhiab), ua rau fiber ntau tawg.
Alkaline ib puag ncig (piv txwv li cov kua dej hauv pob zeb):
cuam tshuam lub siloxane network ntawm GFRP fibers; resin matrix yuav saponify.
Cov pa roj carbon fiber ntau (CFRP) muaj qhov zoo alkali tsis kam thiab tsim nyog rau cov qauv pob zeb.
Ntsev tsuag ib puag ncig:
Chloride ion nkag mus nrawm nrawm interfacial corrosion thiab synergizes nrog cov av noo kom exacerbate degradation kev ua tau zoo.
Kev tiv thaiv:
Kev xaiv cov tshuaj tiv thaiv fibers (xws li CFRP); ntxiv cov tshuaj tiv thaiv corrosion rau cov matrix.
5. Lub voj voog khov-thaw
Kev cuam tshuam mechanism:
Cov dej noo nkag mus rau hauv microcracks khov thiab nthuav dav, nthuav qhov kev puas tsuaj; rov khov thiab thawing ua rau tawg ntawm matrix.
Kev tiv thaiv:
Tswj cov khoom nqus dej; siv cov hloov pauv hloov matrix kom txo qis kev puas tsuaj.
6. Lub sij hawm ntev loading thiab creep
Static load cuam tshuam:
Creep ntawm resin matrix ua rau muaj kev ntxhov siab redistribution thiab fibers raug rau siab loads, uas yuav ua rau puas.
AFRP creeps ho, CFRP muaj qhov zoo tshaj plaws creep resistance.
Dynamic loading:
Nkees loading accelerates microcrack expansion thiab txo qaug zog lub neej.
Kev tiv thaiv:
Tso cai rau kev nyab xeeb ntau dua hauv kev tsim; nyiam CFRP lossis siab modulus fibers.
7. Integrated ib puag ncig coupling
Cov xwm txheej tiag tiag hauv ntiaj teb (piv txwv li, ib puag ncig marine):
Cov av noo, ntsev tsuag, kub hloov pauv thiab cov khoom siv kho tshuab ua haujlwm ua ke kom ua rau lub neej luv luv.
Teb zoo:
Multi-factor accelerated aging sim soj ntsuam; tsim tseg ib puag ncig txo nqi.
Cov ntsiab lus thiab cov lus pom zoo
Kev xaiv cov khoom siv: Nyiam hom fiber ntau raws li ib puag ncig (xws li CFRP zoo tshuaj tiv thaiv, GFRP tus nqi qis tab sis xav tau kev tiv thaiv).
Kev tiv thaiv tsim: txheej txheej, sealing kev kho mob, optimized resin formulation.
Kev saib xyuas thiab kev saib xyuas: xyuas kom tsis tu ncua ntawm micro-cracks thiab kev ua haujlwm tsis zoo, kho raws sijhawm.
Lub durability ntawmFRP kev txhawb zogyuav tsum tau lees paub los ntawm kev sib xyaw ntawm cov khoom siv optimization, kev tsim qauv thiab kev ntsuas kev hloov pauv ib puag ncig, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig hnyav uas yuav tsum tau ua tib zoo xyuas kom zoo.
Post lub sij hawm: Apr-02-2025
