Chikoka cha Zachilengedwe Pakukhazikika kwa Fiber Reinforced Plastic Reinforcement (FRP) Bars

Fiber Kulimbitsa Pulasitiki Reinforcement(FRP Reinforcement) pang'onopang'ono ikusintha zitsulo zamakhalidwe abwino mu engineering ya Civil engineering chifukwa cha kupepuka kwake, mphamvu zake zazikulu komanso zolimbana ndi dzimbiri. Komabe, kulimba kwake kumakhudzidwa ndi zinthu zosiyanasiyana zachilengedwe, ndipo zotsatirazi ndi zotsutsana nazo ziyenera kuganiziridwa:

1. Chinyezi ndi madzi chilengedwe

Chikoka makina:

Chinyezi chimalowa mu gawo lapansi ndikupangitsa kutupa ndi kufooketsa mgwirizano wa fiber-substrate.

Hydrolysis of glass fibers (GFRP) ikhoza kuchitika ndi kutaya kwakukulu kwa mphamvu; ulusi wa kaboni (CFRP) umakhudzidwa pang'ono.

Kuyenda panjinga konyowa komanso kowuma kumafulumizitsa kukula kwa microcrack, kumayambitsa delamination ndi debonding.

Njira zodzitetezera:

Sankhani utomoni wochepa wa hygroscopicity (mwachitsanzo vinilu ester); pamwamba ❖ kuyanika kapena madzi mankhwala.

Kondani CFRP m'malo achinyezi anthawi yayitali.

2. Kutentha ndi Kuthamanga kwa Matenthedwe

Kutentha kwakukulu:

Matrix a utomoni amafewetsa (pamwamba pa kutentha kwa kusintha kwa galasi), zomwe zimapangitsa kuchepa kwa kuuma ndi mphamvu.

Kutentha kwakukulu kumathandizira hydrolysis ndi makutidwe ndi okosijeni (mwachitsanzoAramid fiberAFRP imatha kuwonongeka chifukwa cha kutentha).

Kutsika kwa kutentha:

Matrix embrittlement, sachedwa kung'ambika kwa micro.

Kutentha panjinga:

Kusiyanasiyana kwa coefficient of thermal expolation pakati pa fiber ndi matrix kumabweretsa kuchulukira kwa kupsinjika kwamawonekedwe ndikuyambitsa kulumikizana.

Njira zodzitetezera:

Kusankha utomoni wosamva kutentha kwambiri (monga bismaleimide); kukhathamiritsa kwa fiber / gawo lapansi matenthedwe matenthedwe.

3. Ma radiation a Ultraviolet (UV).

Chikoka makina:

UV imayambitsa kachitidwe ka okosijeni wa utomoni, zomwe zimapangitsa kuti utomoni ukhale wokongoletsedwa, kung'ambika komanso kung'amba pang'ono.

Imathandizira kulowerera kwa chinyezi ndi mankhwala, zomwe zimayambitsa kuwonongeka kwa synergistic.

Njira zodzitetezera:

Kuonjezera UV absorbers (mwachitsanzo titaniyamu woipa); kuphimba pamwamba ndi wosanjikiza zoteteza (mwachitsanzo polyurethane zokutira).

Muziyendera nthawi zonseZithunzi za FRPm'malo owonekera.

4. Kuwonongeka kwa mankhwala

Malo a Acid:

Kukokoloka kwa kapangidwe ka silicate mu ulusi wagalasi (GFRP sensitive), zomwe zimapangitsa kuti fiber iwonongeke.

Malo okhala ndi zamchere (monga madzi a pore konkriti):

Amasokoneza maukonde a siloxane a ulusi wa GFRP; utomoni matrix akhoza saponify.

Mpweya wa Carbon (CFRP) uli ndi kukana kwambiri kwa alkali ndipo ndiwoyenera kupangira konkriti.

Malo opopera mchere:

Kulowa kwa chloride ion kumathandizira kuti zimbiri ziwonekere komanso kulumikizana ndi chinyezi kuti ziwonjezere kuwonongeka kwa magwiridwe antchito.

Njira zodzitetezera:

Kusankha ulusi wosamva mankhwala (mwachitsanzo, CFRP); kuwonjezera ma fillers olimbana ndi dzimbiri ku matrix.

5. Kuzizira kozizira

Chikoka makina:

Chinyezi cholowa mu microcracks chimaundana ndikukula, kukulitsa kuwonongeka; kuzizira mobwerezabwereza ndi kusungunuka kumabweretsa kusweka kwa masanjidwewo.

Njira zodzitetezera:

Kuwongolera mayamwidwe azinthu zamadzi; gwiritsani ntchito flexible resin matrix kuti muchepetse kuwonongeka kowonongeka.

6. Kutenga nthawi yayitali ndikukwawa

Zotsatira zolemetsa:

Kutsika kwa matrix a utomoni kumabweretsa kugawanikanso kwa nkhawa ndipo ulusi umakhala wolemetsa kwambiri, womwe ungayambitse kusweka.

AFRP imakwawa kwambiri, CFRP ili ndi kukana kwabwino kwambiri.

Kutsegula kwamphamvu:

Kutopa kumakulitsa kukula kwa microcrack ndikuchepetsa moyo wotopa.

Njira zodzitetezera:

Lolani kuti pakhale chitetezo chapamwamba pamapangidwe; amakonda CFRP kapena ulusi wapamwamba wa modulus.

7. Integrated chilengedwe kugwirizana

Zochitika zenizeni padziko lapansi (monga madera apanyanja):

Chinyezi, kupopera mchere, kusinthasintha kwa kutentha ndi katundu wamakina zimagwira ntchito mogwirizana kuti zifupikitse moyo.

Njira yoyankhira:

Multi-factor imathandizira okalamba kuyesa kuyesa; design reserve chilengedwe kuchotsera factor.

Chidule ndi Malangizo

Kusankha kwazinthu: Mtundu wokonda CHIKWANGWANI molingana ndi chilengedwe (mwachitsanzo CFRP kukana kwamankhwala abwino, GFRP yotsika mtengo koma ikufunika chitetezo).

Mapangidwe achitetezo: zokutira pamwamba, kusindikiza chithandizo, kukhathamiritsa kwa utomoni.

Kuyang'anira ndi kukonza: kuzindikira pafupipafupi ming'alu yaying'ono ndi kuwonongeka kwa magwiridwe antchito, kukonza munthawi yake.

Kukhazikika kwaKusintha kwa FRPziyenera kutsimikiziridwa ndi kuphatikiza kwa kukhathamiritsa kwa zinthu, mapangidwe apangidwe ndi kuwunika kusinthasintha kwa chilengedwe, makamaka m'malo ovuta omwe ntchito yayitali iyenera kutsimikiziridwa mosamala.