xov xwm

Cov khoom siv sib xyaw ua los ntawm cov iav fiber-reinforced polymer (GFRP)yog tus qauv hauv kev tsim kho vim tias lawv muaj qhov sib piv ntawm lub zog thiab qhov hnyav, tsis xeb, thiab muaj peev xwm ua tau ntau yam.

Ua ntej tshaj, GFRP feem ntau siv rau hauv kev tsim kho tiag tiag los tsim cov khoom txhawb nqa tseem ceeb xws li cov ntoo thiab cov kem, thiab cov vaj huam sib luag hauv pem teb. Kev siv cov qauv iav fiber ntau-axial ua ke nrog cov resins uas tiv taus huab cua tso cai rau GFRP cov khoom kom xa cov zog tensile thiab khoov zoo heev. Piv txwv li, cov ntoo txhawb nqa nrog GFRP tuaj yeem txo qhov ntev ntawm qhov seem thaum tswj hwm lub peev xwm thauj khoom, yog li ua rau muaj qhov chaw sab hauv siv tau ntau dua. Hauv cov qauv hauv pem teb, cov khoom zoo heev ntawm GFRP daim ntawv tuaj yeem txhim kho qhov ruaj khov ntawm cov qauv, txo qhov nruab nrab ntawm qhov deflection, thiab ntev lub neej kev pabcuam.

Qhov thib ob, hauv kev lag luam kev tsim kho, GFRP maj mam hloov cov hlau txhawb nqa ib txwm muaj los txhim kho kev ruaj khov thiab kev tiv thaiv xeb. Cov hlau txhawb nqa ib txwm muaj yooj yim xeb hauv cov av noo, tshuaj tsuag ntsev, lossis cov chaw tshuaj lom neeg, thaum GFRP ua rau muaj kev tiv thaiv xeb zoo heev. Kev sim qhia tau tias txawm tias nyob rau hauv cov chaw muaj ntsev ntau,GFRPkhaws cia ntau tshaj 90% ntawm nws lub zog tom qab 1000 teev ntawm kev sim xeb sai. Qhov no ua rau GFRP yog cov khoom siv tseem ceeb hauv cov choj ntug dej hiav txwv, chaw nres nkoj, thiab cov nroj tsuag kev lag luam. Ntxiv mus, GFRP tus coefficient ntawm thermal expansion yog ze rau ntawm cov pob zeb ua vaj tse, tiv thaiv kev ntxhov siab vim qhov kub thiab txias hloov pauv thiab ntev lub neej tag nrho ntawm cov qauv pob zeb ua vaj tse.

Cov khoom GFRP kuj tseem siv tau rau hauv cov chaw muaj kuab paug heev, xws li cov hauv paus ntawm cov thoob dej hauv cov chaw tsim tshuaj, cov hauv paus ntawm cov chaw ua haujlwm hauv dej hiav txwv, thiab phab ntsa ntawm cov pas dej hauv cov chaw tsim dej khib nyiab. Cov chaw no raug rau cov kua qaub, cov hauv paus, thiab lwm yam tshuaj lom neeg ntau dhau lub sijhawm ntev. Thaum cov ntaub ntawv ib txwm muaj xeb yooj yim, GFRP yuav luag tsis muaj kev tawm tsam los ntawm tshuaj lom neeg. Cov ntaub ntawv qhia tias tom qab 6 lub hlis raug rau cov kua qaub, nrog pH ntawm 3, GFRP yuav muaj 95% ntawm nws lub zog khoov thawj, yog li muab kev lees paub mus sij hawm ntev rau cov qauv hauv cov chaw tsis zoo thiab cov nqi kho thiab hloov pauv qis. Cov khoom siv laus kuj xav tau kev kho thiab kev txhawb nqa, zoo li ntau lub choj txoj kev thiab cov tsev vaj tse. GFRP yog cov khoom siv txhawb nqa zoo meej vim nws muaj zog, lub teeb yuag, thiab sib txuas zoo nrog cov pob zeb. Hauv cov haujlwm txhawb nqa choj, qhov nruj ntawm cov beams feem ntau yog nplaum nrog GFRP daim ntawv los txhawb nqa lawv hauv kev khoov. GFRP reinforced concrete beams tuaj yeem txhawb nqa txog li 20-50%. Hauv kev kho qhov av, cov khoom siv GFRP mesh siv rau hauv kev txhawb nqa kom txhawb nqa cov pob zeb ib puag ncig thiab ua kom nws ruaj khov dua thiab tiv taus kev txiav. Kev teeb tsa ntawm GFRP lining yog ceev thiab nws tsis cuam tshuam rau cov qauv uas twb muaj lawm thiab yog li ntawd tsim nyog rau kev kho thaum muaj xwm txheej ceev ntawm cov tsev qub thiab cov choj.

Thaum kawg, hauv kev tsim choj thiab qhov av, rau cov choj qub, npog qhov chaw ntawm cov khoom thauj nrogCov ntawv GFRP lossis cov phaj, siv cov tshuaj epoxy tshwj xeeb rau kev sib txuas ruaj khov, tuaj yeem txhim kho lub peev xwm thauj khoom thiab qeeb qeeb cov txheej txheem laus ntawm cov qauv. Hauv kev tsim kho qhov av, GFRP grids ua haujlwm ua ke nrog cov pob zeb ua ke los tsim cov qauv txhawb nqa sib xyaw, ua kom zoo dua qhov kev tiv thaiv shear thiab kev ruaj khov mus sij hawm ntev, tshwj xeeb tshaj yog nyob rau hauv av qeeg.

Kev Sib Piv Kev Ua Haujlwm ntawm GFRP Daim Ntawv Thov hauv Cov Qauv Tsev