Kev tshawb fawb txog kev ua tau zoo ntawm cov khoom siv cementitious basalt fiber reinforced nrog BFRP tendons

Cov yam tseem ceeb uas cuam tshuam rau kev ua tau zoo ntawm kev sib txuas

1. Kev ntsuas qhov ntim thiab qhov ntev ntawm cov fiber

Qhov ntim doping ntawm Basalt Cov xov luv luv muaj qhov cuam tshuam loj rau lub zog sib txuas, thiab qhov kev sim qhia tau hais tias qhov ntim doping ntawm 0.2% muaj qhov cuam tshuam zoo tshaj plaws rau kev txhim kho lub zog sib txuas, thiab doping ntau dhau yuav ua rau kev ua haujlwm poob qis vim yog cov fiber sib sau ua ke.

Qhov ntev ntawm cov fiber (piv txwv li 6 hli thiab 18 hli) muaj qhov cuam tshuam tsawg dua rau lub zog sib txuas, tab sis cov fiber luv dua yooj yim tawg kom txo cov teeb meem ntawm cov interfacial.

2. Chav kawm muaj zog ntawm cov pob zeb siv rov qab

Kev nce qib zog ntawm cov pob zeb ua dua tshiab (piv txwv li, ntawm C30 txog C40) ua rau lub zog sib txuas ntawm B nce ntxivKev Txhawb Nqa Frp thiab lub substrate, tab sis qhov nce ntxiv yog txwv, thiab qhov interface yog qhov yooj yim rau brittle peeling thaum lub zog qib siab dhau.

3. Kev kho qhov sib txuas thiab tus neeg sawv cev txuas

Sandblasting qhov chaw ntawm BFRP Kev txhawb zog tuaj yeem ua rau kom qhov roughness thiab txhim kho lub zog tom; ntxiv silane coupling agent tuaj yeem ua kom zoo dua qhov kev sib txuas tshuaj ntawm cov fiber thiab resin matrix thiab txo qhov kev sib txhuam ntawm cov interfacial.

Kev ntsuam xyuas thiab cov txheej txheem ntawm cov khoom nplaum

1. Kev sim rub tawm ntawm qhov chaw nruab nrab

Daim kab nkhaus bond-slip tau kawm los ntawm kev sim rub tawm, thiab nws tau pom tias hom kev puas tsuaj ntawm daim ntawv cog lus feem ntau yog tendon rub tawm lossis concrete splitting. Qhov ntxiv ntawm cov fiber basalt tuaj yeem ncua qhov kev puas tsuaj ntawm cov pob zeb thiab ua kom cov ductility zoo dua.

Qhov ntau ntawm lub zog sib txuas yog 6-12 MPa, thiab tus nqi tshwj xeeb yog cuam tshuam los ntawm cov tshuaj fiber, txoj kab uas hla ntawm lub zog txhawb nqa (piv txwv li, 16 hli) thiab cov txheej txheem kho interface.

2. Qauv faib kev ntxhov siab ntawm daim ntawv cog lus

Qhov kev ntxhov siab ntawm kev sib txuas yog faib tsis raws kab raws li qhov ntev ntawm qhov kev txhawb nqa, thiab qhov kev ntxhov siab siab tshaj plaws yog nyob rau ntawm qhov kawg ntawm kev thauj khoom. Tus qauv theoretical yuav tsum xav txog qhov kev tiv thaiv kev tawg thiab kev sib txhuam ntawm cov fiber-reinforced concrete.

Cov txiaj ntsig ntawm daim ntawv thov thiab cov xwm txheej engineering

1. Kev tiv thaiv corrosion thiab durability

BFRP reinforcement khaws cia ntau dua 90% ntawm nws lub zog sib txuas hauv chloride ion erosion ib puag ncig (piv txwv li, marine engineering), uas zoo dua li hlau thiab fiberglass reinforcing bars.

Piv txwv li: Qingdao Cross-Sea Choj siv BFRP reinforcement los hloov cov hlau reinforcement, thiab nws lub neej ntev tau ntev dua 100 xyoo.

2. Kev Ua Tau Zoo Thaum Sib Nqus Thiab Av Qeeg

Qhov ceev ntawm BFRP reinforcement tsuas yog 1/4 ntawm cov hlau, uas tuaj yeem siv los txhawb cov beams pob zeb kom txo qhov hnyav ntawm cov qauv los ntawm 20% -30%, thiab tib lub sijhawm txhim kho lub peev xwm siv hluav taws xob los ntawm kev qhwv cov reinforcement.

Cov Teeb Meem Uas Muaj Lawm Thiab Kev Taw Qhia Txog Kev Txhim Kho

1. Kev txhim kho kev sib txuas ntawm cov neeg sib txuas

Teeb meem uas twb muaj lawm: Qhov sib txuas ntawm cov fibers thiab cov cement matrix yog qhov yooj yim tev tawm vim muaj kev ntxhov siab, thiab cov neeg sawv cev nano-modified interfacial (piv txwv li, nano-SiO₂ doped) yuav tsum tau tsim los txhim kho kev sib txuas tshuaj lom neeg.

2. Kev ua tau zoo mus sij hawm ntev thiab kev ua kom raws li tus qauv

Yog tias tsis muaj cov ntaub ntawv nkag mus ntev hauv qab qhov kub thiab txias thiab av noo siab (piv txwv li, ntau tshaj 10 xyoo), kev kuaj xyuas kev laus sai yog qhov xav tau los xyuas kom meej; cov lus qhia tsim qauv tseem tsis tau sib xws thoob plaws lub tebchaws, thiab txawm hais tias Tuam Tshoj tau tso tawm tus qauv GB / T 38143-2019, cov lus qhia tsim qauv tseem yuav tsum tau txhim kho.

3. Kev tsim qauv sib koom tes ntau qhov loj

Nyob rau hauv lub neej yav tom ntej, peb tuaj yeem tshawb nrhiav cov thev naus laus zis sib xyaw ua ke ntawm BFRP kev txhawb nqa thiab cov hlau fiber / carbon fiber los tsim cov khoom sib xyaw gradient thiab sib npaug lub zog thiab ductility.

Cov Kev Qhia Txog Kev Tshawb Fawb Yav Tom Ntej  

1. Kev saib xyuas ntse thiab kev ua qauv digital

Cov cuab yeej ntsuas fiber optic uas muab tso rau hauv BFRP tendons, kev saib xyuas lub sijhawm tiag tiag ntawm kev sib txuas ntawm qhov sib txuas thiab kev tawg, ua ke nrog kev simulation ntawm cov khoom kawg kom zoo dua qhov tsim.

2. Cov txheej txheem npaj cov pa roj carbon tsawg

Txo qhov kub thiab txias ntawm cov fiber basalt fiber (tam sim no 1400-1500 ℃), kev tsim cov tshuaj kho kom sov qis kom txo tau kev siv hluav taws xob.

3. Kev siv cov khoom siv rov ua dua tshiab zoo

Muab cov pob zeb ua los ntawm cov pob zeb thiab cov fiber basalt rov ua dua tshiab nrog cov khib nyiab tsim kho kom txhawb nqa cov khoom siv hauv tsev ntsuab "txhua yam rov ua dua tshiab" thiab txo cov peev txheej siv.

Kev Txheeb Xyuas

Kev tshawb fawb txog kev ua tau zoo ntawm kev sib txuas ntawm cov khoom siv cementitious basalt fiber-reinforced thiab BFRP Cov tendons tau ua tiav cov txiaj ntsig theem ib theem zuj zus, tab sis nws daim ntawv thov loj tseem yuav tsum tau tawg los ntawm cov teeb meem ntawm kev ua kom zoo dua qub, kev txheeb xyuas lub sijhawm ntev thiab kev tsim qauv txheem. Yav tom ntej, los ntawm kev tsim kho tshiab ntau yam (piv txwv li, cov ntaub ntawv ntse, cov txheej txheem carbon tsawg), nws xav tias yuav ua tiav cov kev tshawb fawb hauv kev tsim kho hauv hiav txwv thiab kev tiv thaiv av qeeg, thiab pab txhawb kev tsim cov tsev ruaj khov.