Khoom npe
Choj txhawb nqa hlau (choj Rebar / Choj Hais txog bar)
1. Cov ntsiab lus
Choj Txhawb Nqa Hlau, tseem hu uaChoj rebar, yog lub siab - lub zog, siab - dзionity} Desility Refension engineered rauChoj Cov Qauv, suav nroglawj, girders, piers, abutments, thiab tuav phab ntsaCov. Nws yog tsim los tiv thaivCov khoom hnyav hnyav, muaj kev ntxhov siab zuj zus, kev co, qaug zog, thiab kev sib kis ib puag ncig{{0- Cov lus mob kom paub ntau dua li kev tsim kho kom zoo nkauj.
Lub choj txhawb nqa hlau ua lub luag haujlwm tseem ceeb hauv kev ua kom covCov Txheej Txheem Kev Ncaj Ncees, Durability, thiab Kev Nyab Xeebntawm cov txuas hniav hauv qab tsheb txuas ntxiv, kub hloov pauv, thiab kev sib tw corrosion. Txhawm rau ua kom tau raws li cov cai no, nws yog tsim sivHigh - Badbon Hlau, Microalloyed Hlau, lossisThermomechanically kho (TMT)Hlau nrog cov kho tshuab ntsuas thiab tshuaj lom neeg.
2. Cov ntaub ntawv faib tawm thiab cov qauv
Cov Rebar Choj feem ntau yog cais raws li cov qauv hauv tebchaws thiab thoob ntiaj teb uas qhia meej meej lub zog, ductility, thiab corrosion tsis kam. Cov sib txig sib luag xws li:
| Lub hom phiaj | Xws li qib | Yield zog (mpa) | Sau ntawv |
|---|---|---|---|
| Tuam Tshoj (GB / T 1499.2) | HRB500E / hrbf500e / hrb600 | 500–600 | Kev Ductility High (e - qib) rau seismic thiab Choj |
| Tebchaws Asmeskas (ASTM A706 / A615) | Qib 60 / Qib 75 / Qib 80 | 420–550 | Rau kev txhawb nqa thiab prestressed choj |
| Teb chaws Europe (EN 10080) | B500C / B600B | 500–600 | Kev Ua Si Kub Loj Thiab Weldability |
| Is Nrias teb (yog 1786) | Fe500D / FE550D / FE600 | 500–600 | D - qib txhais tau tias zoo dua elongation thiab weldability |
| Nyiv (JIS G3112) | SD490 / sd590 | 490–590 | Lub zog siab, qaug zog- ionistant bar rau choj |
Nco tseg:Tsab ntawvE / D / Cqhia tauTxhim Kho Ductilitythiabseismic kev ua tau zoo, Qhov tseem ceeb rau kev txhawb nqa choj.
3. Cov Khoom Siv Kho Tshuab
| Ntiag tug | Cov Khoom Nquag Yog | Kev piav txog |
|---|---|---|
| Yield zog (FY) | 500-650 MPa | Muab cov load muaj zog -} cov kabmob muaj peev xwm |
| Qhov kawg tensile lub zog (FU) | 600-800 MPA | Tsis kam ua siab tawv thiab qaug zog ntxhov siab |
| Elongation (Δ5) | Ntau dua los yog sib npaug rau 12-16% | Tso cai hloov pauv thiab lub zog nqus dej hauv qab cov nra hnyav |
| Elastic Modulus (e) | ≈ 200 GPA | Ua kom nruj me ntsis thiab tawg tswj |
| Qeeb zog tsis kam | Siab | Tsim los rau Cyclic Tsheb Thiab Cov Hluav Taws Xob |
| Hwj txwv | Zoo heev (cov roj carbon qis, ce tsawg dua lossis sib npaug rau 0.45) | Haum rau Welded Choj Nyuaj |
| Corrosion Kuj | Kev xaiv lub tsho tiv no (epoxy, galvanizing, alloyed) | Tiv thaiv chloride - inducle corrosion hauv Choj ARKS |
4. Kev Tsim Kho Cov Txheej Txheem
Lub choj txhawb kev siv hlau yog tsim los ntawm kev tshaj lij metallurgical los xyuas kom muaj xwm yeem, huv, thiab kev ua tau zoo:
Microalloying nrog V, NB, lossis Tirau lub zog thiab tawv.
Kev Kho Mob Thermomechanical (TMT)Rau lub nplua - nplej, tawv nqaij tawv thiab tawv tawv.
TSHUAJ Rolling Thiab TxiasTxhawm rau kho cov qauv thiab txo qis sab hauv kev ntxhov siab.
Yeem Txheej Txheej Txheem:
Kub - dip Galvaningrau kev tiv thaiv corrosion.
Fusion - bayed epoxy txheej(ASTM A775).
Zinc -} Aluminium Alloy Txheej(Galfan hom).
5. Qhov ntev thiab thev taus
Nominal Diameters:10 hli - 50 hli (cov qauv khoom)
Qhov ntau thiab tsawg rau qhov ntau thiab tsawg rau kev siv Choj:16 hli, 20 hli, 25 hli, 32 mm, 40 hli
Ntev:12 m txujcab miv; Kev cai txiav ntev muaj
Kev thev:Txoj kab uas hla ± 0.5%; Ntev ± 50 hli
Deg Daim Ntawv:Ribbed / Deformed rau cov khoom siv muaj zog
| Inch (hli) | Nyhav (kg / m) | Raug |
|---|---|---|
| 12 | 0.888 | Lub teeb qhov cuab lub zog, lawj |
| 16 | 1.578 | Choj slabs thiab diaphragms |
| 20 | 2.466 | Girders thiab abutments |
| 25 | 3.854 | Lub ntsiab lus tseem ceeb - nqa cov tuav |
| 32 | 6.313 | Piers, sib sib zog nqus lub foundations |
| 40 | 9.865 | Chojive Choj Girders |
6. Cov yam ntxwv tseem ceeb thiab cov txiaj ntsig
✅ Siab zog - rau - qhov hnyav. Piv:Tso cai rau cov qauv tsim nyog nrog kev txo cov hlau noj.
✅ Ductility zoo heev:Abse poob siab thiab kev co los ntawm kev txav mus los thiab cua.
✅ Superior qaug zog:Withstands rov qab ua rau cyclic ntxhov siab nyob rau hauv hnyav - tsheb txuas tsheb.
✅ Zoo kawg kev ua tau zoo:Deformed saum yeej ua kom cov khoom siv hluav taws xob ruaj khov hauv pob zeb ua.
✅ Corrosion Refantance Cov kev xaiv:Haum rau marine txuas hniav thiab chaw ib puag ncig ib puag ncig.
✅ Lub neej ntev kev pab lub neej:Txo cov kev saib xyuas txij nkawm thiab cov txheej txheem ntev dua.
7. Kev thov
Choj lawj thiab slabs(lub ntsiab ntawm lub zog thiab tawg tswj).
Choj girders, arches, thiab trussesxav tau high tensile kev ua tau zoo.
Choj Piers, abutments, thiab khaws phab ntsa.
Raug tshem tawm thiab cable -} Nyob twj ywm choj Anchorage Zones.
Kev loj thiab kev tsheb nqaj hlau hla, qho, thiabTubrog Taw Qhia.
Choj kho thiab retrofits(Hloov rebar, corrosion - tsis kam ntxiv).
8. Txheej thiab Kev Tiv Thaiv Corrosion
Txhawm rau ncua lub neej, ntau yam kev xaiv tiv thaiv tau thov raws li ib puag ncig:
Kub - dip galvanized rebar:Zinc Txheej 80-275 G / M² (ASTM A767).
Epoxy - coated rebar:Fusion - bonded ntsuab lossis xiav txheej rau chloride tsis kam.
Zinc -} aleâ txhuas txheej (galfan):Cov adhesion zoo dua thiab kev tiv thaiv corrosion.
Stainless hlau Rebar:Rau cov qauv tseem ceeb nrog 75-100-xyoo tsim lub neej.
Cathodic Kev Tiv Thaiv Npaj Tawm Rebar:Siv nyob rau hauv choj decks nrog cov khoom siv hluav taws xob.
9. Cov ntaub ntawv ua ke, vuam, thiab tuav
Dabtsi yog khoov:Ua kom cov khoom seem tsawg kawg nkaus (ntau dua lossis sib npaug nrog 6 × bar txoj kab uas yog HRB500).
Vuam:Tsuas yog rau cov qib weldable (piv txwv li, hrb500e, Astm A706); Siv WPS pom zoo.
Tej:Neeg kho tshuab lossis cov txiab hydraulic nyiam; Zam Ntav Txiav Cov Cawv Cov Cawv.
Cia:Cia kom nce thiab qhuav; Cov kab tuav tau yuav tsum muab cia kom deb ntawm UV teeb.
Kev tso kawm:Xyuas kom meej tias qhov chaw raug kaw thiab npog tuab ib tus qauv tsim (los tiv thaiv corrosion).
10. Tswjhwm thiab kuaj
Choj rebar undergoes ntau txoj kev nruj dua kev ntsuam xyuas piv rau cov qauv txhawb:
Kev ntsuam xyuas txhua yam:Yield, tensile, elongation, thiab khoov / rov qab ntsuas.
Qaug zog kuaj:Rov ua dua Cyclic thauj khoom kom paub tseeb nyob rau hauv kev ntxhov siab ntawm tsheb.
Charpy cuam tshuam:Tshaj tawm kev tawv ntawm cov kub tsawg.
Tshuaj lom neeg cov tshuaj:Carbon sib npaug (CE) tsawg dua lossis sib npaug rau 0.45 rau Weldability.
Daim txheej Thickness Kuaj:Rau galvanized lossis epoxy -} coated hom.
Thib peb -} kev tshuaj xyuas:TÜV / SGS / BV muaj ntawv pov thawj thaum thov.
MTC:Muab rau txhua pob rau tag nrho traceeability.
11. Cov lus sib piv
| Ntiag tug | Lub tsev rebar | Choj rebar |
|---|---|---|
| Yield zog (mpa) | 335–400 | 500–650 |
| Tensile lub zog (mpa) | 450–550 | 600–800 |
| Kev ua siab loj | Tswj kav | High (E / D Qib) |
| Qeeb zog tsis kam | Zoo li ib txwm | Siab |
| Corrosion tiv thaiv | Yam ua tau | Yuav xav tau |
| Raug | Tsev | Txuas hniav, kev hla, cov qauv ua haujlwm |
12. Ntim thiab xa khoom
Bundles:1-3 tons txhua, cim npe nrog cov cua sov, loj, qib kawm, thiab qauv.
Cov khoom siv hluav taws xob:Waterproof Wrapping, Steel Strapping, Seaworthy Packing.
Tus Me Nyuam Daim Ntawv:Ncaj ncaj lossis coils (tsawg dua lossis sib npaug rau 12 hli).
Khij:Xim Xim Code lossis cim qhia txog tus qauv thiab qib (piv txwv li, hrb500e, Astm A706 Qib 75).
13. Cov Qauv Qauv thiab Tsim Qauv
GB / T 1499.2-2018:Kub -} ribbed tuav rau choj txhawb nqa.
ASTM A615 / A706:Carbon Steel thiab weldable deformed tuav rau choj.
Aashto lrfd:Choj tsim qauv hauv Asmeskas
EN 10080:Kev cai lij choj tshwj xeeb rau kev txhawb nqa qhob hniavkas.
JIS G3112:Japanese tus qauv rau kev siv cov qauv choj.
Yog 1786:Indian tus qauv rau high - ductancion Choj Qhov Cuab lub zog.
14. Ntsiab lus
Choj Txhawb Nqa Hlauyog aTshwj xeeb, siab - Kev Ua Haujlwm RebarTsim los rau xazoo tshaj lub zog, ductility, thiab corrosion tsis kamnyob rau hauv tus neeg xav tau kev tsim kho choj. Nws ua kom pom tseeb uas txuas lub suab zoo li qub thiab ruaj khov txawm tias muaj kev co tas li, kev tsheb thauj khoom, thiab kev sib kis ib puag ncig.
Los ntawm kev sivQib 500-600e RebarsnrogCov Khaub Ncaws Tiv Thaiv, engineers tuaj yeem ua tauTxuas Lub Tebchaws Choj Kev Pabcuam Lub Neej, Txo kev txij nkawm, thiabTxhim Kho Kev Nyab Xeebrau kaum ntawm kev ua haujlwm.
Koj puas xav kom kuv tsim aChoj rebar technical (pdf)Tom ntej no - sau cov ntsiab lus nws cov qib, txheej txheem hom, thiab cov neeg raug txiav tawm, girder)?
Cim npe nrov: Choj txhawb cov hlau, Tuam choj choj txhawb nqa cov chaw tsim khoom hlau, cov chaw muag khoom, Hoobkas
