1) Nominal lub cheeb ntau thiab pom zoo txoj kab uas hla
The nominal diameter of steel bars ranges from 6 to 50mm, and the standard recommended nominal diameters of steel bars are 6, 8, 10, 12, 14, 16, 20, 25, 32, 40, and 50mm.
2) Kev pub rau kev sib txawv ntawm cov duab nto thiab qhov loj ntawm cov pob ribbed steel bar
Tus tsim cov ntsiab lus ntawm transverse ribs ntawm ribbed steel cov tuav yuav ua tau raws li cov cai hauv qab no:
Lub kaum ntse ntse β ntawm cov tav toj thiab cov axis ntawm cov hlau bar yuav tsum tsis txhob tsawg dua 45 qib. Thaum lub kaum sab xis tsis muaj ntau dua 70 degrees, cov kev taw qhia ntawm lub chants transverse ntawm sab nraud ntawm cov steel bar yuav tsum rov qab los;
Lub nominal txuas l ntawm transverse ribs yuav tsum tsis txhob loj dua 0.7 zaug ntawm nominal txoj kab uas hla ntawm tus hlau bar;
Lub kaum sab xis α ntawm ib sab ntawm cov tav toj thiab saum npoo ntawm lub bar steel yuav tsis tsawg tshaj 45 degrees;
Qhov suav ntawm cov khoob (nrog rau qhov dav ntawm longitudinal ribs) ntawm qhov kawg ntawm cov kab hlau yuav tsum tsis txhob loj dua 20% ntawm ib puag ncig ntawm cov hlau bar;
Thaum lub nominal lub cheeb ntawm cov hlau bar tsis ntau dua 12 hli, cov txheeb ze cov cheeb tsam yuav tsum tsis pub tsawg tshaj 0.055; Thaum lub nominal lub cheeb yog 14mm thiab 16 hli, qhov chaw txheeb ze yuav tsum tsis tsawg tshaj 0.060; Thaum lub nominal diaminal loj tshaj 16mm, tus txheeb ze tav cheeb tsam yuav tsum tsis pub tsawg tshaj 0.065. Xa mus rau Daim Ntawv Ntxiv C rau kev xam ntawm cov txheeb ze tav.
Ribbed steel tuav feem ntau muaj ntev ribs, tab sis kuj tsis muaj kev sib tw ntev;
3) ntev thiab tso cai sib txawv
A. ntev:
Cov kab hlau feem ntau xa tawm hauv qhov ntev ntev, thiab cov khoom xa tawm tshwj xeeb yuav tsum tau qhia hauv daim ntawv cog lus;
Kev txhawb nqa cov kab tuaj yeem xa tawm hauv coils, thiab txhua lub teb yuav tsum yog ib qho reels, tso cai 5% yog tias tsawg dua ob) muaj ob tus rebars. Lub disk ceeb thawj thiab cov taub plawv kab yog txiav txim los ntawm kev sib tham ntawm tus neeg xa khoom thiab tus yuav.
B. Ntev ntev:
Qhov kev sib tw pub dawb ntawm qhov ntev ntawm tus hlau bar thaum nws tau xa mus rau qhov ntev ntev yuav tsum tsis muaj ntau dua ± 25mm;
Thaum qhov ntev tshaj plaws yuav tsum tau, nws yeej txawv yog + 50 hli;
Thaum qhov ntev tshaj plaws yog qhov yuav tsum tau, qhov sib txawv yog -50mm.
C. Nkhaus thiab xaus:
Qhov kawg ntawm tus hlau bar yuav tsum tau sheared ncaj, thiab kev deformation hauv zos yuav tsum tsis cuam tshuam rau kev siv.
