I. Mafotokozedwe a Diameter (Main Application Range) Mafotokozedwe a diameter a HRB400E rebar ayenera kutsatira mosamalitsa "Hot-rolled Ribbed Steel Bars for Reinforced Concrete" (GB/T 1499.2-2018). Ma diameter odziwika bwino ndi 6mm-50mm, omwe akuphatikizapo zochitika zambiri zopsinjika mu uinjiniya. Ma diameter osiyanasiyana amagwirizana ndi zofunikira zosiyanasiyana zogwiritsira ntchito, motere: Ma diameter ang'onoang'ono (6mm-12mm): Amagwiritsidwa ntchito makamaka pazinthu zazing'ono, ma stirrups, ndi ma distribution bar, monga ma distributing bar a floor slab, ma wall tie bar, lintel stirrups, ndi zina zotero. Mafotokozedwe odziwika bwino ndi 6mm, 8mm, 10mm, ndi 12mm; Ma diameter apakati (14mm-25mm): Omwe amagwiritsidwa ntchito kwambiri, oyenera zinthu zolimbitsa thupi monga ma frame beams, frame columns, shear wall edge members, ndi pile caps. Mafotokozedwe odziwika bwino ndi 14mm, 16mm, 18mm, 20mm, 22mm, ndi 25mm; Chimake chachikulu (28mm-50mm): Chimagwiritsidwa ntchito kwambiri m'mapangidwe akuluakulu, zinthu zolemera kapena zinthu zolemera kwambiri, monga mizati yayikulu ya chimango, matabwa akuluakulu a mlatho, makhola achitsulo oyambira, ndi zida zazikulu zolimbikitsira maziko. Mafotokozedwe odziwika bwino ndi 28mm, 32mm, 36mm, 40mm ndi 50mm. II. Miyeso Yakunja ndi Magawo a Nthiti (Zofunikira Zofunikira)
Chipinda cholumikizira cha HRB400E chili ndi gawo lozungulira lokhala ndi nthiti m'litali mwake. Nthitizo zimagawidwa m'zipinda zotalika (zofanana ndi mzere wa rebar) ndi nthiti zopingasa (pa ngodya inayake ku mzere). Zofunikira ziyenera kukwaniritsa izi kuti zitsimikizire kuti zikugwirizana bwino ndi konkriti:
Kapangidwe ka Nthiti Zopingasa:
Ngodya: Ngodya ya β pakati pa nthiti yopingasa ndi mzere wa rebar iyenera kukhala pakati pa 45° ndi 60°. Pamene m'mimba mwake wa rebar uli d ≤ 12mm, ngodyayo ikhoza kukulitsidwa bwino mpaka 30°.
Kutalikirana: Mpata wa nthiti zopingasa l uyenera kusinthidwa kuti ugwirizane ndi kukula kwake. Mwachitsanzo, l ≤ 12mm pamene d = 6mm, l ≤ 20mm pamene d = 25mm, ndi l ≤ 25mm pamene d = 50mm. Kupatuka kwa mtunda wa nthiti zopingasa pa rebar yomweyi sikuyenera kupitirira ±10%.
Kutalika: Kutalika kwa nthiti yopingasa h kuyenera kukwaniritsa zofunikira za mphamvu ndi mgwirizano. Mwachitsanzo, h ≥ 0.8mm pamene d = 10mm, ndi h ≥ 0.8mm pamene d = 20mm. Pamene h ≥ 1.5mm, ndi d = 40mm, h ≥ 2.4mm, ndipo kutalika kwenikweni koyezedwa sikuyenera kukhala kochepera 90% ya mtengo wokhazikika. Kapangidwe ka Nthiti Yaitali: Kuchuluka: Rebar iliyonse imafuna nthiti ziwiri zopingasa zomwe zimagawidwa mofanana. M'lifupi b wa nthiti yaitali uyenera kufanana ndi m'mimba mwake, mwachitsanzo, b = 2.0mm pamene d = 16mm, b = 3.0mm pamene d = 32mm; Kutalika: Nthiti yaitali iyenera kuyendetsa kutalika konse kwa rebar popanda mipata kapena kusokonezeka pang'ono, ndipo pamwamba pa nthiti yaitali uyenera kusuntha bwino kupita pamwamba pa nthiti yopingasa kuti upewe kupsinjika komwe kumachitika chifukwa cha m'mbali zakuthwa. Kupatuka kwa Gawo: Kupatuka kwenikweni kwa m'mimba mwake kwa rebar kuyenera kukhala mkati mwa ±0.4mm (mwachitsanzo, pa rebar yokhala ndi m'mimba mwake wa 20mm, m'mimba mwake weniweni woyesedwa uyenera kukhala pakati pa 19.6mm ndi 20.4mm); Kupatuka kwa perimeter ya gawo sikuyenera kupitirira ±2%, ndipo ellipticity (kusiyana pakati pa m'mimba mwake wapamwamba ndi wochepera wa gawo) iyenera kukhala ≤0.4mm kuti zitsimikizire mawonekedwe a gawo komanso kufalikira kofanana kwa kupsinjika.
Nthawi yotumizira: Novembala-19-2025