Cov qauv hlauyog cov khoom siv hauv tsev tsim los ntawm qee qib ntawm cov hlau thiab tuaj nyob rau hauv ntau yam kev lag luam tus qauv hla ntu duab (lossis "profiles").Cov qib steel qauv yog tsim nrog cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab tsim los rau kev siv tshwj xeeb.
Hauv Tebchaws Europe, cov qauv hlau yuav tsum ua raws li European tus qauvTS EN 10025, uas yog tswj hwm los ntawm European Committee for Iron and Steel Standardization (ECISS), ib pab pawg ntawm European Committee for Standardization (CEN).
Muaj ntau ntau yam piv txwv ntawm European structural steel qib, xws li S195, S235, S275, S355, S420 thiab S460.Hauv tsab xov xwm no, peb yuav tsom mus rau cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab thiab kev siv ntawm S235, S275 thiab S355, peb hom qauv steel qib siv nyob rau hauv ntau yam kev tsim kho hauv European Union.
Raws li Eurocode kev faib tawm, cov qauv hlau yuav tsum raug xaiv los ntawm cov qauv cim suav nrog tab sis tsis txwv rau S, 235, J2, K2, C, Z, W, JR thiab JO, qhov twg:
Nyob ntawm cov txheej txheem tsim khoom, tshuaj lom neeg muaj pes tsawg leeg, thiab daim ntawv thov cuam tshuam, cov ntawv ntxiv thiab kev faib tawm yuav raug siv los txheeb xyuas cov qib steel tshwj xeeb lossis cov khoom lag luam.
Kev faib tawm EU tsis yog tus qauv thoob ntiaj teb, yog li ntau cov qib cuam tshuam nrog tib cov tshuaj thiab cov khoom siv kho tshuab tuaj yeem siv rau lwm qhov hauv ntiaj teb.Piv txwv li, cov qauv hlau tsim rau Asmeskas kev lag luam yuav tsum ua kom tau raws li cov cai ntawm American Society for Testing and Materials (ASTM).Cov lej thoob ntiaj teb pib nrog "A" ua raws li cov chav kawm tsim nyog, xws li A36 lossisA53.
Nyob rau hauv ntau lub teb chaws, cov qauv steel yog tswj thiab yuav tsum tau raws li yam tsawg kawg nkaus cov qauv rau cov duab, loj, tshuaj muaj pes tsawg leeg thiab lub zog.
Cov tshuaj muaj pes tsawg leeg ntawm cov qauv hlau yog qhov tseem ceeb heev thiab tswj tau zoo heev.Qhov no yog qhov tseem ceeb tshaj plaws uas txiav txim siab cov khoom siv ntawm cov hlau.Nyob rau hauv cov lus hauv qab no koj tuaj yeem pom qhov feem pua siab tshaj plaws ntawm qee yam hloov kho tau tam sim no nyob rau hauv European qauv steel qib S235,S275thiab S355.
Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov qauv hlau yog qhov tseem ceeb heev thiab tswj nruj heev.Nws yog ib qho tseem ceeb tshaj plaws uas txiav txim siab cov khoom ntawm cov hlau.Hauv cov lus hauv qab no koj tuaj yeem pom qhov feem pua siab tshaj plaws ntawm qee qhov kev tswj hwm hauv European cov qauv steel qib S235, S275 thiab S355.
Cov tshuaj muaj pes tsawg leeg ntawm cov qauv hlau yog qhov tseem ceeb heev rau cov engineers thiab yuav txawv ntawm qib mus rau qib nyob ntawm seb nws xav siv.Piv txwv li, S355K2W yog cov khoom siv hlau tawv tawv, hu ua K2, nrog cov tshuaj lom neeg muaj pes tsawg leeg tsim los rau kev tiv thaiv huab cua ntau dua - W. Yog li, cov tshuaj muaj pes tsawg leeg ntawm cov qauv steel qib no txawv me ntsis ntawm tus qauv.S355 qib.
Mechanical zog ntawm cov qauv steel underlies nws cov kev faib thiab daim ntawv thov.Txawm hais tias cov tshuaj lom neeg muaj pes tsawg leeg yog qhov tseem ceeb uas txiav txim siab cov khoom siv ntawm cov hlau, nws tseem ceeb heev kom paub cov yam ntxwv yam tsawg kawg nkaus rau cov khoom siv kho tshuab lossis kev ua haujlwm, xws li lub zog tawm los thiab lub zog tensile, raws li tau piav qhia hauv qab no.
Cov qauv steel yield zog ntsuas qhov tsawg kawg nkaus quab yuam yuav tsum tsim kom muaj deformation mus tas li hauv cov hlau.Lub npe hu ua convention siv nyob rau hauv European tus qauv EN10025 hais txog qhov tsawg kawg nkaus yield zog ntawm steel qib kuaj ntawm 16 hli thickness.
Lub zog tensile ntawm cov qauv hlau muaj feem xyuam rau lub ntsiab lus ntawm qhov kev hloov pauv mus tas li tshwm sim thaum cov khoom siv stretched los yog stretched transversely raws nws ntev.
Cov qauv hlau tuaj nyob rau hauv ntau qib, tab sis feem ntau yog muag preformed rau hauv ib qho kev hla ntu uas tsim los rau ib daim ntawv thov tshwj xeeb.Piv txwv li, cov qauv steel muag raws li I-beams, Z-beams, lub thawv lintels, hollow structural seem (HSS), L-beams, thiab steel phaj yog ntau.
Raws li qhov xav tau ntawm daim ntawv thov, tus kws tshaj lij qhia cov qib steel-feem ntau kom ua tau raws li qhov tsawg kawg nkaus lub zog, qhov hnyav tshaj plaws, thiab cov kev xav tau ntawm huab cua-nrog rau cov duab seem- txheeb ze rau qhov xav tau ntawm qhov chaw thiab kev cia siab ntawm kev thauj khoom lossis kev thauj khoom.ua hauj lwm kom ua.
Cov qauv hlau muaj ntau yam kev siv, thiab nws cov ntawv thov muaj ntau yam.Lawv muaj txiaj ntsig tshwj xeeb vim lawv muaj kev sib xyaw ua ke ntawm cov khoom zoo weldability thiab lav lub zog.Cov qauv hlau yog cov khoom lag luam hloov tau yooj yim uas feem ntau nyiam los ntawm cov kws ua haujlwm nrhiav kom ua kom lub zog loj tshaj plaws lossis S-zoo li cov qauv thaum txo lawv qhov hnyav.
Lub sij hawm xa tuaj: Plaub Hlis-13-2023