Peb cov kub dov steel H/I beams, muaj nyob rau hauv ntau yam ntawm cov qib hwm xws li ASTM A36, S235jr, S355jr, Q195, Q235, Q345, thiab Ss400, yog siab -kev ua tau zoo ntawm cov khoom siv ncaj qha los ntawm cov chaw tsim khoom ntawm tus nqi ncaj qha.{8} Raws li cov khoom tseem ceeb rau kev tsim kho, cov kab teeb no sib xyaw ua ke nrog cov cuab yeej siv hluav taws xob kub siab, kho cov khoom siv sib txawv ntawm cov qib steel sib txawv, thiab tus nqi -cov khoom siv tau zoo, ua rau lawv muaj kev ntseeg siab thiab kev lag luam rau kev tsim kho thoob ntiaj teb thiab kev xav tau ntau.
Hais txog cov khoom siv tseem ceeb, txhua qib hauv cov khoom lag luam no ua raws li cov qauv thoob ntiaj teb lossis lub teb chaws, muab cov kev ua tau zoo sib txawv los ua kom tau raws li qhov xav tau ntawm kev tsim kho. ASTM A36, lub ntiaj teb lees paub cov qib carbon steel, muaj qhov tsawg kawg nkaus lub zog ntawm 250 MPa thiab zoo heev weldability, ductility, thiab formability, zoo tagnrho rau kev siv cov qauv siv xws li cov kab teeb hauv tsev thiab cov kab hauv tsev lag luam. European txheem qib S235jr thiab S355jr muab cov qib siab zog: S235jr (tsawg kawg yield zog 235 MPa) ua tau zoo nyob rau hauv lub teeb mus rau nruab nrab-lub luag hauj lwm tsim, thaum S355jr (tsawg kawg yield zog 355 MPa) muab kev txhim kho load- hnyav hnyav xws li cov kab mob.
Suav tus qauv qib Q195, Q235, thiab Q345 npog cov kev xav tau ntawm kev ua haujlwm. Q195, cov pa roj carbon me me nrog qhov tsawg kawg nkaus lub zog ntawm 195 MPa, yog tus nqi - zoo rau cov khoom siv lub teeb xws li purlins thiab bracings. Q235 (tsawg kawg yield zog 235 MPa) sib npaug kev ua tau zoo thiab kev lag luam, dav siv hauv vaj tse thiab kev lag luam. Q345, siab -lub zog qis- alloy steel (tsawg kawg yield zog 345 MPa), muaj superior toughness thiab qaug zog tsis kam rau siab -nce thiab loj-span lug. Ss400, ib tug Japanese standard carbon steel, boasts txhim khu kev qha tensile zog thiab formability, ua hauj lwm raws li ib tug ntau yam kev xaiv rau lub ntiaj teb no kev tsim kho tej yaam num.
Cov txheej txheem kub dov txheej txheem yog qhov tseem ceeb ntawm cov kab H/I no. Thaum lub sij hawm tsim khoom, steel billets yog rhuab mus rau qhov kub siab tshaj 1000 ° C thiab txuas ntxiv dov rau hauv H los yog kuv hla -sectional profiles. Cov txheej txheem no ua kom zoo dua cov hlau cov qauv nplej, txhim kho cov khoom sib xws, kev ruaj ntseg, thiab cov qauv kev ncaj ncees thaum txo qis hauv kev ntxhov siab thiab qhov tsis xws luag. Muab piv rau cov khaub thuas- dov lwm txoj kev, kub dov H/I kab teeb pom kev zoo dua qhov raug, nto zoo, thiab thauj khoom- bearing efficiency. H/I-zoo li tus ntoo khaub lig-sectional tsim- suav nrog cov flanges sib npaug thiab lub vev xaib hauv nruab nrab- ua kom zoo tshaj qhov kev faib tawm ntawm lub sijhawm bending, compressive force, thiab shear loads, kom ntseeg tau tias muaj kev sib kis tau zoo thiab lub zog zoo- rau{13}}
Raws li cov chaw tsim khoom- muab cov khoom lag luam nrog lub Hoobkas- tus nqi ncaj qha, cov kab hluav taws kub H/I no muab cov txiaj ntsig zoo rau cov neeg yuav khoom ntau, suav nrog cov tuam txhab tsim kho, cov neeg cog lus, thiab cov khoom siv hauv tsev. Cov saw hlau ncaj qha tshem tawm cov kev sib txuas nruab nrab, txo cov nqi kev yuav khoom thaum ua kom muaj kev tswj xyuas zoo los ntawm kev xaiv raw khoom mus rau qhov kawg ntawm kev tsim khoom. Tag nrho cov kab teeb yog nrog los ntawm cov ntaub ntawv pov thawj zoo, tshawb xyuas kev ua raws li cov qauv tsim nyog thiab lav qhov kev ua tau zoo rau kev tsim kho.
Hauv kev tsim kho, cov ntau- qib kub dov H/I beams tau siv dav hauv ntau qhov haujlwm. Lawv ua haujlwm ua haujlwm tseem ceeb-cov khoom muaj nyob hauv thaj chaw siab- nce siab, cov chaw lag luam, cov tsev khaws khoom lag luam, txuas hniav, chaw ntau pob, thiab pej xeem infrastructure. Q195 thiab S235jr yog qhov zoo tagnrho rau lub teeb -cov haujlwm ua haujlwm; Q235, ASTM A36, thiab Ss400 rau kev tsim kho dav dav; thiab Q345 thiab S355jr rau hnyav-lub luag haujlwm, loj- ncua cov haujlwm. Kev sib raug zoo nrog ntau yam kev tiv thaiv saum npoo (xws li, tiv thaiv- pleev xim rau xeb, galvanization) txhim kho lawv cov kev tiv thaiv ib puag ncig kev yaig, ncua kev pab cuam lub neej nyob rau hauv ntau yam huab cua.
Txhawm rau kom ua tiav, peb lub Hoobkas- muab cov khoom kub dov steel H / I beams (ASTM A36, S235jr, S355jr, Q195, Q235, Q345, Ss400) sawv cev rau tus nqi - siv tau thiab siab -kev ua haujlwm zoo rau kev tsim kho. Kev sib txuas cov khoom siv tsim nyog, cov cuab yeej siv hluav taws xob kub siab, cov nqi tsim khoom ncaj qha, thiab kev siv dav, lawv ua tau raws li qhov xav tau ntawm kev ua tau zoo thiab kev lag luam rau kev tsim kho thoob ntiaj teb. Kev ntseeg siab los ntawm cov kws tshaj lij kev tsim kho thoob ntiaj teb, cov kab teeb no yog qhov kev xaiv tseem ceeb rau kev yuav khoom ntau hauv kev lag luam khoom siv.
