Q:Dab tsi yog qhov sib txawv tseem ceeb ntawm ASTM A992 thiab ASTM A572 qib 50 rau h} Be} Beams siv hauv cov tuam tsev?
A:Ob leeg puav leej yog siab - lub zog, qis} {- Beams hauv cov tuam tsev hauv Asmeskas.ATM A992tau tshwj xeeb tsim rau dov dav - flange granges (zoo li w {leads). Nws cov kev xav tau tseem ceeb yog qhov siab tshaj plaws tawm {{3} {{tens tsawg dua los yog sib npaug los yog sib npaug thiab ua tau zoo hauv cov cheeb tsam seismic. Nws feem ntau muaj fy=50 ksi thiab fu=65 ksi.ASTM A572 Qib 50yog qhov dav dav qhia txog cov duab ntau yam (suav nrog cov ces kaum, raws) thiab daim hlau. Nws tseem muaj fy =50 ksi thiab fu =65 ksi li fy / fu piv txwv txog A992. Thaum A572 Gr 50 tseem yog ib qho tseem yog thiab lees paub, A992 feem ntau nyiam rau thawj lub tsev FRAMES vim nws tau lees paub kev txhim kho.
Q:Yuav ua li cas European Cov Qauv Kawm Ntawv rau 10025 txhais cov qauv steel muaj feem cuam tshuam rau h- kab teeb (piv txwv, S235)?
A:EN 10025 txhais cov qauv txheej txheem hlau feem ntau los ntawm lawv qhov tsawg kawg los ntawm kev tawm los lub zog (reh) nyob rau hauv chav sov rau cov nominal thickinges tsawg dua los yog sib npaug rau 16 hli. Qhov kev tsim qauv pib nrog 's' (rau cov qauv hlau), ua raws los ntawm cov txiaj ntsig los ntawm lub zog hauv MPa (piv txwv li} mpa}} mpa mpa mpa). Ntxiv rau cov lus qhia ntxiv rau kev cuam tshuam nrog tawv (piv txwv, J0, K2, K2 rau cov khoom siv tsis zoo, m}}} thermamanically dov). Piv txwv li, s355j {{{20} n n} n qhia tawm cov txiaj ntsig zoo dua lossis sib npaug ntawm 27,} 20 degree, xa tawm hauv qhov xwm txheej qub. H-nqaj (nws, HD, IPE seem) feem ntau tsim nyob rau hauv cov qib nyiam S235JR, S275JR, S255J2, S460M.
Q:Dab tsi yog qhov tseem ceeb ntawm "jis g 3101 ss" kev tsim qauv rau h- Beams hauv Nyij Pooj thiab Asia?
A:JIS G 3101 yog tus qauv xov xwm Japanese rau cov hlau yob rau cov qauv dav. "SS" sawv rau "Hlau qauv". Cov qib yog xaiv los ntawm SS ua ntej los ntawm tus lej sawv cev ntawm lub zog tsawg kawg hauv MPA (piv txwv li, min tensile lub zog 400 min tensile zog 400 mpa). Thaum laus dua, SS400 tseem nyob dav siv rau kev tsim kho dav dav h} ci ci (jis} cov kab teeb meem zoo li h100x100 thiab lwm yam) hauv Nyij Pooj. Nws muaj nominal paib muaj zog nyob ib ncig ntawm 235-245 MPa. Cov ntsiab lus tseem ceeb suav nrog lub zog tensile ntau dua li cov qib kev faib tawm zoo li cov menyuam yaus niaj hnub ua piv txwv li cov khoom siv niaj hnub no (JIS G 3136) uas yog tam sim no ntau dua rau cov ntawv thov seismic.
Q:Vim li cas cov ntsiab lus tseem ceeb uas yuav tsum tau tseem ceeb rau h ing - ci ci siv hauv cov huab cua txias lossis cov tshuaj seismic?
A:Notch nyuaj kev ntsuas cov khoom siv tsis kam mus rau kev nkag mus, uas yuav tsum muaj qhov kub tsawg lossis qis dua {}} Kev Txiaj Ntsig Chaw thau khoom (zoo li av qeeg). Cov lus qhia tshwj xeeb yuam kev tsawg kawg nkaus uas muaj peev xwm (piv txwv li, hauv charpy v {}} cov ntsiab lus sau {{xoom} xoom} xoom} xoom. Rau cov huab cua txias (piv txwv li, cov qauv ntawm Arctic), qib nrog kev muaj zog ntawm qhov tsis tshua muaj kub (piv txwv li 40 16}} 60 degree) yuav tsum los tiv thaiv brittly tsis ua tiav. Nyob rau hauv seismic ib cheeb tsam, ductility yog qhov tseem ceeb heev; Hlau yuav tsum tau tshaj tawm qhov tsis muaj qhov khaus. H-nqaj nyob rau hauv lub sijhawm-tawm tsam cov thav ntawv yuav tsum muaj kev nyuaj (feem ntau ntawm 0℃lossis -20℃deformation thaum lub av nplaum tsis muaj kev puas tsuaj. Cov qauv zoo li AISC 341 (seismic) lossis EN 1998 los qhia tshwj xeeb cov qauv nyuaj.
Q:Dab tsi yog "W" recix qhia tau dab tsi hauv American h- lei letrensions sib txawv ntawm European "nws" nqaj?
A:Cov "W" prefix hauv Asmeskas cov qauv (ASTM A6) sawv rau "dav hide ntawm s {leads (American txheem kab teeb ci (American Txheem Beams nrog cov ntoo flged). Kev tsim qauv zoo li W12x26 txhais tau tias Nominal qhov tob yog kwv yees li 12 nti thiab nws hnyav kwv yees li 26 phaus ib txhais ko taw. Qhov loj me yog nyob rau hauv cov chav nyob imperial. European h- Beams yog tsim tshwj xeeb los ntawm cov npe:NwsBeams (yav dhau los heat, Heeb, hem per EN 10365) yog qhov muaj ntau, nrog parallel flanges zoo sib xws rau w- duab. Qhov tsim qauv (piv txwv li, nws 100 b) b) qhia txog qhov tob ntawm mm (100mm) thiab cov koob / {}}} hnyav).Tus ipeBeams yog sib dua "I" ntu nrog thinner webs / flanges dua li nws cov nqaj. Qhov ntev yog metric. Thaum ua haujlwm zoo sib xws, w thiab nws cov kab teeb tau sib txawv sab series thiab tsis muaj kev sib pauv ncaj qha tsis muaj dua tshiab.
