I-beam, tseem hu ua steel beam, yog steel bar nrog I-shaped cross-section. Muaj ob hom I-beams, ib qho zoo tib yam thiab lwm yam yog lub teeb. Qhov no yog ib hom hlau nrog "I"-zoo li tus ntoo khaub lig seem.
Txawm hais tias nws yog ib qho yooj yim I-nqaj lossis lub teeb yuag I-nqaj, nws yog vim tias lawv cov ntu ntu ntu yog siab heev thiab nqaim, thiab lub sijhawm ntawm inertia ntawm ob lub ntsiab axes txawv heev, yog li lawv tag nrho ntawm lub dav hlau qhov twg. lawv nyob. Siv ncaj qha. online. Nws kuj tuaj yeem ua rau hauv ib lub lattice-type stressed tivthaiv. Txoj kev no tsis haum rau cov tswv cuab axial compression thiab cov tswvcuab nkhaus sib npaug rau lub vev xaib, yog li nws txoj kev siv yog txwv heev. I-beam yog cov khoom siv hlau feem ntau thiab cov khoom siv hlau feem ntau siv.
Yog li vim li cas I-beam flange thicker dua lub vev xaib?
Rau cov kab hlau steel, yog tias qhov siab-rau-thickness thiab dav-rau-dav qhov sib piv ntawm lub vev xaib thiab flange loj dhau, lub vev xaib thiab flange ntawm cov nqaj yuav deflect, ua rau kev ua haujlwm tsis zoo. Exhaustion ntawm lub zog los yog poob tag nrho stability. Lub zos instability ntawm lub beam yog ib tug raug nthwv dej buckling.
Nws yog tsim los ntawm cov txheej txheem kev siv tshuab thiab siv cov khoom siv tsawg kawg nkaus ntawm qhov chaw ua kom tau raws li qhov kev thauj khoom. Nws cov qauv muaj feem xyuam rau qhov siab ntawm lub vev xaib.
Cov ntaub ntawv hla ntu ntawm steel qauv nqaj thiab kab pheeb ces kaum muaj xws li "i, T, ⊥, L, Г, Π", thiab lwm yam. Nws suav nrog cov kab rov tav thiab ntsug. Cov kab ntsug yog hu ua webs vim tias lawv nyob ntawm lub duav thiab lub plab; cov tswvcuab transverse hu ua flanges, uas nyob deb ntawm lub centroid ntawm seem thiab muaj kev cuam tshuam zoo rau kev khoov ntawm cov tswvcuab. Yog li ntawd, flanges feem ntau siv nyob rau hauv steel ntau lawm. Yog li ntawd, nws yog tuab dua li lub vas.
Cov saum toj no yog vim li cas vim li cas I-beam flange yog tuab dua li lub vev xaib. Yog koj xav paub ntxiv, thov koj ua raws li GNEE.