qhia txog cov khoom
Lub thawv steel girder yog tsim los ntawm cov phaj saum toj kawg nkaus, hauv qab phaj, lub vev xaib, kev faib ua ntu ntu thiab cov kab ntev thiab cov kab sib txuas. Nws feem ntau siv cov ntawv hla ntu muaj xws li ib lub thawv ib chav, ib lub thawv peb chav, ob lub thawv ib chav, peb lub thawv ib chav, Multi-box ib chav, inverted trapezoid nrog inclined webs, ib lub thawv ntau chav nrog ntau tshaj. 3 webs, ca steel lub thawv girder, thiab lwm yam. Ntawm lawv, feem ntau siv steel kem girder seem yog ob-lub thawv ib-chamber, thiab ntau lub thawv ib-chamber yog siv rau cov txuas hniav nrog cov choj dav dav. Pav ca steel lub thawv girder muaj qhov sib piv me me ntawm qhov siab ntawm qhov siab rau kab dav, thiab feem ntau yog siv rau ribbed beams xws li kev ncua txuas hniav, cable-nyob txuas hniav, thiab arch txuas hniav. Nws yog tsis tshua muaj siv nyob rau hauv beam choj. Ib lub thawv ntau lub thawv steel girder nrog ntau dua 3 webs tsis yooj yim rau kev tsim thiab nruab, yog li nws tsis tshua siv.
Nws tau muab faib ua ob peb ntu ntu rau kev tsim khoom thiab kev teeb tsa, thiab nws cov ntu ntu muaj cov yam ntxwv ntawm cov duab dav thiab tiaj tus, thiab qhov sib piv mus txog li 1:10. Steel kem girder feem ntau yog tsim los ntawm tag nrho cov welding saum phaj, hauv qab phaj, web, thiab transverse partitions, longitudinal partitions thiab stiffeners. Cov phaj saum toj kawg nkaus yog lub lawj orthotropic uas tsim los ntawm cov phaj npog thiab longitudinal stiffeners. Lub thickness ntawm txhua phaj ntawm ib tug raug steel lub thawv girder yuav ua tau: npog thickness 14 hli, longitudinal U-shaped tav thickness 6 hli, lub qhov ncauj sab sauv dav 320 hli, lub qhov ncauj dav dav 170 hli, qhov siab 260 hli, sib nrug 620 hli; hauv qab phaj thickness 10mm, longitudinal U-puab stiffeners; Lub thickness ntawm lub web inclined yog 14 hli, lub thickness ntawm nruab nrab web yog 9 hli; qhov sib nrug ntawm qhov sib tshooj yog 4.0m, thiab lub thickness yog 12 hli; Qhov siab ntawm lub beam yog 2-3.5 m.
Khoom zoo
1. Lub teeb yuag thiab cov khoom txuag
2. Khoov thiab torsional rigidity yog loj
3. Kev teeb tsa yooj yim, tus nqi qis, lub voj voog luv
4. Guaranteed zoo thiab kom muaj nuj nqis, thiab kev ntseeg siab.
5. Kev tsim kho kev ua haujlwm siab thiab kev nyab xeeb siab
6. Siv dav
Cov khoom siv
Vim nws cov qauv tsim, steel kem girder feem ntau yog siv rau hauv nroog elevated thiab ramp steel box girder; kev tsim kho lub sij hawm tsheb thauj neeg lub koom haum ntev-ntev cable-nyob choj, ncua kev kawm ntawv choj, koov choj stiffening girder thiab cov neeg taug kev choj steel lub thawv girder.
