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.
Khoom zoo
(1) Lub teeb nyhav thiab cov khoom txuag. Steel kem girder txuas hniav tuaj yeem muab kev ua si tag nrho rau lub peev xwm thauj khoom ntawm cov hlau, txuag txog 20% ntawm cov ntaub ntawv steel piv rau steel truss txuas hniav nrog tib lub sijhawm. Tom qab cov txheej txheem sab sauv dhau los ua sib dua, tus nqi ntawm qhov qis kuj yuav raug txo.
(2) Khoov thiab torsional rigidity yog loj. Lub thawv steel girder txais yuav ib qho kev sib tw kaw, uas tuaj yeem muab ntau dua dabtsi yog khoov thiab torsion rigidity dua li lwm cov ntawv hla-sectional raws li cov khoom zoo tib yam. Nws yog qhov tshwj xeeb tshaj yog tsim rau cov txuas hniav nkhaus thiab ncaj steel lub thawv girder txuas hniav uas muaj cov khoom loj dua eccentric.
(3) Kev teeb tsa sai thiab kev saib xyuas yooj yim. Lub thawv steel girder tuaj yeem ua rau hauv chav tsev loj hauv lub Hoobkas kom txo tau qhov kev ua haujlwm ntawm qhov chaw sib txuas thiab xyuas kom meej qhov zoo ntawm installation thiab installation raug. Lub chamber yog lub kaw lus nrog cov qauv yooj yim, uas yooj yim rau kev pleev xim, tiv thaiv corrosion thiab xeb tiv thaiv, thiab tom qab phau ntawv tu.
(4) Ua rau kev txhim kho erection efficiency. Nrog rau kev nce qib ntawm cov khoom siv loj loj thiab erection thev naus laus zis, lub thawv girder yog tsim rau cov ntu loj erection lossis jacking, uas yog qhov zoo los txhim kho kev ua haujlwm ntawm erection thiab luv lub sijhawm siv.
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.
