Kev Taw Qhia Thiab Kev Txhim Kho Ntawm Cov Txuas Hlau Hlau

Cov choj hlau yog cov choj uas siv hlau ua cov khoom siv tseem ceeb. Nws muaj cov yam ntxwv ntawm lub zog siab thiab nruj, thiab tuaj yeem txo cov nqaj qhov siab thiab nws tus kheej qhov hnyav piv rau cov pob zeb ua vaj tse.
Taw qhia
Vim yog cov isotropy, kev ntxhib los mos zoo nkauj thiab loj elastic modulus ntawm cov hlau, cov kev ua haujlwm ntawm tus choj tau zoo dua nrog cov kev xav ntawm kev suav. Tsis tas li ntawd, steel choj feem ntau yog prefabricated nyob rau hauv lub Hoobkas thiab spliced ​​ntawm qhov chaw tsim kho. Lub sijhawm tsim kho yog luv, yooj yim rau kev ua haujlwm thiab tsis cuam tshuam rau lub caij. . Txawm li cas los xij, cov txuas hlau steel tsis muaj hluav taws kub tsis zoo thiab kev tiv thaiv corrosion, thiab yuav tsum tau tshuaj xyuas ntau zaus, kho, thiab cov nqi tu siab.
txhim kho
Ib tug steel choj yog ib tug choj uas nws span qauv yog ua los ntawm steel. Xyoo 1874, Tebchaws Meskas tau tsim lub ntiaj teb thawj tus choj loj loj ntawm Mississippi River, St. Louis Steel Arch Choj. Tom qab Tsov Rog Ntiaj Teb Zaum II, steel choj kev tshawb fawb thiab thev naus laus zis tau txhim kho nyob rau hauv smelting ntawm high-strength thiab high-zoo steel thiab kev txhim kho ntawm vuam technology. Daim ntawv thov ntawm orthotropic steel choj decks thiab high-strength bolts, raws li zoo raws li kev sib txawv ntawm cov yam ntxwv hom, tau ua tau zoo, prompting lub dav saws los ntawm ntev-span steel txuas hniav. Vim muaj lub zog siab thiab kev ua tau zoo dua ntawm cov hlau, thiab qhov sib piv me me ntawm qhov ceev thiab kev ntxhov siab uas muaj kev ntxhov siab, steel choj muaj peev xwm ntau dua. Kev tsim khoom ntawm steel choj Cheebtsam yog tsim nyog rau industrialization. Nws yog ib qho yooj yim rau kev thauj thiab nruab, muaj lub sijhawm luv erection, thiab yooj yim kho thiab hloov tom qab kev puas tsuaj. Txawm li cas los xij, steel yog yooj yim rau xeb thiab kev saib xyuas yog qhov nyuaj.