Video: Yuav ua li cas truss tuag load xam?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Thawj qhov uas yuav tsum tau ua yog txiav txim siab txog cov khaub ncaws thauj los ntawm tag nrho thauj (tag nrho hnyav ). 235 lbs ib. faib los ntawm 24-0-0 = 9.8 plf ntawm uniform thauj . Txij li thaum truss yog tiaj tus, peb tuaj yeem thov ib nrab ntawm cov khaub ncaws thauj toeach chord tus tswv cuab rau account rau qhov ntxiv tuag load ntawm ½ gypsum.
Ua raws li qhov no hauv kev xav, koj ua li cas suav cov khoom tuag?
Koj ua tau nrhiav pom tus tuag load per unitarea txij li qhov ceev ntawm cov pob zeb yog paub. Yog koj txaus siab rau nrhiav pom tag nrho tuag load on theslab, xwb nrhiav pom thaj tsam ntawm lub slab thiab muab nws sib npaug Tuag load ib square meter xwb xam. Tag nrho tuag load Luas = 375 x 24 = 9000 Kg. sau 9mt.
Tsis tas li ntawd, lub ru tsev tuag load yog dab tsi? Cov tuag load ntawm a yam asphalt-shingled, ntoo-framed lub ru tsev yog hais txog 15 phaus persquare ko taw.
Xav txog qhov no, qhov twg yog qhov load ntawm lub truss?
Hauv cov ntaub loaded los ntawm downward rog, cov tswv cuab nyob rau sab saum toj ("sab saum toj chord") nyob rau hauv compression thiab themembers raws hauv qab ("hauv qab chord") yog intension.
Cov cai ntawm statics
- yog sib npaug ntawm qhov loj;
- yog opposite nyob rau hauv kev coj; thiab.
- ua raws kab ntawm ob lub ntsiab lus.
Dab tsi yog qhov txawv ntawm cov khoom thauj khoom thiab cov khoom thauj tuag?
Nyob loads xa mus rau dynamic rog los ntawm kev nyob thiab npaj siv. Lawv sawv cev rau lub zog hloov pauv uas tuaj yeem txav mus los ntawm lub tsev lossis ua haujlwm ntawm cov txheej txheem tshwj xeeb. Tag nrho tuag ntxiv nyob loads sib npaug "gravity thauj "ntawm tus qauv. Butyet mas loads ua raws li vaj tse, thiab.
Pom zoo:
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