SivQ420Dsteel kom ua tiav lub teeb yuag tsim nyob rau hauv siab -nce vaj tse yog ib daim ntawv thov classic ntawm "siab-lub zog steel" lub tswv yim. Lub hauv paus ntsiab lus tseem ceeb yog: Siv cov khoom siv zog siab dua tso cai rau me me hla- ntu kom nqa tib lub nra, yog li txo qhov hnyav tag nrho ntawm cov qauv.
Nov yog cov ncauj lus kom ntxaws txog yuav ua li cas Q420D ua kom lub teeb yuag, nrog rau cov kev xav tseem ceeb:
1. Core Mechanism: Strength -rau -Weight Ratio
Q420D vs Common Steel:Piv nrog rau Q355 steel siv dav, Q420D muaj qhov tsawg kawg nkaus yield zog ntawm 420 MPa (vs . 355 MPa), nce li ntawm 18%. Qhov no txhais tau hais tias rau tib lub zog, qhov yuav tsum tau muaj tus ntoo khaub lig- ntu ntu ntawm tus tswv cuab (xws li kab los yog kab) tuaj yeem raug txo.
Direct yuag:Cov ntoo khaub lig me me- ntu ncaj qha txhais mus rau tsawg dua steel tonnage siv hauv cov tswv cuab.
2. Cov chaw siv tseem ceeb rau kev sib tw
Mega Columns thiab Core Tube Phab Ntsa:Hauv cov tsev siab siab- nce siab, lub ntiajteb txawj nqus thiab cua / av qeeg sib sau ua ke rau hauv cov kab loj thiab cov phab ntsa tseem ceeb. Siv Q420D ntawm no yog qhov zoo tshaj plaws. Txo lawv tus ntoo khaub lig- thaj tsam ntu:
Txuag cov khoom tseem ceeb.
Ua kom siv tau hauv pem teb (ntau qhov chaw xauj tsev / muag tau), uas yog tus tsav tsheb loj.
Txo cov hneev taw ntawm cov qauv tsim.
Hnyav Hloov Girders / Trusses: Ntawm cov khoom siv hauv pem teb lossis podium theem uas cov kab yuav tsum tau hloov mus, cov girders no nqa cov khoom loj. Siv Q420D tso cai rau kev hloov pauv hauv qhov tob tob, txuag cov khoom thiab muaj peev xwm txo cov dab neeg qhov siab.
Outrigger Trusses thiab Belt Trusses: Cov khoom tseem ceeb hauv kev thauj khoom sab nraud- tawm tsam cov tshuab. Kev siv siab - steel zog ua rau cov tshuab no ua haujlwm zoo dua thiab sib dua.
Ntev -Span Floor Beams: Qhov twg sab - qhov chaw dawb yog xav tau, siv Q420D rau loj -span beams tuaj yeem txo lawv qhov tob, ua rau qis hauv pem teb - mus rau - pem teb qhov siab thiab tag nrho lub tsev qhov hnyav.
3. Cov nyhuv Cascade ntawm lub teeb yuag
Txo qhov hnyav ntawm cov tswv cuab hauv cov qauv tsim muaj txiaj ntsig zoo li cascading:
Txo lub ntiajteb txawj nqus Load: Lub teeb sab sauv txhais tau hais tias qis axial loads ntawm txhua kab thiab phab ntsa hauv cov plag tsev. Qhov no tso cai rau cov tswvcuab qis dua tuaj yeem ua kom zoo dua qub, tsim kom muaj qhov hnyav sib xyaw ua ke- txuag cov nyhuv hauv lub tsev qhov siab.
Txo seismic pawg: Lub zog inertial thaum muaj av qeeg yog proportional rau lub tsev loj. Lub tsev sib zog ua rau muaj kev xav tau seismic qis dua, tso cai rau lub zog me me thiab kev lag luam ntau dua rau sab nraud- tawm tsam cov tshuab (cov hlua khi, cov phab ntsa shear). Qhov no yog qhov zoo tshaj plaws hauv thaj chaw seismic.
Txo Foundation Load: Tag nrho qhov hnyav xa mus rau lub hauv paus yog qis dua. Qhov no tuaj yeem ua rau lub hauv paus me me, tsis tshua muaj nqi (piv txwv li, tsawg dua los yog cov pawg me me, cov kaus mom me me, lub hauv paus thinner lev).
4. Khoom siv thiab kev ua tau zoo ntawm Q420D
Tuav Toughness (The "D" Qib): Qhov "D" txhais tau hais tias nws tau lees tias muaj kev cuam tshuam toughness ntawm -20 degree. Qhov no ua kom zoo ductility thiab tawg tsis kam, uas yog ib qho tseem ceeb rau seismic kev ua tau zoo thiab tag nrho cov qauv kev nyab xeeb, txawm tias nrog txo qis.
Weldability: Txawm hais tias nws cov pa sib npaug siab dua Q355, Q420D tseem tsim los ua vuam nrog cov txheej txheem tsim nyog (ua ntej- cua sov, cov hlau tsim nyog, tswj cov cua sov). Qhov no tso cai rau kev tsim kho kom muaj zog, kev sib txuas monolithic.
5. Kev tsim thiab kev tsim kho tseem ceeb
Nyuaj-Triven vs. Strength- Tsav Tsim: Feem ntau, tshwj xeeb tshaj yog nyob rau hauv cov tsev siab, qhov loj ntawm cov tswv cuab yog tswj hwm los ntawm deflection txwv, drift limits (sab laug stiffness), los yog stability es tsis muaj zog ntshiab. Yog tias tus tswvcuab qhov loj me tau hais los ntawm kev nruj, tsuas yog siv lub zog siab dua steel (Q420D) yuav tsis tso cai rau kev txo qis. Nws cov txiaj ntsig yog ua kom muaj zog ntau tshaj -cov ntsiab lus tswj hwm (xws li thauj khoom hnyav, kab luv).
Local Buckling: Siv cov seem thinner (phaj) los txo qhov hnyav ua rau muaj kev pheej hmoo ntawm cov buckling hauv zos (buckling ntawm cov phaj phaj ntawm kab lossis kab). Cov neeg tsim qauv yuav tsum xyuas kom meej qhov dav - mus rau - thickness ratios raws li cov cai yuav tsum tau rau siab - lub zog steel.
Kev Sib Txuas Tsim: Cov quab yuam yog tsom rau ntawm kev sib txuas. Lub zog steel siab dua yuav tsum tau ua tib zoo tsim kev sib txuas kom ntseeg tau tias txoj kev thauj khoom tsis cuam tshuam. Qee zaum, kev sib txuas yuav tsum tau txhawb nqa hauv zos.
Tus nqi -Kev Tshawb Fawb Cov txiaj ntsig: Q420D kim dua ib tuj dua Q355. Economic justification yog los ntawm:
Tag nrho qhov hnyav txuag.
Ntxiv qhov chaw siv tau.
Txuag nyob rau hauv lub hauv paus thiab tej zaum seismic systems.
erection ceev dua vim tuav cov khoom me me.
Kev kawm paub txog tus nqi engineering yog qhov tseem ceeb.
Summary : Txoj Kev Teeb Meem Nrog Q420D
Txheeb xyuas qhov muaj zog-Cov tswv cuab tswj hwm: Tsom ntsoov rau daim ntawv thov ntawm cov khoom hnyav tshaj plaws (mega-kem, hloov cov qauv).
Optimize Hla-Sections: Txo cov phaj tuab thiab cov tswv cuab qhov ntau thiab tsawg thaum ntsib lub zog, ruaj khov (tiv thaiv-buckling), thiab qhov yuav tsum tau ua kom nruj.
Leverage Cascade Effect: Re- tshuaj xyuas tag nrho cov qauv nrog txo cov neeg tuag kom txo qis kev txhawb nqa cov tswv cuab thiab cov hauv paus.
Xyuas kom muaj kev tsim kho: nthuav dav kev sib txuas thiab cov txheej txheem vuam rau ntau dua - cov khoom siv zog.
Validate Economically: Sib npaug cov ntaub ntawv nqi tiv thaiv kev txuag hauv qhov hnyav, qhov chaw, thiab cov nqi hauv paus.
Hauv kev xaus,Q420D yog ib qho cuab yeej muaj zog rau cov kws tsim qauv tsim kom nrhiav tau lub teeb yuag, siv tau zoo, thiab kev tsim qauv tsim hauv siab - nce siab. Nws daim ntawv thov ua tiav yuav tsum muaj kev sib koom ua haujlwm ntawm cov ntaub ntawv tshawb fawb, kev tsim qauv, thiab kev tsim kho engineering kom paub txog nws cov txiaj ntsig.