Cov Roj Hmab Ua Si (Lrbs)Rau choj:
Lub ntsiab lus tshaj plaws thiab qhov sib txawv tseem ceeb los ntawm kev ua lag luam cais
Cov Roj Hmab Ua (LRBS)Yog qhov tseeb seismic kev rho tawm tau tsim los tso av qeeg - inducts hauv cov qauv. Tshwj xeeb engineered rau kev sib txuas tsheb loj, choj LRBES sib txawv los ntawm lawv lub tsev counterparts nyob rau hauv kev tsim, kev ua tau zoo, thiab daim ntawv thov, ua daim ntawv thov kom sib txawv xws liJT / T 822-2011(Suav teb) thiabKhoom 15129(Tebchaws Europe). Kab lus no qhia lawv cov yam ntxwv tseem ceeb thiab lub ntsiab lus tseem ceeb.
Peb Cov Khoom Lag Luam ntawm Lead Core Core Roj Hmab Bearings
I. Cov Qauv Tseem Ceeb thiab Ua Haujlwm
Tus chojLRBSMuaj kev hloov ntawm cov khaubncaws sab nraud ntawm cov roj hmab thiab cov hlau ua hlau, cov hlau nplaum, nrog ib lossis ntau cov hmoov txhuas coj los ua kom ntub dej. Cov thawj coj indegoes yas deformation thaum lub ntiaj teb, lub zog tawg thiab txo cov txheej txheem kev vibrations. Qhov kev tsim qauv no txo cov ntsug load - Cov kabmob muaj peev xwm nrog cov kab rov tav clearibility, qhov tseem ceeb rau cov neeg txuas ntxiv rau cov tsheb ciav hlau thiab cov kev ua si seismic.
Ii. Qhov sib txawv ntawm cov ris tsho ua kua
2.1 Load -} cov kabmob muaj peev xwm
Tus choj: Tsim rau ntau dua ntsug ntsug loads, nrog qhov muaj peev xwm tshaj plaws ntawm 16,000 kn (jt (jt (jt / t 822-2011), muab cov khoom tsim hluav taws xob hnyav thiab cov teeb tsa hnyav.
Tsev: Feem ntau coj cov kev ntxhov siab ntsug, nrog kev tsim kho ntawm compressive kev ntxhov siab feem ntau capped ntawm 15 MPa (JG /2018), muaj kev thauj khoom ntawm lub tsev.
2.2 Kev Ua Haujlwm
Qhov ntsuas kub ntau: ChojLRBSUa haujlwm nyob rau hauv cov kev mob hnyav, nrog kev ua siab ntev ntawm -25 Qib rau 60℃(JT / T 822-2011), tawm tsam huab cua. Tsev cais tawm (jg / t 118-2018) tsom rau -20℃rau 40 degree, nrog stricter damping kev ruaj khov uas yuav tsum muaj nyob rau hauv qhov chaw huab cua txias (± 40% hauv qab 0 degree).
Yam ruaj khov: Bridges xav tau kev tiv thaiv kom qaug zog los ntawm kev rov ua tsheb dua {{}}} ua rau kev vibrations. JT / T 822 {{{{}}}}}} 2011 Mandates 5,000 kab rov tav thauj mus los nrog tsawg dua lossis sib npaug / damping deadradation. Lub tsev cais kho kom meej txog 60-xyoo lub neej (JG / T 118-2018) nrog kev sim siab (80 teev) mus rau ib qho kev sim ncua ntev.
2.3 Khoom siv tshwj xeeb
KHIB HOM: Choj lrbsSiv cov roj hmab ntuj (JT / T 822-}}}} Tsev raug rho tawm suav nrog cov roj hmab muaj cov cua dub (HDR) nrog qis tensile lub zog (ntau dua los yog sib npaug rau 10 MPA)
Coj Purity: Ob qho tib si yuav tsum muaj ntau dua lossis sib npaug ntawm 99.99% Cov Ntawv Seev Daws Qhov Loj (GB / T 469)
2.4 Cov Duab Zoo thiab Kev Ua Haujlwm Txhua Yam
Cov duab coefficients:
Txuas hniav: Thawj hom duab zoo (s₁) =}}} thaj chaw zoo / pub dawb; Thib ob qhov zoo (s₂) =} Siv cov roj hmab zoo dua (JT / T 822-2011). S₁ Ranges 7-13, muaj qhov tsim nyog tshaj plaws ntawm kev ntseeg txog S₁ (piv txwv li, 12 MPa rau S₁ ntau dua lossis sib npaug rau 12).
Cov tsev: S₁ ntau dua los yog sib npaug rau 5 thiab muaj ntau dua lossis sib npaug nrog 4, piv txwv li, 20% txo rau s₂ {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}.
Tiffness thiab damping:
Kab rov tav sib npaug txhav:Choj lrbsCia ± 15% kev sib txawv (JT / T / T 822-2011), tib yam li lub tsev LRBS, tab sis Choj damping sib piv (≈%) yog ib nyuag siab dua vim yog cov khoom loj.
Cov kab rov tav deformation: Cov hniav rov tav yuav tsum muaj ntau dua lossis sib npaug nrog 300% tuab li 400%, ua ntej muaj peev xwm ua ntej tshaj tawm.
2.5 Kuaj thiab Cov Qauv
JT / T 822-2011 vs. JG / T 118-2018:
Kev kuaj choj suav nrog kev ruaj khov ruaj khov (3-12 MPA) thiab zaus ruaj khov (0.001-0.5 hz). Kev ntsuam xyuas lub tsev tsom rau qhov kub thiab txias-}}}}}}
En 15129 txoj kev sib ncag: Cov txheej txheem European qhia meej cov kev sim tsis sib xws (piv txwv li, 0.1-1.0 Hz Chaw thau khoom) thiab cov khoom siv shears, raws li kev sib koom ua ke ntawm lub cev.
2.6 installation thiab geometry
Qho loj: Choj LRBS muaj kev ua kom muaj kev ua kom muaj kev puas tsuaj rau cov teeb meem (1/400 ntawm luv (± 0.8-2.0 hli, jt / txog 822-2011) kom haum rau cov qauv kev sib txuas loj. Kev ua neeg raug cais tawm ntau dua yooj yim hauv cov kab sib tsoo.
Corrosion tiv thaiv: Choj steel Cheebtsam ua raws JT / T 722 rau hnyav {{1} Dosting anti {2} Cov tuam txhab corrosion, steel) nrog kev tiv thaiv yooj yim.
III. Ua raws li en 15129
Khoom 15129Teeb rau hauv ntiaj teb los ntawm cov seismic cais tawm, xav tau tus choj lrbs los ua kom pom:
Dynamic stiffness stability hla 0.1-5.0 Hz.
Qoob nkees tsis kam nyob rau hauv 2 lab thauj mus los thauj (vs . 5}, 000 hauv jt / t 822-2011).
Kev tiv thaiv hluav taws kub (R120 kev faib tawm), ib qho tseev kom muaj nyob hauv Suav cov qauv tab sis tseem ceeb rau cov neeg European.
Xaus:
Tus chojCov Roj Hmab Ua Siyog tshwj xeeb rau cov nra hnyav, chaw tsheb hnyav, thiab siv hluav taws xob hnyav {{ Tsis zoo li yog tsev cais tawm, uas ua ntej ntev {{2} deformation zoo li cov qauv zoo li jt /} Lub sij hawm zoo li kev sib txuas ntawm cov qauv sib txuas ntawm cov khoom siv seismic kev tsim kho.
