Igor Gukov - seminar.tvz.hrseminar.tvz.hr/materijali/materijali14/14A06.pdf · Drveni lukovi Most...
Transcript of Igor Gukov - seminar.tvz.hrseminar.tvz.hr/materijali/materijali14/14A06.pdf · Drveni lukovi Most...
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PROJEKTIRANJE I GRAĐENJE PROJEKTIRANJE I GRAĐENJE BETONSKIH LUKOVABETONSKIH LUKOVA
Igor Gukov
Lukovi od leda na Grenlandu.
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Most Fairy preko rijeke Buliu, Guangxi, Kina. Raspon luka 122m.
Landscape Arch, Utah, raspon luka 88m.
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Povijesni razvoj lučnih mostova
11. Kameni lukovi. Kameni lukovi22. Betonski lukovi. Betonski lukovi33. . ŽŽeljezni i eljezni i ččelieliččni lukovini lukovi44. Drveni lukovi. Drveni lukovi
1. Kameni lukovi
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Most Arkadiko u Grčkoj, 13.st p.n.e.
Raspon mosta: 1m, 22m duljine, 5.6m širine i 4m visine.
Most Pont Saint Martin, Italija 106.gRaspon luka L=35.4m
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Most Alcantara preko rijeke Tejo, Španjolska
Most Anji, Kina, 605. g., L=37.4m
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Vijadukt Landwasser, Švicarska, 1902.g., L=20m
Most Séjourné
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Most Wuchaohe, raspon luka 120m, 1990. godine
Most Shanxi Danhe, raspon luka 146m, 2001. godine.
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2. Betonski lukovi
Most Le Veurdre, Francuska. Rasponi: 67.5 – 72 – 67.5 m , 1910. godine
• Izvedba betonskih mostova započinje 1875. godine.• Početak dvadesetog stoljeća: Francois Hennebique,
Robert Maillart i Eugene Freyssinet
Most Arve, R.Maillart
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3. Željezni i čelični lukoviMost Iron, Engleska, 1779.g., L=30m
New River Gorge, West Virginia, SAD, 518 m
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4. Drveni lukovi
Most Kintai, Iwakuma, Japan, 1673.
Most Kintai, Iwakuma, Japan, 1673.
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Most Keystone-Wye, Južna Dakota iz 1967.
PjePješšaaččki most ki most AngleAngle Vale obnovljen Vale obnovljen 1988., Australija1988., Australija
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Most Ajoux, Francuska, 2001.g. L=20m
Drveni most, Pians, Austrija
Projektno rješenje
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Betonski lukoviRASPONI:• Između 50 i 300 m• Moguće i do 500 m
IDEALNI ZA:• Uvale, duboke kanjone, morske tjesnace • lukovi u svojim osloncima predaju znatne
horizontalne potiske te zahtijevaju dobru nosivost tla
UPETI LUK40 - 300 m
1
1 3
3
2
2presjeci 1-1 2-2 3-3
I > I ili I = konstantat p
ELASTICNO UPETI LUK40 - 150 m
DVOZGLOBNI LUK80 - 200 m
TROZGLOBNI LUK60-120 m
UPETI LUK S
80-200 m
LUCNI ZIDOVI (DISKOVI)40-100 m
UPUŠTENIM KOLNIKOM
SKICA SKLOPA STATIČKI SUSTAVOPTIMALNI RASPONI
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Poprečni presjek luka
Kontrola stabilnosti lukova
2
2 8y
Ki Ki
E I q LHL f
γ⋅ ⋅
= ⋅ =⋅
Kritična horizontalna sila izvijanja iznosi:
Koeficijent sigurnosti prema kritičnoj sili izvijanja: 3100λλγ = +
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Kontrola stabilnosti lukova
Prva tri tona dinamiPrva tri tona dinamiččkog kog proraproraččuna mosta Krkauna mosta Krka
ODREĐIVANJE OPTIMALNOG OBLIKA OSI LUKA
)1(1
−−
= kchm
fy ξ LEGAYEVA KATENOIDA
22
4 xLfy = PARABOLA
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SASTAVLJENE KRIVULJE (Séjourné):
Os luka
HIPERBOLA OBRNUTA LANČANICA
22y px kx= −2
x xp pp xy e e p ch
p
− ⎞⎛= + = ⋅⎟⎜⎜ ⎟
⎝ ⎠
( )21y Ax Bx Cx= − −
Odabir osi luka
Algoritam postupka metode obrnutog opterećenja: 1. Za odabran raspon luka L i strelicu f postavlja se početna krivulja, npr. parabola. 2. Izvodi se statički proračun za opterećenje nadlučnog sklopa i vlastite težine luka po teoriji
II reda. 3. Na početnu krivulju dodaju se tako dobiveni pomaci točaka i dobiva se nova geometrija
(rješenje 1). 4. Početna strelica luka korigira se faktorom ftr/ fiter. 5. Ponavljaju se koraci od 1 do 4 sve dok ftr /fiter≤ε. 6. Na osnovu koordinata točaka rješenja 1 određuje se polinom željenog stupnja koji
najbolje aproksimira točke u smislu da suma kvadrata odstupanja bude minimalna(rješenje 2).
7. Na osnovu koordinata točaka rješenja 1 postavlja se spline funkcija (rješenje 3). 8. Tako dobivene točke povezuju se potom standardnim linijskim elementima s opisanim
poprečnim presjekom luka i opterećuju u pravilnom smjeru.
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Os Skradinskog luka određena metodom obrnutog opterećenja
Maksimalno odstupanje točaka: 0.4% u odnosu na raspon luka.
Momentni dijagram za različite osi luka kod upete veze
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Momentni dijagram za različite osi luka kod zglobne veze
Momentni dijagram za različite osi luka kod zglobne veze
24.683509Parabola4.11.538910Katenoida3.10.033965Polinom 8. stupnja2.1.03396
Metoda obrnutogopterećenja1.
Koeficijent povećanja momenta
Moment(kNm)Os lukaRed.br.
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Proračun lukova
Postupci izvedbe lukova
1) Izvedba na skeli,
2) Konzolna izvedba,
3) Konzolna izvedba formiranjem rešetke,
4) Postupci zaokretanja luka,
5) Postupci koji koriste krutu armaturu,
6) Kombinirani postupci.
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Izvedba luka na skeli
Klasična drvena lepezasta skela
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Čelična skela sa stupcima:
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Most Gladesville, Sydney, Australia, 305 m
Izvedba mosta Gladesville
4 usporedna lukaod montažnih
odsječaka
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Izvedba mosta Gladesville, 1962.
Skela bez međuoslonaca
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Most Plougastel, Francuska,skela bez međuoslonaca
Izvedba mosta Plougastel, Francuska
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Most Plougastel, Francuska
Most Arrabida, Portugal
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Most Nosslach - trokatna drvena skela Cruciani
Konzolne izvedbe čeličnih lukova
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Začeci konzolnih izvedbi masivnih lukova:Freyssinet, Caracas - La Guaira, 1952.
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Most Caracas - La Guaira 1952. L=152m
Hrvatski lučni mostovi:Šibenik 1964.-1966., 246 mPag 1967.-1968. 193 mKrk 1976.-1980. 244 + 390 m
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Most Most ŠŠibenikibenik
• Izveden: 1966.• Raspon luka: 246 m• f/l = 1/8
Konzolne izvedbe jadranskih lukova:Šibenski most 1964.
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Šibenski most, 1966.g.,
PaPašški most, 1968.ki most, 1968.gg
Raspon luka: 193 mf/l = 1/7
AT CROWNAT SPRINGING
926
11.655 x 23,3
36.73
4 x 23,311.6546.60193.20
0.00
38.74 37.08
279.6
PaPašški most, 1968.ki most, 1968.
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Paški most, 1968.
11.655 x 23
36.73
4 x 2311.6546.60
193.20
0.00
38.74 37.08
KRK I♦ Raspon luka: 390 m♦ f/l = 1/6.5
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Most Krk I
Izvedba formiranjem privremene rešetke, Krčki most 1980.
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Izvedba formiranjem privremene rešetke, Krčki most 1980.
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Most Krk - postupna izvedba poprečnog presjeka luka
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Most Beppu Myouban, 1989.
Grosse Muhl, 1991.
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La Roche Bernard, 1994.
FRANCUSKI MOSTOVI SA SPREGNUTIM NADLUČNIM SKLOPOM:Rance, 1994.
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KONZOLNI POSTUPAKs kosim zategama i betoniranjem odsječaka
Kyll, Njemačka 1997.
Maslenica 1997.
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MASLENIČKI MOST, 1997., raspon luka: 200 m
fixed connection
fixed bearings(hinge)
longitudinallymovablebearingsbearings
movablelongitudinally
MOST MASLENICA
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copper sheet
cross girder
2cm cut
deck
pier
copper sheet
pier head
pier
maingirder
no bearing!
deck plate
girdermain
spaceoverlap
pier head
pier
(cro
ss g
irder
ove
rall
heig
ht)
KRK PAG, ŠIBENIK
MASLENICA
Greda mosta – Šibenik, Pag, Krk, Maslenica
MOST KRKA
Raspon luka: 204 m.
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Most Krka
Skradinski most preko rijeke Krke
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Skradinski most preko rijeke Krke
Most KrkaGreda spregnutog poprečnog presjeka
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Most Hoover Dam Bypass, 2010.
Most Hoover Dam Bypass
Raspon luka 320 m
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Most Hoover Dam Bypass
Mike O'Callaghan -Pat Tillman Memorial Bridge
Zakretanje lučnih polovica
- prve primjene: Morandi
- kasnije: jedan most većeg raspona (145m), Argentobel, lukovi betonirani na mjestu
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IZVEDBA ZAOKRETANJEM LUČNIH POLOVICA:Argentobel, Njemačka, 1985.
Zakretanje lučnih polovica
Carinski most preko Neretve u Mostaru, raspona 54 m. Poprečni presjek luka: sanduk s tri komore, Zakretanje polovica oko čeličnih zglobova.
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Carinski most preko Neretve u Mostaru
Kineski lukovi s krutom armaturom:čelične cijevi ispunjene betonom
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Most Wanxian
Izvedba luka mosta Wanxian:samonosiva rešetka od cijevnihprofila
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Most preko Krke u Skradinu, K. Tonković, 1955.
Stari čelični lučni sklop, raspona 90 m, iskorišten je najprije kao oplata za dva paralelna betonska lučna nosača, da bi po otpuštanju skele, bioaktiviran kao kruta armatura betonskih lukova
Most preko Krke u Skradinu, K. Tonković, 1955.
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TRAJNOST MOSTOVA
O
Problemi trajnosti - rekonstrukcija Paškog mosta
Defects found at an early age cannot be blamed primarily on theaggressive environment, but are attributed to conceptual design andnegligence on site.
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Ratna oštećenja Paškog mosta
Rekonstrukcija Paškog mosta2000.
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Nova greda Paškog mosta (1999. - 2000.)
O
TRAJNOST MOSTOVA
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Lukovi malih raspona od predgotovljenih dijelova
Montažni lučni nadvožnjaci
- autocesta Karlovac – Rijeka, dionica Donja Orehovica - Kikovica(1972.), tri svođena nadvožnjaka raspona 28 m (Hidroelektra)
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Montažni lučni nadvožnjaci
Prijelazi za životinje na autocesti
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Most Rip, Australija, raspon 183 m
Most Jiangjiehe, Kina, 1995.g.,L=330m
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Riccardo MorandiMost Paul Sauer, Južnoafrička republika, 1956.g. L=191m
Most Fausto Bisantis, Italija, 1962.g., L=231m
Višestruki lukoviMost Podoli, Češka, 1942.g., L=150m
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Most Hongxing, Kina, 1967.g, L=108.5m