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The main section o the Russky Island Bridgeis a 2-tower cable-stayed bridge, main span1104 m. This is the new world record amongcable-stayed bridges [3]; the previous recordbelonged to the Sutong Bridge in China,span 1088 m, dated 2008 [4]. There are ap-proach bridges at both ends o the cable-stayed bridge section o the Russky Bridge,as appears in the attached longitudinal pro-fle.

The shape o the both slender concretetowers resembles a narrow-A, height 321m. This is the new world record among all

bridge types [5]; the previous tower record306 m belonged to the aore mentioned Su-tong Bridge [4]. The tower wall thickness othe Russky Bridge tapers upwards, being 2,0m at base slab, 75 cm at top [5]. The towerlegs are connected by three transverse cross-beams, one under the deck, two betweenthe deck and the top.

Along the main span, the bridge deckshape is a round-edged steel box girder, totalwidth 29,5 m, width between railings 26,0m, depth 3,2 m. The bridge accommodates4 trafc lanes 3,75 m, 2 lanes to each di-

rection. The vertical clearance at main span isnotably high, 70 m. The cable stays are locat-ed at both edges o the bridge deck, shortest181 m, longest 578 m, the latter being long-est among all cable-stayed bridges [6].

The client o the bridge is the FederalState Institution Directorate o the Feder-al Road Agency in Vladivostok, main con-tractor USK Most, consultant NPO Mosto-vik [6], the project supervisor being JSC In-stitute Stroiproject [1]. The bridge was builtduring 2008-2012, at a cost o 1 milliard dol-lars (USD) [7].

The Russky Island Bridgeworld record cable-stayed bridge in Russia

Vladivostok town is situated in the Far East o Russia on the coast o thePacifc Ocean, near the border between Russia and North Korea, op-posite to Sapporo town in Japan. In Vladivostok, there is a great bridgeacross the Eastern Bosphorus Strait to the Russky Island, Re. [1-2].

Summary in Finnish:

Vladivostokin kaupunki sijaitseeVenjn kaukoidss Tyynen-meren rannalla, lhell Kiinan jaPohjois-Korean rajaa, vastaptjapanilaista Sapporon kaupunkia.Vladivostokin ja sen edustallasijaitsevan Russky Island -nimisensaaren vlille It-Bosporinsalmen(Eastern Bosphorus Strait) ylitse ra-kennettiin suuri silta v. 2008-2012[1-2]. Jnnevliltn 1104 m se on

maailman pisin vinokysisilta [3].Edellinen enntyssilta on Kiinas-sa v. 2008 valmistunut Sutonginvinokysisilta (jv. 1088 m) [4].

Tower under construction.

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General view of the Russky Island Bridge.

Reerences:

[1] Inormation and illustrations kindly given by JSC Institute Stroiproject.[2] Construction o a cable-stayed bridge to the Russky Island across the Eastern Bosphorus Strait in Vladivostok. Newsletter on Long-Span BridgesHSBE, No. 43 (Jan. 2011), p. 3.[3] Bridge tables o the Helsinki University o Technology, www.bridge.aalto.f/en/longspan.html

[4] Juhani Virola: Los puentes atirantados de mayor vano del mundo. Revista de la Asociacin de Ingenieros del Uruguay AIU, N. 53 (Diciembre de2006), p. 17-20.[5] Tallest towers challenge ormwork designers. Bridge Design & Engineering 2010:4, p. 70.[6] Helena Russell: Russias world-record breaking bridge makes progress. Bridge Design & Engineering 2010:3, p. 7.[7] Russian president signs bridge degree. Bridgeweb, Bridge Design & Engineering 2008-09-04.

The leading 10 long-span cable-stayed bridges [3]

No. Bridge Span Location Year

1 Russky 1104 m Vladivostok, Russia 20122 Sutong 1088 m Suzhou-Nantong, China 20083 Stonecutters 1018 m Hong Kong, China 20094 Edong 926 m Hubei, China 20095 Tatara 890 m Onomichi-Imabari, Japan 19996 Pont de Normandie 856 m Le Havre, France 19957 Jiuliang 818 m Hubei, China 2012

8 Jiangsha 816 m Hubei, China 20099 Incheon 800 m Incheon-Songdo, South Korea 200910 Zoloty Rog 737 m Vladivostok, Russia 2011

Approach bridge under construction.

Author: Juhani Virola, Eur Ing-FEANIImages: JSC Institute Stroiproject