’´‚‹­“x‘@ˆÛ•â‹­ƒRƒ“ƒNƒŠ[ƒg"ƒ_ƒNƒ^ƒ‹"‚ð“K—p‚µ‚½“¹˜H‹´‚ÌŠJ”­

ƒ_ƒNƒ^ƒ‹EƒRƒ“ƒNƒŠ[ƒg‡¬IŒ…‹´

‘åŒF Œõ–‚PE“c’† —ǍO–‚QEŠâí• ˆè•v–‚RE‘Š‰Y G‹I–‚S

’´‚‹­“x‘@ˆÛ•â‹­ƒRƒ“ƒNƒŠ[ƒgiUFCj‚Å‚ ‚é"ƒ_ƒNƒ^ƒ‹"‚́C’´‚‹­“xC‚x«C‚‘Ï‹vC‚—¬“®‚È‚Ç‚Ì—D‚ꂽ“Á«‚Æ‹¤‚ɁC•â‹­—p“S‹Ø‚ªˆêØ•s—v‚Æ‚¢‚¤‰æŠú“I‚È“Á’·‚ð—L‚µ‚Ä‚¢‚éBUFC‚Í‚»‚Ì—D‚ꂽÞ—¿“Á«‚É‚æ‚èC•à“¹‹´‚ւ̗̍pŽÀÑ‚ª‘“àŠO‚Å‘‚¦‚Ä‚«‚Ä‚¢‚邪C‘“à‚Å‚Ì“¹˜H‹´‚Ö‚Ì“K—pŽÀÑ‚Í‚È‚©‚Á‚½B–{Œ¤‹†‚ł̓_ƒNƒ^ƒ‹‚ðŽåŒ…‚ɁCƒRƒ“ƒNƒŠ[ƒg‚ð°”Å‚É“K—p‚µ‚½‡¬Œ…\‘¢‚Ì“¹˜H‹´‚ðŠJ”­‚µC‰ðÍ‚ƍډ׎ÀŒ±“™‚É‚æ‚èCÝŒv‚¨‚æ‚ÑŽ{H•û–@‚ðŠm—§‚µ‚½B‚³‚ç‚É–{‹Zp‚ðŽÀ‹´‚É“K—p‚µC‘“à‰‚ÌUFC“¹˜H‹´‚Å‚ ‚éu“Œ‹ãBŽ©“®ŽÔ“¹–k‹ãBJCT–x‰zCƒ‰ƒ“ƒv‹´v‚ðŠ®¬‚³‚¹CŽÀ‹´Ú‰×ŽÀŒ±‚É‚æ‚è\‘¢«”\‚ðŠm”F‚µ‚½B

ƒL[ƒ[ƒhF ƒ_ƒNƒ^ƒ‹C’´‚‹­“x‘@ˆÛ•â‹­ƒRƒ“ƒNƒŠ[ƒgC“¹˜H‹´CƒvƒŒƒXƒgƒŒƒXƒgƒRƒ“ƒNƒŠ[ƒg

–‚P ‹ZpƒZƒ“ƒ^[“y–Ø‹ZpŠJ”­•”ƒ_ƒNƒ^ƒ‹Ž–‹Æ„iŽº

–‚Q ‹ZpƒZƒ“ƒ^[“y–Ø‹ZpŠJ”­•”

–‚R “y–Ø–{•”“y–ؐ݌v•”

–‚S ‘ÛŽ–‹Æ–{•”‘Û“y–ØŽx“X“y–Ø•”

Road Bridge Constructed with Ductal (UFC)

Composite Bridge Constructed with Ductal Girders and a Conventional Concrete Deck Slab

Hikari OHKUMA *1, Yoshihiro TANAKA *2, Ikuo IWASAKI *3 and Hiroki AIURA *4

Ultra high strength Fiber reinforced Concrete (UFC) is marketed under the brand name of Ductal. Ductal has ultra high strength, durability, and fluidity. Structural members, in principle, can be designed without reinforcing bars. Although it has been used for footbridges due to its excellent material characteristics, it had not been applied to a road bridge in Japan. This paper describes the development of a composite bridge with Ductal girders and a conventional concrete deck slab. The design and construction method were developed through experiments and analyses. This technology was applied to the Horikoshi C Ramp Bridge, at the North-Kyushu Junction of the East-Kyushu Expressway. It was the first road bridge in Japan to be constructed using UFC. A load test confirmed the performance of the bridge.

Keywords: Ductal, ultra high strength fiber reinforced concrete, road bridge, prestressed concrete

*1 Ductal-Business Promotion Section, Civil Engineering Technology Development Department, Technology Center

*2 Civil Engineering Technology Development Department, Technology Center

*3 Civil Engineering Design Department, Civil Engineering Division

*4 Civil Engineering Department, International Civil Engineering Branch, International Division