| Project/Area Number |
05555125
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
構造工学・地震工学
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
NAGAI Masatsugu NAGAOKA UNIVERSITY OF TECHNOLOGY,CIVIL ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (20207971)
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| Co-Investigator(Kenkyū-buntansha) |
SATOH Masakatsu KAWASAKI STEEL CORPORATION,CIVIL ENGINEERING,ASSISTANT MANAGER, 鋼構造事業部, 部長補
SAKAI Fujikazu KAWASAKI HEAVY INDUSTRIES,LTD., CIVIL ENGINEERING,MANAGER, 鉄構事業部, 部長
SAKANO Masahiro KANSAI UNIVERSITY,CIVIL ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (50143201)
OKUI Yoshiaki SAITAMA UNIVERSITY,CIVIL ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (40214051)
YAMAGUCHI Hiroki SAITAMA UNIVERSITY,CIVIL ENGINEERING,PROFESSOR, 工学部, 教授 (50134474)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1994: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1993: ¥5,200,000 (Direct Cost: ¥5,200,000)
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| Keywords | CABLE-STAYED BRIDGES / LONG-SPAN BRIDGES / COMPOSITE GIRDERS / CABLES / FATIGUE / DURABILITY / DESIGN / DAMPING / 合成構造 / 新形式橋梁 / ケーブル振動 |
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| Research Abstract |
The main aim of this research project is to develop new cable-stayd bridge systems with lower construction cost and higher durability.
In foreign countries, cable-stayd 2-I composite girder bridges are used becase of their lower construction cost. However, their durability has not been examined. This is the main reason why this economical system has not been used in Japan so far.
In this study, first, utilizing the simplified method for obtaining the stress resultants of main members in cable-stayd bridges, the possibility of such system with a span up to 500 meteres is investigated from statical viewpoints, then the possibilities of them are presented. To examine the durability of the system, a 3D dynamic FEM analysisis developed which includes cable local vibration. Under vehicle loading, it is known that this system does not show peculiar behavior compared with dynamic behavior seen inconventional systems. Further, to cope with unexpected cable vibration, the effectivenessof the installation of viscous damping device and its design methos are presented.
Secondly, the structural behavior of a 2-I composite girder is studied. A FEM analysis is developed to obtain the stress in the composite girder in cable-stayd bridge, then the method to obtain the shear-lag in concrete slab is proposed. Creep and shrinkage analysis is also carried out and the impotrance of their phenomena is suggested. From FEM analysis, the effect of transvese-stiffening system on the 3-D structural characteris-tics of the 2-I girder bridge is investigated. From the calculation, the possibility of the simple transverse-stiffening system is obtained.
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