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Predecessor
Volume 29, Issue 6
Displaying 1-8 of 8 articles from this issue
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Shoji Ikeda1991 Volume 29 Issue 6 Pages 4-12
Published: June 01, 1991
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSComposite steel concrete girder bridges, steel reinforced concrete structures, composite columns, etc. have been widely used in Japan. However, entirely new composite structures or hybrid structures have appeared as a result of pursueing rationalization of design and construction. Application of steel elements in concrete arch bridges as a purpose of erection, concrete structures having a cross section including steel web plates, or mixed structures unified with concrete structures and steel structures are examples of such new structures. This paper discribes the trend of above mentioned new structures as well as reviews the basic matters of the development of composite structures and hybrid structures. Progress of materials such as fiber reinforced plastics is also described in relation to composite and hybrid structures.View full abstractDownload PDF (1516K) -
Yasuo Tanigawa, Yoshiaki Fukugawa1991 Volume 29 Issue 6 Pages 13-21
Published: June 01, 1991
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSRecently several accidents caused by delamination and falling of finishing materials such as tiles and mortar have occurred in a few cities in Japan. Finishing materials for concrete buildings have been occasionally considered to be maintenance-free, but it is pointed out that the maintenance is very important for not only concrete itself but also finishing materials. This report describes the state of the art on diagnostics and repair methods for the deterioration of external walls of reinforced concrete buildings.View full abstractDownload PDF (1394K) -
--Sakane Road, Route 314--S. Sugahara, S. Mayama1991 Volume 29 Issue 6 Pages 22-34
Published: June 01, 1991
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDouble loops alignment composed of bridges and tunnels is planned to match the steep topographic condition of 170 meters altitude difference. This is an unique structure in Japan. Under this topographic condition, the first challenging structures in Japan, such as prestressed concrete curved bridge (the minimum radius of the road curve is 120 meters) by cantilever erection and batter deep pile foundation by NATM, were introduced. Together with these, many new construction methods and ideas, like RöRo staging for the construction of cross deam of the pier, tieback cantilever method for an erection of trussed arch bridge, pretensioned cable truss (PCT) staging as a hanged staging, I -shape steel grating floor slab, etc., were used. This Report is a summary about planning of this double loops structure and construction procedures of the principal bridges.View full abstractDownload PDF (2336K) -
M. Hirose, J. Kiyohara, Y. Maeda, Y. Sakai1991 Volume 29 Issue 6 Pages 35-45
Published: June 01, 1991
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe Kumamoto Port area has such very unique characteristics as the largest tidal level difference in Japan, very poor ground with soft clay deposited about 40m thick, and shallow and wide tidal flat. Therefore new technical developments are inevitably required to overcome these difficulties for economical and efficient port construction. This paper shows the summary of a new type of dike (breakwater) developed in this Port as one of such technical developments. This dike is designed to resist the external lateral force (waves) by short piles driven into the soft ground. As a result of long and energetic study, this type of dike which is suitable for use in a sea area with a soft bottom ground and relatively gentle waves, made no requirement of soil improvement 'possible. The construction cost of the dike is only about one-sixth that of the conventional gravity-type dike.View full abstractDownload PDF (1676K) -
--Procurement of Material and Quality Control--N. Ogawa, K. Matsuzawa, K. Takeya, K. Komai1991 Volume 29 Issue 6 Pages 46-55
Published: June 01, 1991
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThis report describes the outline about the construction of Meghna Bridge, the elevenspan prestressed concrete (PC) continuous-hinged rigid frame bridge, constructed in Bangladesh. This bridge is located at the place, where the Dhaka-Chittagong highway intersects Meghna River, and it will be the longest road bridge in this country. This project is characterized by the construction of the big PC bridge in the developing country conducted by Official Development Assistance (ODA) of Japan. Therefore the quality control of the local procurement materials, especially materials used for concrete i.e. cement and aggregate etc, and the progress control of work under peculiar natural conditions, were important.View full abstractDownload PDF (1892K) -
[in Japanese]1991 Volume 29 Issue 6 Pages 56-64
Published: June 01, 1991
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (1342K) -
[in Japanese]1991 Volume 29 Issue 6 Pages 65-71
Published: June 01, 1991
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (929K) -
1991 Volume 29 Issue 6 Pages 81-84
Published: June 01, 1991
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (709K)
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