Concrete Journal

Prediction of Shrinkage and Creep of Concrete

Kenji Sakata

1993 Volume 31 Issue 2 Pages 5-14
Published: February 01, 1993
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.31.2_5

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New prediction equations of shrinkage and creep of concrete were proposed. These prediction equations were derived by a statistical method on the basis of many experimental data by the author. The characteristics and applications of the new prediction equations by the author and other equations presented in the codes and references were discussed. The efficiency of these prediction equations were investigated through a number of experimental data by the author and in references.

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Design and Construction Technology Employed in the Composite Layered System for Construction of Moderately High-Rise Office Building

M. Kinoshita, S. Watanabe, T. Ieda, Y. Nishida

1993 Volume 31 Issue 2 Pages 15-26
Published: February 01, 1993
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.31.2_15

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This report describes the following for mid-size office buildings of about 30 m × 30 m with 2-story basements and 10 floors above ground (including a 1 floor penthouse), all of which are comprehensively integrated : adoption of a composite construction method that effectively combines the structural advantages of the components to satisfy design requirements, factory fabrication of building structures members to satisfy construction quality requirements, development of design construction technology to minimize the use of temporary materials at the site, and the results of implementation of the above. To economically provide a large amount of office space, a tube structure is adopted and a composite construction method using RC columns of PCa, structural steel beams and square sheath steel pile filled at their joints with cost-in-place concrete was developed. In addition, in light of recent trends in the construction industry (for example, the shortage of skilled workers, reduced working hours, demands for high quality, shorter construction periods, and improved productivity), production at the factory has been maximized and the on-site operations have been minimized.

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Design and Construction of High Accuracy Monorail Track Beams

-Tokyo monorail extension line construction-

T. Kobayashi, H. Oshima, K. Ota, Y. Saito

1993 Volume 31 Issue 2 Pages 27-37
Published: February 01, 1993
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.31.2_27

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As pneumatic tires are fitted on the running wheels used for a straddle-type monorail, this system enabled one to stable running on steep grades and sharp curves has proved suitable for mass transit. The standard structure of the track beam is prestressed concrete. On account of monorail running directly on the track beam, the function as by way of track is required on the production and construction-adjustment of track beams. A special molding system has been designed, enabling the manufacture of a variety of track shapes and according to the required accuracy. This report describes the technique to improve the accuracy as a track.

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[title in Japanese]

[in Japanese]

1993 Volume 31 Issue 2 Pages 56-63
Published: February 01, 1993
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.31.2_56

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[title in Japanese]

[in Japanese]

1993 Volume 31 Issue 2 Pages 65-70
Published: February 01, 1993
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.31.2_65

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