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Predecessor
Volume 46, Issue 12
Displaying 1-8 of 8 articles from this issue
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T. Maruya, J. Niwa2008 Volume 46 Issue 12 Pages 3-10
Published: December 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe recommendations for stainless steel bars in concrete were published in September 2008 from JSCE. The contents of the recommendations contain terminological definition for stainless steel bar, quality, design value and methods of verification on steel corrosion. Experimental results are shown especially about the feature of stainless steel bars, improvement of corrosion resistivity, with the result that the chloride threshold ion concentration of stainless steel bars is greater than that of carbon steel bars. In addition, the following matters as an important reminder are described, those are general structural details, construction and inspection for stainless steel bars.View full abstractDownload PDF (16924K) -
K. Teranishi2008 Volume 46 Issue 12 Pages 11-19
Published: December 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSIn this paper, the factors affecting the drying shrinkage of concrete were considered based on the composite theory, and the experimental data examining the effects of various factors on the drying shrinkage of cement paste and aggregate were introduced. And it was shown that the regulation of water content in JASS 5 is not necessarily reasonable. In addition, it was described that the drying shrinkage strain of aggregate differs depending on locality and lot in addition to rock-type, and they are reflected directly in the drying shrinkage strain of concrete, then the prediction equation of drying shrinkage to be able to consider the effect of aggregate properties is useful in order to control such variation, furthermore the quality control and inspection of drying shrinkage of aggregate becomes important in the future.View full abstractDownload PDF (1738K) -
T. Nakagawa, S. Hatanaka, N. Mishima, T. Matsumura2008 Volume 46 Issue 12 Pages 20-27
Published: December 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSPorous concrete is a concrete with large amount of continuous pores that have been intentionally inserted; it belongs to a completely different category from conventional concrete. Therefore the physical characteristics of porous concrete differ greatly from normal concrete in its properties, such as permeability, water retention, water purification, being a vegetation base, functioning as a habitat for organisms, etc. It is a material that has great potential to be used widely in both civil engineering and architecture in the future. In the present study, a new type of double-layer porous concrete pavement is proposed to provide comfortable circumstances around houses. The pavement consists of the base layer of conventional porous concrete and the surface layer of color small pebbles bound by epoxy resin. A site experiment was carried out in front of the school building of the architectural department in Mie University. It has been confirmed that the proposed pavement method is quite effective to realize a safe and beautiful walking way.View full abstractDownload PDF (41621K) -
H. Kumagai, H. Nakazawa2008 Volume 46 Issue 12 Pages 28-34
Published: December 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSIn this report, the simplified method to calculate the deformation at flexural yielding is investigated, which can be applicable to RC members with high strength materials. For the columns under high axial compression, moment vs. curvature relationship should be calculated with analysis based on linear strain distribution over the depth, because compressive yielding may occur prior to tensile yielding. Deformation at flexural yielding of the beam is considerably affected by slip-out of longitudinal reinforcements, but its influence is small in the column.View full abstractDownload PDF (933K) -
K. Rokugo, H. Hatano, N. Banthia2008 Volume 46 Issue 12 Pages 35-41
Published: December 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe outline of the report of the commission of inquiry concerning the collapse of the “de la Concorde overpass” was described here. This concrete bridge was constructed in 1971 in the suburbs of Montreal in Canada and collapsed on September 30, 2006. The total length and the width were 61. 8 m and 27. 4 m, respectively. Twenty PC hollow girders (27. 4 m) rested on beam seats located at the ends of the cantilevers of the abutments, directly under the expansion joints. The improper rebar detailing during design, the improper rebar installation at the time of construction, and the low quality concrete used for the abutments are pointed out as the principal physical causes. The lack of shear reinforcement in the thick slab, the absence of an adequate protection of the thick slab against water, and the damage caused during the repair work are mentioned as the contributing physical causes. Wide-ranging recommendations to prevent similar accidents are described.View full abstractDownload PDF (30624K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2008 Volume 46 Issue 12 Pages 43-49
Published: December 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESS -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2008 Volume 46 Issue 12 Pages 50-55
Published: December 01, 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESS -
2008 Volume 46 Issue 12 Pages 55
Published: 2008
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESS
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