Concrete Journal

Biaxial Flexural Strength and Shear Strength of Reinforced Concrete Columns

Takayuki Shimazu

1983Volume 21Issue 9 Pages 15-24
Published: September 01, 1983
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.21.9_15

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There have so far been several experimental studies done mostly in Japan during the last decade on the reinforced concrete columns subjected to biaxial bending and shear. Most of the studies have been initiated in the light of various buildings damages due to recent destructive earthquakes. The aim of this paper is to review these investigations and to propose the equations for evaluating the biaxial flexural strength and shear strength, through the analyses of these test results.

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A Review of Current Research on Concrete Structures under Impulsive Loading

Manabu Fujii, Ayaho Miyamoto

1983Volume 21Issue 9 Pages 25-36
Published: September 01, 1983
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.21.9_25

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This paper presents the state of the art of current research on the behavior of reinforced concrete and prestressed concrete structures under impulsive loading (soft impact) and development on the method of improvement of impact resistance. The certain directions in future research on the concrete structures under impulsive loading are shown in the last part of the paper standing on the present situation.

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The Effect of Microstructural Change in Cement Paste on Creep of Concrete Due to the Advance of Hydration

Shingo Seki, Makoto Kawasumi, Kiyoshi Kasahara, Takeo Kuriyama

1983Volume 21Issue 9 Pages 37-52
Published: September 01, 1983
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.21.9_37

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A creep model of the microstructure of cement paste is presented, taking into account the process of cement hydration. The utility of the model for advancing the understanding of various creep phenomena within one explanatory frame work, and the ability of the model to give general expression to creep data are demonstrated.

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Large-Scaled Shotcrete Lining in the Deep Cavern at the Imaichi Underground Power Station

Yoichi Mimaki

1983Volume 21Issue 9 Pages 53-59
Published: September 01, 1983
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.21.9_53

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Tokyo Electric Power Company is now consturcting the Imaichi Underground Power Station with the cross section area of 1420m². In the design of the power cavern, the horse-shoe shape section is adopted to avoid the stress concentration at the stage of opening induced by high initial rock pressure more than 100kg/cm². Rock anchoring, rock bolting and shotcreting, conventionally used for temporary works, are also utilized as the permanent supporting system on the basis of the NATM concept. This paper describes the outline of the design and construction of shotcreting.

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[title in Japanese]

[in Japanese]

1983Volume 21Issue 9 Pages 77-82
Published: September 01, 1983
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.21.9_77

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[title in Japanese]

[in Japanese]

1983Volume 21Issue 9 Pages 94-96
Published: September 01, 1983
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.21.9_94

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese]

1983Volume 21Issue 9 Pages 115-124
Published: September 01, 1983
Released on J-STAGE: April 26, 2013

DOIhttps://doi.org/10.3151/coj1975.21.9_115

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