Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
Search
Advanced search
OR
Browse
Search
Volume 47, Issue 6
Displaying 1-15 of 15 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Revision of JASS 5 Reinforced Concrete Work-2009 by Architectural Institute of Japan
    Y. Masuda, M. Abe
    2009 Volume 47 Issue 6 Pages 6_3-6_10
    Published: 2009
    Released on J-STAGE: March 27, 2012
    DOIhttps://doi.org/10.3151/coj.47.6_3
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Japanese Architectural Standard Specification (JASS) 5 Reinforced Concrete Work was revised and published by Architectural Institute of Japan in February 2009. This paper describes main revisions. Those contain newly developed techniques, environment conscious techniques such as eco-cement or recycled aggregate concrete, substantial inspection methods for cover thickness, durability oriented techniques such as 200 years housing, establishment of quality standards on drying shrinkage and Young's modulus, and correcting value for compensating the strength of concrete in structures. As for specially specified concrete, stipulations were improved for engineers to use practically.
    View full abstract
    Download PDF (5615K)
  • The Circumstances of Risk Management for Concrete Structures
    S. Ushijima, Y. Yamamoto
    2009 Volume 47 Issue 6 Pages 6_11-6_18
    Published: 2009
    Released on J-STAGE: March 27, 2012
    DOIhttps://doi.org/10.3151/coj.47.6_11
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    As the general demands for product liability pervade, designers and constructors of concrete structures are expected to take more responsibility than ever on the performance and other related matters of their structures during their service life. Proper means or systems will be necessary for them to overcome this difficulty in a reasonable way.
    This article introduces some main contents of the reports of original investigation conducted by JCI Technical Committee on Risk Management of Concrete Structures, in which an attempt was made to apply the concept of risk management to all stages of construction work starting from its planning to maintenance of concrete structures. Also introduced are the results of risk assessment made for the execution stage of various concrete structures such as bridge superstructures, bridge substructures, condominiums of ordinary stories and box culverts.
    View full abstract
    Download PDF (5992K)
  • Seeking for the Existed Bamboo-Reinforced Concrete Buildings—Investigation of Concrete Arch Bridges in Oguni Town, Kumamoto Prefecture—
    T. Tamai, H. Kasami
    2009 Volume 47 Issue 6 Pages 6_19-6_27
    Published: 2009
    Released on J-STAGE: March 27, 2012
    DOIhttps://doi.org/10.3151/coj.47.6_19
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Although many legends are heard in Japan that there are buildings in which bamboo-reinforced concrete was used, only a few of them exist and have been confirmed by investigation. This report is the result of investigation of concrete arch bridges in which bamboo is said to be used. As a result of the investigation, bamboo could be confirmed with core specimen through visual inspection.
    View full abstract
    Download PDF (6721K)
  • Research on Repair Method of Deteriorated Reinforced Concrete Structure
    T. Hoshino, Y. Matsubayashi, K. Toda, T. Uomoto
    2009 Volume 47 Issue 6 Pages 6_28-6_35
    Published: 2009
    Released on J-STAGE: March 27, 2012
    DOIhttps://doi.org/10.3151/coj.47.6_28
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Recently, there have been many reported cases of early re-deterioration occurring in partially-repaired concrete structures. In order to clarify the mechanism causing this phenomenon, the deterioration of reinforced concrete specimens under salt attack was simulated and then remedial maintenance operations such as section restoration and surface coating was performed. After maintenance, the specimens were then exposed to both inland and marine conditions, and various experiments and measurements were conducted to clarify the mechanism of re-deterioration. This paper reports the results from 5 year, continually exposed specimens as part of a collaborative research project.
    View full abstract
    Download PDF (5982K)
  • Application of the Mechanical Anchorage Method to Structural Frames
    K. Kotera, S. Noda, A. Yamazaki, K. Hashimoto
    2009 Volume 47 Issue 6 Pages 6_36-6_44
    Published: 2009
    Released on J-STAGE: March 27, 2012
    DOIhttps://doi.org/10.3151/coj.47.6_36
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The Mechanical Anchorage Method is a technique to mechanically anchor deformed bars or screw reinforcing bars to concrete in the following two methods; 1. Connect screw reinforcing bars by using “Tough Neji Nut”, an anchor steel ware with internal tread attached on the bar end. 2. Connect a deformed bar and an anchor plate using frictional connection. Compared with the conventional technique, this method contributes to the labor-saving in grout filling work, the reduction of industrial waste, and the major reduction of the slip amplitude at the mating portion. In addition, this method enables higher accuracy of bar arrangement while aiming at improving the design strength of RC/SRC construction. Taking longitudinal reinforcing bar end and transverse reinforcing bar (shear reinforcing bar) end as representative application sites, this method makes it possible to apply to the wider range of civil engineering and construction structures.
    View full abstract
    Download PDF (6122K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top