Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
Volume 43, Issue 11
Displaying 1-7 of 7 articles from this issue
  • I. Funakawa, S. Ushijima, T. Miyagawa, Y. Yamamoto
    2005 Volume 43 Issue 11 Pages 3-11
    Published: November 01, 2005
    Released on J-STAGE: April 26, 2013
    JOURNAL FREE ACCESS
    This paper explain a summary of “Recommendation for Concrete Repair and Surface Protection of Concrete Structures”, Concrete Library 119, published by Japan Society of Civil Engineering in April 2005. In this recommendation, the principle approach is indicated for the application of the concrete repair and surface protection which includes four methods of organic surface coating, inorganic surface coating, surface penetrate and patching repair. The design and construction technique and the maintenance methods of those four methods mentioned above are described in “Manuals for Concrete Repair and Surface Protection Method of Concrete Structures”. In this report, case examples from concrete repair and surface protection method of concrete structures is presented in addition to the outline of recommendation.
    Download PDF (1791K)
  • T. Shimazu
    2005 Volume 43 Issue 11 Pages 12-17
    Published: November 01, 2005
    Released on J-STAGE: April 26, 2013
    JOURNAL FREE ACCESS
    First, this paper explains the characteristics of vertical ground motions, mainly based on the recorded data obtained during 1994 Northridge earthquake. Ratios of peak vertical to horizontal ground motions are discussed together with illustrated accelerograms and spectral acceleration of vertical ground motions. Ratios of peak vertical to horizontal acceleration at roof of buildings are also discussed with the illustration of behaviors of parking concrete buildings during 1994 Northridge earthquake. Second, the seismic provisions regarding vertical ground motions in each building code of Japan, China and U.S.A. are introduced. In the Japan building code, no special provisions are provided except the precast beams of PC building structures. In China, special provisions are given for high-rise buildings (more than 9 storied buildings) calculated based on spectral acceleration and the distribution of inverted triangle as well as for large span beams. In U.S.A., special provisions are given for strength design method, taking into considerations the effects of vertical ground motions on load factors. Finally, suggestions are given for design methods regarding vertical ground motions induced by big earthquakes in the near future.
    Download PDF (1082K)
  • M. Maruta, T. Kanda, S. Nagai, Y. Yamamoto
    2005 Volume 43 Issue 11 Pages 18-26
    Published: November 01, 2005
    Released on J-STAGE: April 26, 2013
    JOURNAL FREE ACCESS
    Recently, core wall structures are increased because of omitting columns and beams inside living space. It is realized of the new kind structure with ECC (Engineered Cementecious Conposite) coupling beam that consume seismic energy. ECC have an especially tensile capacities and crack width restriction effect caused of small cracks dispersion under tensile stress. ECC is a cementecious complex material reinforced short fibers. Design requirement for the new structure's ECC coupling beam are 1) prevention of shear and bond failure and maintain of strength until 4% drift angle, 2) keeping under 0. 3 mm of crack width after earthquake. To satisfy these requirement, some structural tests were conducted to establish the structural design method for ECC beams. And, quality control method for making ECC beams at a pre-cast plant was in preparation. This paper contains these upper issues.
    Download PDF (28213K)
  • T. Kondo, S. Nakamura, Y. Imaizumi, T. Oono
    2005 Volume 43 Issue 11 Pages 27-34
    Published: November 01, 2005
    Released on J-STAGE: April 26, 2013
    JOURNAL FREE ACCESS
    Lately, a 3 dimensional shape measurement using a CCD camera has been adopted in large-scale pre-cast segment bridges which are in the New Toumeisin highway. As a part of the application of a 3 Dimensional Product Model (3 DPM) we considered the acquisition of 3 dimensional shape data using a digital camera to the actual segment. Because we can improve the structural management acquiring 3 dimensional shape data and using the data effectively. As the result of the 3 dimensional shape measurement experiment we have got the knowledge of the approximate accuracy and have got the subjects to improve the accuracy. In addition to this experiment we describe the efficiency of 3 DPM if we used 3 dimensional measurement data on 3 DPM system.
    Download PDF (6454K)
  • [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2005 Volume 43 Issue 11 Pages 36-43
    Published: November 01, 2005
    Released on J-STAGE: April 26, 2013
    JOURNAL FREE ACCESS
    Download PDF (37027K)
  • [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2005 Volume 43 Issue 11 Pages 44-49
    Published: November 01, 2005
    Released on J-STAGE: April 26, 2013
    JOURNAL FREE ACCESS
    Download PDF (32113K)
  • [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2005 Volume 43 Issue 11 Pages 50-55
    Published: November 01, 2005
    Released on J-STAGE: April 26, 2013
    JOURNAL FREE ACCESS
    Download PDF (34016K)
feedback
Top