SEISAN KENKYU
Online ISSN : 1881-2058
Print ISSN : 0037-105X
ISSN-L : 0037-105X
Volume 69 , Issue 4
Showing 1-10 articles out of 10 articles from the selected issue
Introduction to Special Section
Research Flash
Field Report
  • Tomoko MATSUSHITA, Kimiro MEGURO, Christopher ROLLO
    2017 Volume 69 Issue 4 Pages 211-214
    Published: July 01, 2017
    Released: July 29, 2017
    JOURNAL FREE ACCESS

    In response to the great housing needs due to the Typhoon Haiyan which hit the Central Philippines in November 2013, many national and international agencies have provided housing in various ways such as donor-driven, owner-driven or contractor-driven approach. UN-Habitat employed a type of owner-driven approach called “People’s Process” which involves the community in a systematic way and succeeded in carrying out an effective housing reconstruction project. The effects of community participation approach depend greatly on the levels of participation by the people and its contents. This paper explains the process and its mechanism of “People’s Process” and analyzes the success factors by investigating how this universal concept of community participation was customized in the given local context.

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Research Flash
  • Yudai HONMA
    2017 Volume 69 Issue 4 Pages 215-219
    Published: July 01, 2017
    Released: July 29, 2017
    JOURNAL FREE ACCESS

    In this paper, we mathematically analyze the piano education process in postwar Japan society by using big data of student piano competition. Specifically, we used a total of 560,000 databases of PTNA piano competition from 1992 to 2015. By analyzing the database, the social distance in terms of piano culture and the process of piano technology transfer will be clarified. The focus of this research is "network" and "distance" concerning (i) teacher relations in piano education and (ii) learning process of music. By quantitatively analyzing piano education "process" developed on three axes of time, space and difficulty, not only visualization of the hypothesis perceived by the piano educator sensibly but also new findings by mathematical consequences was derived.

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  • Kimiro MEGURO, Yashdev PATEL
    2017 Volume 69 Issue 4 Pages 221-225
    Published: July 01, 2017
    Released: July 29, 2017
    JOURNAL FREE ACCESS

    Reinforced concrete (RC) frame structures with masonry infill walls have been widely used throughout the world. In these structures, due to the complicated interaction of the masonry infill wall and its surrounding RC frame, they have suffered great damage in the past earthquake. Especially when the moment resistant capacity of beam-column joint is insufficient, the damage becomes serious. The general damage mechanism is that cracks in the masonry wall are caused by the frame giving shear deformation to the wall. The masonry wall with cracks falls out of the plane due to earthquake external force in the out-of-plane direction and the wall loses bearing capacity for supporting upper structure. Further, the horizontal displacement becomes large, and the beam-column joint breaks.

    Therefore, in this research, we propose a new efficient retrofit method to improve the seismic capacity of RC frame structure by installing interface material between the masonry wall and beams and columns and connecting the masonry wall to the surrounding RC frame with PP-band meshes from both inside and outside of the masonry wall. The proposed method can be applied to both new construction and existing structures.

    Based on the evaluation results by numerical approach using the Applied Element Method (AEM), which can simulate total collapse behavior of structure from sound state to complete collapse state, the proposed method can improve the seismic capacity of RC frame structures although the method is simple and inexpensive.

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