DEVELOPMENT OF SEISMIC REPAIR TECHNIQUES FOR REINFORCED CONCRETE MEMBERS

In order to inspect and define the grade of damage, seismic loading tests for reinforced concrete columns and shear walls were carried out. Both full-scale and half-scale test specimens were constructed for columns in order to check the scale effects on the grade of damage. The column specimens were designed for three type of modes. The shear wall specimens were designed for flexural failure type. After repairing these members by injecting epoxy resin into cracks and setting epoxy mortar at the exfoliated portions of concrete, the seismic loading tests were again executed in order to evaluate the effectiveness of the repair. The data of measured crack widths after the seismic loading became effective materials for evaluating the damage grade of reinforced concrete members. Generally, the initial stiffness after repair was a little less than the one before repair. The shear capacity of each specimen of columns and shear walls after repair increased compared with the corresponding value before repair. Consequently, column specimens that failed in shear before repair failed in flexural after repair. The specimen designed for flexural shear failure also had bond splitting failure before repair. After repair work, it did not show such bond splitting. Thus, the epoxy resin improved the bond characteristics. (Author)

  • Supplemental Notes:
    • Seismic Research for Highway Bridges (US-Japan Program) is a collection of Papers Reprinted Directly from the United States-Japan Cooperative Program on Natural Resources (UJNR) Panel on Wind and Seismic Effects; and the Proceedings of the US-Japan Seminars on Repair and Retrofit of Structures, 1979 to 1984.
  • Corporate Authors:

    Pittsburgh University, Pittsburgh

    Department of Civil Engineering
    Pittsburgh, PA  United States  15261

    National Science Foundation

    1800 G Street, NW
    Washington, DC  United States  20550
  • Authors:
    • Hirosawa, M
    • Nakata, S
    • Goto, T
    • Yoshimura, M
    • Shiga, T
    • SHIBATA, A
    • Imai, H
  • Publication Date: 1984-6

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Filing Info

  • Accession Number: 00394020
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 31 1985 12:00AM