An experimental research program on dynamic behavior of reinforced concrete bridge pier columns using the dynamic structural experimental facility at the Earthquake Engineering Laboratory of the Public Works Research Institute started in 1981. Following preliminary tests conducted in 1981, reversed cyclic loading tests of reinforced concrete bridge pier column models with different longitudinal reinforcement ratios were performed in 1982. The length scale ratio of the models to the prototype for a Japanese typical bridge pier column was taken about 1/5. The longitudinal reinforcement ratios of the three types of model were P sub iota = 1.79%, 0.87%, and 0.48%. Reversed cyclic displacements of ten cycles with an amplitude of n delta y (delta y: yield displacement, n = 1, 2, 3, 4, 5, .....) were applied to the top of the column. The loading was static and dynamic (sinusoidal waves with a velocity amplitude of 25 cm/sec). The models were flexurally failed with concrete crush and longitudinal reinforcement cut at the bottom of the column. Displacement ductility factors mu (= ultimate displacement/yield displacement) of the three types of column were about mu = 4 for P sub t = 1.79% (tensile reinforcement ratio: P sub t= 1.02%), mu = 7 for P sub t = 0.87%, (P sub t = 0.50%), and mu = 10 for P sub t = 0.48% (P sub t = 0.27%). The ductility factor increased as the longitudinal reinforcement ratio decreased. (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:
    • IWASAKI, T
    • Hagiwara, R
    • Hasegawa, K
    • Koyama, T
    • Yoshida, T
  • Publication Date: 1984-6

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Filing Info

  • Accession Number: 00394004
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 31 1985 12:00AM