Development of design procedures for the flexural strength and ductility of reinforced concrete bridge columns

  • F. A. Zahn Ministry of Works and Development, Wellington, New Zealand
  • R. Park University of Canterbury, Christchurch, New Zealand
  • M. J. N. Priestley University of Canterbury, Christchurch, New Zealand
  • H. E. Chapman Ministry of Works and Development, Wellington, New Zealand

Abstract

The assumptions and methods of analysis used to define the flexural strength and the available limit curvature of reinforced concrete columns sections are discussed. The results of cyclic moment-curvature analyses of a large range of reinforced concrete column sections, using cyclic stress-strain relationships for the steel and for the concrete, are outlined and the important variables and their influence on the available strength and curvature ductility are identified. Examples of design charts derived from these analytical results are discussed and a flow chart outlining the whole seismic resistance design procedure for bridge piers is introduced. The quantity of confining steel determined using the design charts is compared with the corresponding quantity required by the current New Zealand concrete design code equations. Finally a possible future development is discussed that would lead to an improvement of the code design method used to provide sufficient ductility in the plastic hinges of reinforced concrete columns.

References

"Code of Practice for the Design of Concrete Structures (NZS 3101 Part 1: 1982) ", Standards Association of New Zealand, Wellington, 1982, 127pp.

"Ductility of Bridges with Reinforced Concrete Piers", Civil Division Publication CDP 810/A, Ministry of Works and Development, Wellington, April 1975, 109pp.

Priestley, M.J.N, and Park, R., "Strength and Ductility of Bridge Substructures", Bulletin 71, Road Research Unit, National Roads Board, Wellington, 1984, 120pp.

Mander, J.B., Priestley, M.J.N, and Park, R., "Seismic Design of Bridge Piers", Research Report 84-2, Department of Civil Engineering, University of Canterbury, February 1984, 483pp.

Zahn, F.A., Park, R. and Priestley, M.J.N., "Design of Reinforced Concrete Bridge Columns for Strength and Ductility", Research Report 86-7, Department of Civil Engineering, University of Canterbury, March 1986, 330pp.

"Code of Practice for General Structural Design and Design Loadings for Buildings (NZS 4203:1984)", Standards Association of New Zealand, Wellington, 1984, 100pp.

Revision of CDP 810/A "Ductility of Bridges with Reinforced Concrete Piers", Ministry of Works and Development (in preparation).

"Recommended Lateral Force Requirements and Commentary'1 , Structural Engineers Association of California, San Francisco, 1980.

Applied Technology Council, "Seismic Design Guidelines for Highway Bridges", ATC-6, Applied Technology Council, Berkeley, California, October 1981, 200pp.

Park, R., "Section 6: Flexure With and Without Axial Load", Applications of New Zealand Standard Code of Practice for the Design of Concrete Structures NZS 3101 : 1982 , New Zealand Concrete Society Technical Report No.2, August 1983.

Published
1986-09-30
How to Cite
Zahn, F. A., Park, R., Priestley, M. J. N., & Chapman, H. E. (1986). Development of design procedures for the flexural strength and ductility of reinforced concrete bridge columns. Bulletin of the New Zealand Society for Earthquake Engineering, 19(3), 200-212. https://doi.org/10.5459/bnzsee.19.3.200-212
Section
Articles

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