Strength and Ductility of Concrete Bridge Columns Under Seismic Loading
| Autor(en): |
M. J. N. Priestley
R. Park |
|---|---|
| Medium: | Fachartikel |
| Sprache(n): | Englisch |
| Veröffentlicht in: | ACI Structural Journal, Januar 1987, n. 1, v. 84 |
| Seite(n): | 61-76 |
| DOI: | 10.14359/2800 |
| Abstrakt: | A wide-ranging research project aimed at improving understanding of seismic performance of bridge substructures is briefly reviewed. Theoretical considerations relating to the interdependence of strength, ductility, bridge geometry, and foundation flexibility are developed for bridges responding inelastically to earthquake attack. Extensive test results for reinforced concrete bridge columns subjected to axial load together with inelastic reversals of lateral displacements are presented. Section shapes tested included square, octagonal, diagonally loaded square, hollow circular, and hollow square columns. Other variables included axial load level, amount and yield strength of confining reinforcement, and aspect ratio. Results indicate that current methods for predicting flexural strength invariably underestimated the true flexural strength by a substantial margin, particularly when axial load levels were high. A new design method for predicting the flexural strength and ductility of confined bridge columns is proposed. |
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