DAMAGE EVALUATION IN STEEL BOX COLUMNS BY PSEUDODYNAMIC TESTS

The authors use a pseudodynamic testing method to study the seismic response of steel box columns representing bridge piers. The concept of the pseudodynamic test is reviewed. Scaled models of steel bridge piers of box section were tested under constant axial load and using site-specific spectrum-compatible accelerograms. The damaged columns showed local buckling, due to large deformation and low-cycle fatigue. The overall damage sustained was quantified by means of a damage index created from theoretical considerations and cyclic loading tests. The damage index assesses the safety against collapse and does not consider serviceability requirements. Tests revealed that the damage sustained is dependent on structural parameters, axial load, and ground motion parameters. Based on these factors, the damage index adequately describes the overall damage sustained during an earthquake with minimal computational effort.

Language

  • English

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Filing Info

  • Accession Number: 00726096
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 23 1996 12:00AM