Low-Cycle Fatigue Damage of Circular Concrete-Filled-Tube Columns

International Concrete Abstracts Portal

The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

  


Title: Low-Cycle Fatigue Damage of Circular Concrete-Filled-Tube Columns

Author(s): G. W. Zhang, Y. Xiao, and S. Kunnath

Publication: Structural Journal

Volume: 106

Issue: 2

Appears on pages(s): 151-159

Keywords: concrete-filled tube; cyclic loading; local buckling; low-cycle fatigue; rupture; seismic.

DOI: 10.14359/56353

Date: 3/1/2009

Abstract:
Under seismic actions, the induced damage in critical regions of a concrete-filled steel tube (CFT) column could be attributed to cumulative damage of the steel tube caused by repeated cyclic loading in the post-yield strain range. An experimental study was undertaken to develop an analytical model of cumulative damage for circular CFT columns subjected to cyclic loading. The lowcycle fatigue behavior of CFT columns was investigated and a relationship between fatigue life and normalized displacement amplitude was established for typical controlling parameters. A total of 12 large-scale model column specimens, representing two types of circular CFT columns with different steel tube diameterto-thickness ratios were tested under quasistatic loading with either constant drift amplitude or standard cyclic loading histories with increasing peak drift displacement. Test results indicate that the low cycle fatigue behavior of CFT columns depends on the thickness of the steel tube. Fatigue life expressions useful for application in damage-based seismic design are developed and used to predict the damage index for additional CFT columns based on experimental data reported in the literature.


ALSO AVAILABLE IN:

Electronic Structural Journal



  

Edit Module Settings to define Page Content Reviewer