Probabilistic Drift Limits and Performance Evaluation of Reinforced Concrete Columns

The performance of reinforced concrete (RC) columns plays a crucial role in the overall performance of framed structures and RC bridges. Therefore, the deformation limits associated with the performance of RC columns constitute an important part in the performance criteria for structural systems. On the other hand, it is possible to analytically correlate qualitative performance descriptions to quantitative design parameters such as curvature and drift at the column level. In this paper, probabilistic drift limits of RC columns at three distinctive performance levels are investigated by means of Monte Carlo simulation of the sectional curvature in conjunction with a statistical model of the plastic hinge length. A simple methodology is then introduced to evaluate the performance reliability of different column designs by constructing the fragility curves. With a generic single degree of freedom system consisting of a particular column, the probabilistic drift demands are derived from the displacement response spectra (DRS). The probability distributions of the DRS are established from a large set of ground motion records. Results of fragility curves demonstrate that increasing the flexural strength of a column does not significantly enhance its performance reliability during a probable earthquake; as a result, a design with higher flexural strength and lower ductility could be less reliable than a comparable lower strength and higher ductility design.

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  • Authors:
    • Lu, Yong
    • Gu, Xiaoming
    • Guan, Jiong
  • Publication Date: 2005-6


  • English

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  • Accession Number: 01001850
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 5 2005 9:18AM