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Structural Engineering and Mechanics   Volume 60, Number 5, December10 2016, pages 875-890
A new damage index for seismic fragility analysis of reinforced concrete columns
Jun Won Kang and Jeeho Lee

Abstract     [Buy Article]
    A new structural damage index for seismic fragility analysis of reinforced concrete columns is developed based on a local tensile damage variable of the Lee and Fenves plastic-damage model. The proposed damage index is formulated from the nonlinear regression of experimental column test data. In contrast to the response-based damage index, the proposed damage index is well-defined in the form of a single monotonically-increasing function of the volume weighted average of local damage distribution, and provides the necessary computability and objectivity. It is shown that the present damage index can be appropriately zoned to be used in seismic fragility analysis. An application example in the computational seismic fragility evaluation of reinforced concrete columns validates the effectiveness of the proposed damage index.
Key Words
    damage index; plastic-damage model; local damage variable; seismic fragility analysis; reinforced concrete column
Jun Won Kang: Department of Civil Engineering, Hongik University, Seoul, 04066, Korea
Jeeho Lee: Department of Civil and Environmental Engineering, Dongguk University, Seoul, 04620, Korea

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