Categorization of Damage Index of Concrete Gravity Dam for the Health Monitoring after Earthquake

This study is conducted on typical concrete gravity dam for vulnerability assessment using fragility curves. Incremental dynamic analysis is used for generation of fragility curves. A matrix of damage states is defined using severity of cracking occurred in concrete gravity dam and corresponding global instability conditions. New definitions of damage indices are proposed to identify the damage states and corresponding fragility curves are plotted against different severity parameters of earthquakes. The fragility function is also developed on the basis of crest displacement which may be an effective and viable health monitoring tool specific for the concrete gravity dam.