Damage Tolerance Analysis in Structural Rehabilitationby Charles J. Hookham, (M.ASCE), Black & Veatch, Ann Arbor, United States,
Abstract: The rehabilitation of existing structures requires an evaluation by the structural engineer of past performance to determine the extent of existing damage. Following evaluation of the structure, necessary testing activities, and quantification of damage, the engineer must make a determination regarding current and future structural adequacy and rehabilitation options. The `damage tolerance analysis' approach consists of assessing future performance under various physical and environmental stressors to determine the adequacy of the existing structure prior to and following rehabilitation. This approach allows for the selection of prudent rehabilitation options through a life cycle and long-term safety perspective (versus an initial improvement cost approach). The damage tolerance model is formulated from existing structural condition data, assessment of future loadings, identified degradation rates, damage tolerance analysis, and rehabilitation study. To illustrate this process, a case history involving a heavily damaged chemical processing building is presented.
Subject Headings: Rehabilitation | Damage (structural) | Stress analysis | Existing buildings | Chemical processes | Environmental issues | Model analysis
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