Modified Layered-Sectional Analysis for Forensic Investigation
Contributing USMA Research Unit(s)
Civil and Mechanical Engineering
Journal of Performance of Constructed Facilities
This paper describes a modification to the layered-sectional analysis approach, which provides the engineer with a tool to assess structural behavior of concrete beams with localized damage, a problem not well suited to classical, closed-form solutions. The modified layered-sectional analysis (MLSA) framework is applied to a forensic investigation case study in which two prestressed double-tee beams are exposed to a short duration, intense fire in a parking structure. The results of the MLSA are within 1% of the case study load test, which indicates that the MLSA could be a useful, computationally efficient tool for the investigating engineer to predict the postfire serviceability and strength of damaged beams, and potentially eliminate the need for expensive load testing. A short parametric study is included for the research engineer interested in the MLSA for predicting the postdamage behavior of non-standard materials such as enhanced sustainability concrete (ESC).
McCoy, Brad; Seracino, Rudolf; and Leming, Michael L., "Modified Layered-Sectional Analysis for Forensic Investigation" (2014). West Point Research Papers. 200.
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