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A Dual-Objective-Based Tornado Design Philosophy

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https://ir.library.oregonstate.edu/concern/articles/pg15bf43n

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  • Tornadoes represent a unique natural hazard because of the very low probability of occurrence, short warning times (on the order of only a few minutes), and the intense and destructive forces imposed on engineered and non-engineered buildings. The very low-probability very high-consequence nature of a tornado strike makes designing for survival and reducing damage under typical financial constraints a substantial challenge. On April 27, 2011 an EF4 tornado devastated a 0.8 km (1/2 mile) wide path almost 10 km (5.9 miles) long through the city of Tuscaloosa, Alabama continuing on the ground for 130 km (80 miles). This paper presents the design concept that resulted following a week-long data reconnaissance deployment throughout the city of Tuscaloosa by the authors. The dual-objective philosophy proposed herein is intended to focus on both building damage and loss reduction in low to moderate tornado windspeeds and building occupant life safety in more damaging wind speed events such as EF4 and EF5 tornadoes. The philosophy articulates a design methodology that is the basis upon which structural engineering was formed, namely provide life safety and control damage, but focused at separate tornado intensity levels.
  • Keywords: Residential building, Design method, Natural hazard, Tornado
  • Keywords: Residential building, Design method, Natural hazard, Tornado
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  • van de Lindt, J., Pei, S., Dao, T., Graettinger, A., Prevatt, D., Gupta, R., & Coulbourne, W. (2013). Dual-objective-based tornado design philosophy. Journal of Structural Engineering-Asce, 139(2), 251-263. doi: 10.1061/(ASCE)ST.1943-541X.0000622
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  • 139
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  • 2
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  • The National Science Foundation provided partial support for damage analysis following the April 27, 2011 Tuscaloosa Tornado through RAPID Grant CMMI-1139722. The first author also acknowledges the Drummond Chair funds at the University of Alabama.
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