Comparison of Blast Analysis Methods for Modular Steel Structures

Öz

Two blast analysis methods widely used are three-dimensional finite element (FE) and uncoupled equivalent single degree of freedom (ESDOF) methods. The uncoupled equivalent ESDOF method, which is the most common blast analysis method, provides considerable advantages and simplicity in analysis and design stages. However, the inherent assumptions and simplifications involved but especially neglecting members dynamic interactions can significantly affect accuracy of analysis results. In this study, blast performance of a prototype two-module steel blast-resistant building is evaluated using uncoupled ESDOF and FE methods. The results are compared to evaluate adequacy of uncoupled ESDOF method for blast analysis of the structure.

Anahtar Kelimeler

• Blast loads,blast-resistant steel modular buildings,equivalent single degree of freedom,dynamic interaction

Comparison of Blast Analysis Methods for Modular Steel Structures

Öz

Patlama yüklerine dayanıklı endüstriyel modüler çelik yapılar ön üretimli ve kolay taşınabiliyor olmalarından dolayı patlama riskinin yüksek olduğu yerlerde yaygın olarak kullanılmaktadırlar. Bu yapıların sistem elemanlarının patlama yüklerinin etkisi için tasarımında ve analizinde genelde basitleştirilmiş eşdeğer tek serbestlik dereceli yay (ESDOF) modelleri kullanılır. Fakat bu yöntem, elemanların dinamik etkileşimini ihmal eden bir yaklaşımdır. Bu çalışmada, iki modülden oluşan prototip binanın patlama yükleri etkisinde yapısal elemanlarında oluşan hasar düzeyi ESDOF ve dinamik etkileşimin ihmal edilmediği daha güvenilir sonuçlar veren sonlu elamanlar yöntemleriyle belirlenmiştir. Sonuçlar, yapısal elemanlarda oluşan patlama hasarlarının belirlenmesinde ESDOF yönteminin sonlu elemanlar yöntemine oranla yeterliliğini belirlemek için kullanılmıştır.

Anahtar Kelimeler

• Patlama yükleri,endüstriyel modüler çelik yapılar,eşdeğer tek serbestlik dereceli yay,dinamik etkileşim

Kaynakça

1. Yokoyama T., "Verification and Expansion of Single-Degree-of-Freedom Transformation Factors for Beams using a Multi-Degree-of-Freedom Non-Linear Numerical Analysis Method," MS Thesis, California Polytechnic State University, 2011.
2. Lawver D., Daddazio R. Vaughan D., Stanley M., and Levine H., "Response of AISC Steel Column Sections to Blast Loading," ASME Pressure and Vessels and Piping Conference, Cleveland, Ohio, 2003.
3. Biggs J.M., Introduction to Structural Dynamics, McGraw-Hill, New York, 1964.
4. Baker W. E., Cox P.A., Westine P.S., Kulesz J.J., and Strehlow R.A., Explosion Hazard and Evaluation, Elsevier, Amsterdam, Netherlands, 1983.
5. "Specification for Structural Steel Buildings (AISC 360-10)," American Institute of Steel Construction, Chicago, Illinois, 2010.
6. "Seismic Provisions for Structural Steel Buildings (AISC 341-16)," American Institute of Steel Construction, Chicago, Illinois, 2016
7. "Structures to Resist the Effects of Accidental Explosions, Army TM 5-1300, Navy NAVFAC," U.S. Department of the Army, Washington, DC., 1990.
8. Committee for the Prevention of Disasters Due to Dangerous Substances, "TNO Green Book, Method for the Determination of Possible Damage to People and Objects Resulting from Releases of Hazardous Materials (CPR 16E)," The Director-General of Labor, Netherlands, 1992.

9. Feldgun V. R., Yankelevsky D., and Karinski Y.S., "Study of the Blast Response of Beams and Thin Rectangular Plates Using a Nonlinear SDOF Model," the 16th ISIEM, Destin, FL, 2015.
10. "Reference Manual to Mitigate Potential Terrorist Attacks against Buildings (FEMA 426)," Washington, D.C., 2003
11. "Primer for Design of Commercial Buildings to Mitigate Terrorist Attacks (FEMA 427)," Washington, D.C., 2003.
12. Ngo T., Mendis P., Gupta A., and Ramsay J., "Blast Loading and Blast Effects on Structures - An Overview," Electronic Journal of Structural Engineering, Special Issue: Loading on Structures, 7, 76-91, 2007.
13. Comert M., and Ilki A., "The Explosion Performance of a Ball Powder Production Facility," Journal of Performance of Constructed Facilities, 24, 326-336, 2010.
14. "Design of Blast Resistant Buildings in Petrochemical Facilities," American Society of Civil Engineers (ASCE), New York, 1997.
15. Summers P., "Design of Modular Blast-Resistant Steel-Frames Buildings in Petrochemical Facilities," Structures Congress, Vancouver, Canada, 2008
16. "Methodology Manual for the Single-Degree-of-Freedom Blast Effects Design Spreadsheets," U.S. Army Corps of Engineer, Omaha, 2008.
17. Krauthammer T., "Blast Mitigation Technologies: Developments and Numerical Considerations for Behavior Assessment and Design," Proceedings of International Conference on Structures under Shock and Impact, Computational Mechanic Publications, Southampton, 1998.
18. Conrath E. J., Krauthammer T., Marchand K. A., and Mlakar P. F., Structural Design for Physical Security: State of the Practice, American Society of Civil Engineers, Reston, Virginia, 1999.