Keywords
combinations of actions
accidental design situation
robustness
key element
modified structural systems
accidental design situation
robustness
key element
modified structural systems
Abstract
The paper discusses two main design strategies when checking for reliability and considers accidental action combinations according the various codes. If accidental actions can be identified, one of the possible design strategies is checking the “key element”. This strategy minimizes the possibility of local failure and subsequent progressive collapse. The combination of actions for accidental design situation for checking of the “key-element” resistance was proposed. In addition, the values of the combination factors for variable loads and partial factors for permanent loads in accordance with required reliability class RC for structural element and values of accidental loads was proposed. The second strategy is checking modified structural systems in accidental design situation from unidentified accidental actions. For this case, a comparison of several probabilistic models was performed, as well as a probabilistic assessment of the accidental action combinations according the various codes.
References
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22. International Standard Organization. (2015). ISO 2394: General principles on reliability for structures, Fourth ed. Genève, Switzerland.
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24. Joint Committee of Structural Safety. (2001). JCSS Probabilistic Model Code. Part 2: Load Models.
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26. Tapia-Hernández, E., Dominguez-Palacios, A. C., and Martínez-Ruíz, M. (2019). Live loads on floors of libraries and newspaper archive buildings. International Journal of Advanced Structural Engineering, 11(2), 285-296.
27. Tur, V. V., Markovskij, D. M. (2009). Kalibrovka znachenij koefficientov sochetanij dlya vozdejstvij pri raschetah zhelezobetonnyh konstrukcij v postoyannyh i osobyh raschetnyh situaciyah. Stroitel'naya nauka i tekhnika, (2), 23.
28. Tur, V. V., Tur, A. V., and Derechennik, S. S. (2019). Checking of structural system robustness based on pseudo-static full probabilistic approach. In Proceedings of the fib Symposium 2019: Concrete-Innovations in Materials, Design and Structures (pp. 2126-2133).
29. Van Coile, R., Caspeele, R., and Taerwe, L. (2014). Reliability-based evaluation of the inherent safety presumptions in common fire safety design. Engineering structures, 77, 181-192.
30. Van Coile, R., Hopkin, D., Elhami Khorasani, N., Lange, D., and Gernay, T. (2019). Permanent and live load model for probabilistic structural fire analysis: a review. In 3rd International Conference on Structural Safety under Fire and Blast.
2. Arup (2011) Review of International Research on Structural Robustness and Disproportionate Collapse (London: Department for Communities and Local Government).
3. BS 6399. (1996). BS 6399: Loading for buildings: Part 1: Code of practice for dead and imposed loads. British Standards Institute.
4. CIB. (1989). CIB Report, Publication 116: Actions on structures, live loads in buildings.
5. Devaney, S. (2015). Development of software for reliability based design of steel framed structures in fire (Doctoral dissertation, University of Edinburgh).
6. DoD UFC Guidelines. (2005). Design of Buildings to Resist Progressive Collapse, Unified Facilities Criteria (UFC) 4-023-03. Department of Defence (DoD).
7. Ellingwood, B. R., and Culver, C. G. (1977). Analysis of live loads in office buildings. Journal of the Structural Division, 103(8), 1551-1560.
8. Ellingwood, B. R. (2005). Load combination requirements for fire-resistant structural design. Journal of Fire Protection Engineering, 15(1), 43-61.
9. Ellingwood, B. R., Smilowitz, R., Dusenberry, D. O., Duthinh, D., Lew, H. S., and Carino, N. J. (2007). Best Practices for Reducing the Potential for Progressive Collapse in Buildings.
10. European Committee for Standardization. (2006). Eurocode 1 - EN 1991-1-7: Actions on structures - Part 1-7: General actions - Accidental actions.
11. European Committee for Standardization. (2009). EN 1990:2002: Eurocode – Basic of structural Design.
12. Gernay, T., Van Coile, R., Khorasani, N. E., and Hopkin, D. (2019). Efficient uncertainty quantification method applied to structural fire engineering computations. Engineering Structures, 183, 1-17.
13. GSA Guidelines. (2003). GSA Progressive Collapse Analysis and Design Guidelines for New Federal Office Buildings and Major Modernizations Projects. General Services Administration (GSA).
14. Gulvanessian, H. (2020). Designers’guide to Eurocode: basis of structural design.
15. Guo, Q., Shi, K., Jia, Z., and Jeffers, A. E. (2013). Probabilistic evaluation of structural fire resistance. Fire technology, 49(3), 793-811.
16. Guo, Q., and Jeffers, A. E. (2015). Finite-element reliability analysis of structures subjected to fire. Journal of Structural Engineering, 141(4), 04014129.
17. Hamilton, S. R. (2011) Doctoral dissertation, Stanford University, USA.
18. Holicky, M., and Schleich, J. B. (2001, March). Modelling of a structure under permanent and fire design situation. In Proc. of the IABSE Int. Conf. Safety, Risk, Reliability-Trends in Engineering, Malta (pp. 1001-1006).
19. Holicky, M., and Schleich, J. B., 2005 ‘Accidental combinations in case of fire’, In: Implementation of Eurocodes: Handbook 5. Available online at: eurocodes.jrc.ec.europa.eu
20. Holický, M., and Sýkora, M. (2010, February). Stochastic models in analysis of structural reliability. In Proceedings of the international symposium on stochastic models in reliability engineering, life sciences and operation management, Beer Sheva, Israel.
21. Hosser, D., et al., 2008 ‘Sicherheitskonzept zur Bransdschutz-bemessung’ ZP 52-5-4.168-1239/07 , TU Braunschweig.
22. International Standard Organization. (2015). ISO 2394: General principles on reliability for structures, Fourth ed. Genève, Switzerland.
23. Iqbal, S., and Harichandran, R. S. (2010). Capacity reduction and fire load factors for design of steel members exposed to fire. Journal of structural engineering, 136(12), 1554-1562.
24. Joint Committee of Structural Safety. (2001). JCSS Probabilistic Model Code. Part 2: Load Models.
25. Kokot, S., and Solomos, G. (2012). Progressive collapse risk analysis: literature survey, relevant construction standards and guidelines. Ispra: Joint Research Centre, European Commission.
26. Tapia-Hernández, E., Dominguez-Palacios, A. C., and Martínez-Ruíz, M. (2019). Live loads on floors of libraries and newspaper archive buildings. International Journal of Advanced Structural Engineering, 11(2), 285-296.
27. Tur, V. V., Markovskij, D. M. (2009). Kalibrovka znachenij koefficientov sochetanij dlya vozdejstvij pri raschetah zhelezobetonnyh konstrukcij v postoyannyh i osobyh raschetnyh situaciyah. Stroitel'naya nauka i tekhnika, (2), 23.
28. Tur, V. V., Tur, A. V., and Derechennik, S. S. (2019). Checking of structural system robustness based on pseudo-static full probabilistic approach. In Proceedings of the fib Symposium 2019: Concrete-Innovations in Materials, Design and Structures (pp. 2126-2133).
29. Van Coile, R., Caspeele, R., and Taerwe, L. (2014). Reliability-based evaluation of the inherent safety presumptions in common fire safety design. Engineering structures, 77, 181-192.
30. Van Coile, R., Hopkin, D., Elhami Khorasani, N., Lange, D., and Gernay, T. (2019). Permanent and live load model for probabilistic structural fire analysis: a review. In 3rd International Conference on Structural Safety under Fire and Blast.
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