CHBDC buried structures: challenges in keeping pace with practice and innovation

• Autorzy: Newhook J. P.

Identyfikatory

DOI

10.21008/j.1897-4007.2017.23.02

• Konferencja: European Conference on Buried Flexible Steel Structures (3 ; 24-25.04.2017 ; Rydzyna, Polska)
• Języki publikacji: EN

Abstrakty

EN

Soil-steel structures have been part of Canadian design codes since the 1970s. The inclusion in the Ontario design codes was necessary due to a growing use of flexible buried structures in practice. Since those early developments, the subsequent code committees have always strived to find the appropriate balance between the primary objective of providing design criteria that reflect the safety and serviceability requirements of the code and incorporating the significant practical experience of owners, engineers and industry. Each decade has seen innovations in products and applications as well as advances in research and numerical modelling. Editions of the code have acknowledged these changes, often in the non-mandatory sections, but have sometimes struggled to provide specific criteria. Instead it has provided general guidance or framework for design. Currently, many of the existing design clauses do not directly cover the applications of both flexible and rigid buried structures in regular use today. This paper describes the key updates being proposed for the Buried Structures section of the Canadian Highway Bridge Design Code. These changes are based on input from owners, engineers and industry describing the needs for current design and practice as well as a modem framework for permitting innovation. The major changes include areas such of finite element analysis, foundation design, conduit wall buckling and the use of flexible structures in cold regions susceptible to permafrost. These major changes will be discussed conceptually as final approval is still pending before inclusion in the 2019 version. The paper will describe some of the background and rationale for the proposals. Finally, the paper will discuss the challenges faced by the sub-committee in determining what should be included in the mandatory sections of the code or in commentary.

Słowa kluczowe

EN

codes; finite element modelling; buried structures; foundations; buckling; construction; cold regions

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Archiwum Instytutu Inżynierii Lądowej
• Rocznik: 2017
• Tom: Nr 23
• Strony: 21--33
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Newhook J. P.

• Department of Civil and Resource Engineering, Dalhousie University, Halifax, Canada

Bibliografia

• 1. Abdel-Sayed, G; Bakht, B. and Jaeger, L.G. 1993. Soil-Steel Bridges: Design and Construction. McGraw-Hill Inc. US.
• 2. Bakht,B. 2007. Evolution of the design methods for soil-metal structures in Canada. Proceedings of the 1st European Conference on Buried Flexible Steel Structures. Rydzyna, Poland April 23-24.
• 3. CSA S6-14. 2014. Canada Highway Bridge Design Code. Canadian Standards Association. Toronto, Canada.
• 4. Haji Abdulrazagh, P. and Bayoglu Flener, E. 2012. Numerical analysis of box-type soil-steel Structure under static service loads. Proceedings of the II European Conference on Buried Flexible Steel Structures in Road and Railway Engineering. Rydzyna, Poland April 24-25.
• 5. Elshimi, T.M. 2011. Three-dimensional nonlinear analysis of deep-corrugated steel culverts. Ph.D. Thesis, Queen’s University, Canada.
• 6. FHWA-HRT-10-077. 2013.Composite Behavior of Geosynthetic Reinforced Soil Mass. Technical Report. Federal Highways Administration. USA.
• 7. Korusiewicz, L. 2012. Computer software for calculating internal and external forces in corrugated culverts on the basis of measured strains. Proceedings of the II European Conference on Buried Flexible Steel Structures in Road and Railway Engineering". Rydzyna, Poland April 24-25.
• 8. NCHRP 647. 2010. Recommended Design Specifications for Live Load Distribution to Buried Structures. Transportation Research Board. Washington, USA.
• 9. NCHRP 473. 2002. Recommended Specifications for Large-Span Culverts. Transportation Research Board. Washington, USA.
• 10. Moore, I. D. (1988). “Elastic stability of buried elliptical tubes.” Geotechnique, 38(4), 613-618.
• 11. Moore, I. D., “The elastic stability of shallow buried tubes.” Geotechnique, Vol. 37, No. 2 (1987) pp. 151-161.
• 12. Moore, I.D. and Selig, E.T., 1990. Use of continuum buckling theory for evaluation of buried plastic pipe stabilityBuried Plastic Pipe Technology, ASTM STP 1093, George S. Buczala and Michael J. Cassady, Eds., American Society for Testing and Materials, Philadelphia, pp. 344-359.
• 13. Moore, I.D., Haggag, A. and Selig, E.T., 1994. Buckling strength of flexible cylinders with nonuniform elastic support. Intl. Journal of Solids and Structures, Vol. 31, No. 22, pp. 3041-3058.
• 14. Vallee, J., Newhook, J.P. and Ford, W. 2014. Construction and Monitoring of Soil-Steel Bridge with Deeper Corrugated Plates. Proceedings of 9th International Conference on Short and Medium Span Bridges Calgary, Alberta, Canada, July 15-18.
• 15. Vallee, J. Investigation of Increased Wall Stiffness on Load Effect Equations for Soil Metal Structures. MASc Thesis. Dalhousie University, Canada.
• 16. Williams, K; MacKinnon, S and Newhook, J.P. 2012. New and innovative developments for design and installation of deep corrugated buried flexible steel structures. Proceedings of the II European Conference on Buried Flexible Steel Structures in Road and Railway Engineering". Rydzyna, Poland April 24-25.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).