Title:
Behavior of Reinforced Concrete Cylindrical Shells Subjected to External Hydrostatic Water Pressure
Author(s):
Amr I. I. Helmy and Michael P. Collins
Publication:
Structural Journal
Volume:
113
Issue:
5
Appears on pages(s):
1031-1042
Keywords:
circular slab; cracks; cylindrical shells; hydrostatic pressure; reinforced concrete offshore structures; underwater structures; water flow
DOI:
10.14359/51689025
Date:
9/1/2016
Abstract:
Laboratory equipment was designed and implemented to study the effect of water pressure on reinforced concrete structures. They included a pressure vessel, a video monitoring system, and a pressurizing system. Then, the hydraulic testing facility at the University of Toronto was brought into operation. The facility is capable of testing model offshore structures under high water pressure. A one-seventh-scale model of a buoyancy compartment of a small offshore oil platform was designed and constructed as a pilot specimen. Two pilot tests were carried out using the same pilot specimen to study its behavior. The failure water pressure was approximately three times the design pressure. At failure pressure, a major circumferential crack in the cylindrical shell near the slab-shell connection was formed. At this pressure, uncontrollable water leakage through large concrete cracks associated with steel yielding occurred. The concrete in compression was capable of preventing water flow through concrete cracks until the steel yielded. Post-yielding capacity of a section was unreliable in preventing water flow.
Related References:
1. Haynes, H. H., and Nordby, B. A., “Concrete Cylinder Structures under Hydrostatic Loading,” ACI Journal Proceedings, V. 73, No. 2, Feb. 1976, pp. 87-96.
2. Olsen, O., “Implosion Analysis of Concrete Cylinders under Hydrostatic Pressure,” ACI Journal Proceedings, V. 75, No. 3, Mar. 1978, pp. 82-85.
3. Runge, K. H., and Haynes, H. H., “Experimental Implosion Study of Concrete Structures,” Proceedings of the 8th Congr. Feder. Inter., Preconstrainte, London, UK, 1978.
4. Bristol, A., “Implosion of PVC Cylinders by Water Pressure,” thesis, Department of Civil Engineering, University of Toronto, Toronto, ON, Canada, 1992.
5. Helmy, A., “Behaviour of Reinforced Concrete Cylinders Subjected to External Hydrostatic Loading,” MASc thesis, Department of Civil Engineering, University of Toronto, Toronto, ON, Canada, 1993, 122 pp.
6. Smith, J. A., “Implosion of Steel Fibre Reinforced Concrete Cylinders under Hydrostatic Pressure,” MASc thesis, Department of Civil Engineering, University of Toronto, Toronto, ON, Canada, 1999.
7. Kuchma, D. A.; Tamas, J.; and Collins, M. P., “Strength of Upper-Dome Cell-Wall Connection of Concrete Offshore Structures,” ACI Structural Journal, V. 96, No. 5, Sept.-Oct. 1999, pp. 683-692.
8. Tamas, J., “The Effects of Reinforcement Detailing on the Strength of the Dome-Cell Wall Connection in Offshore Concrete Platforms,” MASc thesis, Department of Civil Engineering, University of Toronto, Toronto, ON, Canada, 1995, 174 pp.
9. Koltuniuk, R. M., “Investigating the Influence of High Water Pressure on Cracked Surfaces of Offshore Concrete Structures,” MASc thesis, Department of Civil Engineering, University of Toronto, Toronto, ON, Canada, 1990.
10. Helmy, A., “Behaviour of Offshore Reinforced Concrete Structures under Hydrostatic Pressure,” PhD thesis, Department of Civil Engineering, University of Toronto, Toronto, ON, Canada, 1998, 217 pp.
11. Helmy, A., and Collins, M. P., “Predicting the Behavior of Storage Cells in Early Condeep Structures,” Canadian Journal of Civil Engineering, V. 43, No. 7, 2016, pp. 643-656. doi:10.1139/cjce-2015-0355
12. Helmy, A., and Collins, M. P., “Behavior of Offshore Reinforced Concrete Structures under Hydrostatic Pressure,” ACI Structural Journal, V. 113, No. 4, July-Aug. 2016, pp. 839-850.
13. Collins, M. P.; Vecchio, F. J.; Selby, R. G.; and Gupta, P. R., “The Failure of an Offshore Platform,” Concrete International, V. 19, No. 8, Aug. 1997, pp. 29-35.
14. Neville, A. M., Properties of Concrete, third edition, John Wiley & Sons, Inc., New York, 1983, 779 pp.
15. Felber, A. J., “Response: A Program to Determine the Load-Deformation Response of Reinforced Concrete Sections,” MASc thesis, Department of Civil Engineering, University of Toronto, Toronto, ON, Canada, 1990.
16. Collins, M. P., and Mitchell, D., Prestressed Concrete Basics, first edition, Canadian Prestressed Concrete Institute, Ottawa, ON, Canada, 1987, 614 pp.
17. Collins, M. P., and Mitchell, D., Prestressed Concrete Structures, first edition, Prentice-Hall, Englewood Cliffs, NJ, 1991, 766 pp.
18. Vecchio, F. J., and Collins, M. P., “The Modified Compression-Field Theory for Reinforced Concrete Elements Subjected to Shear,” ACI Journal Proceedings, V. 83, No. 2, Mar.-Apr. 1986, pp. 219-231.
19. Adebar, P., and Collins, M. P., “Shear Strength of Members without Transverse Reinforcement,” Canadian Journal of Civil Engineering, V. 23, No. 1, 1996, pp. 30-41. doi: 10.1139/l96-004
20. Collins, M. P.; Bentz, E. C.; and Vecchio, F. J., “Simplified Modified Compression Field Theory for Calculating Shear Strength of Reinforced Concrete Elements,” ACI Structural Journal, V. 103, No. 4, July-Aug. 2006, pp. 614-624.
21. Timoshinko, S. P., Theory of Plates and Shells, first edition, McGraw-Hill, New York, 1940, 492 pp.
22. Clear, C.A., “The Effects of Autogenous Healing upon the Leakage of Water through Cracks in Concrete,” Technical Report No. 559, 1985.