Abstract
To achieve greater cost effectiveness in designing tunnel liners for a large transfer system in the California State Water Project, a model study was conducted. The main concern was the ability of a ringstiffened cylindrical shell encased in concrete to resist buckling when subjected to external hydrostatic pressure.
A series of seven models was tested, six of them employing steel liners encased in concrete. Early designs were based on existing failure criteria and analysis methods for cylinders not encased. Based on the results of model tests, analysis and design methods were modified to gain greater cost effectiveness of the liners. The effects that concrete encasement and certain design imperfections, such as residual stresses and out-of-roundness, have upon collapse strength were studied analytically and experimentally. A design method was then developed, utilizing the results of the study. An outline of the design procedure is presented, although emphasis is on instrumentation and model-test procedures.
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References
Timoshenko, S. P. andGere, J. M., Theory of Elastic Stability, McGraw-Hill, New York (1961).
Windenburg, D. F. and Trilling, C., “Collapse of Instability of Thin Cylindrical Shells Under External Pressure,”ASME Transactions,56 (11) (November 1934).
Meck, H. R., “A Survey of Methods of Stability Analysis of Ring-Stiffened Cylinders Under Hydrostatic Pressure,” Jnl. Eng. Ind., ASME Transactions,87,Series B (August 1965).
Pulos, J. G., “Structural Analysis and Design Considerations for Cylindrical Pressure Hulls,” David Taylor Model Basin Report 1639 (April 1963).
Pulos, J. G. and Salerno, V. L., “Axisymmetric Elastic Deformation and Stresses in a Ring-stiffened Perfectly Circular Cylindrical Shell Under External Hydrostatic Pressure,” David Taylor Model Basin Report 1947 (September 1961).
Jain, R. K., Griffith, A. R., and Stephens, M. N., “The Unprecedented Lift-Tehachapi Pumping Plant Discharge Lines,” Proceedings, Western Water and Power Symposium (April 1968).
Kiesling, E. W., DeHart, R. C., Jain, R. K., and Griffith, A. R., “Stability of Ring-Stiffened Cylindrical Shells Encased in Concrete,” Southwest Research Institute Report (May 1969).
Jain, R. K., Griffith, A. R., and Kiesling, E. W., “Design of Penstocks for External Pressure,” To be published.
Hom, E., “Elastic Stresses in Ring Frames of Imperfectly Circular Cylindrical Shells Under External Pressure Loading,” David Taylor Model Basin Report 1505 (May 1962).
Krenzke, M. A., “Effect of Initial Deflections and Residual Welding Stresses on Elastic Behavior and Collapse Pressure of Stiffened Cylinders Subjected to External Hydrostatic Pressure,” David Taylor Model Basin Report 1327 (April 1960).
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was formerly Senior Research Engineer, Southwest Research Institute San Antonio, Tex
was formerly with California Walter resources Department
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Kiesling, E.W., DeHart, R.C. & Jain, R.K. Testing of ring-stiffened cylindrical shells encased in concrete—Instrumentation and procedures. Experimental Mechanics 10, 251–256 (1970). https://doi.org/10.1007/BF02324098
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DOI: https://doi.org/10.1007/BF02324098