Contribution of Vertical Skin Friction to the Lateral Resistance of Large-Diameter Shafts
Publication: Journal of Bridge Engineering
Volume 19, Issue 2
Abstract
Large-diameter drilled shafts embedded in stiff materials (e.g., clay and weak rock) experience larger lateral resistance compared to the resistance values obtained from available soil-pile models, which usually produce a conservative design. The axial skin friction (i.e., vertical side shear) developed on the side of the large-diameter drilled shafts in stiff clay and weak rock (i.e., cohesive intermediate geomaterials) improves shaft resistance to the lateral loads (i.e., the shaft-head lateral stiffness). This paper presents a model that calculates the vertical skin friction induced by the vertical-displacement component of the shaft deflection and section rotation through the use of the relationship. The model determines the shaft-deflection resisting moment caused by the axial skin friction on the passive side of the drilled shaft. Up to a 40% increase in the shaft-head lateral stiffness () (i.e., stiffer foundations) could develop as a result of the consideration of the vertical side shear resistance. In addition, the lateral response of the superstructure would be influenced by the variation of . This study also shows the degrading effect of vertical side shear on the shaft-head lateral stiffness with the increase in shaft deflection. A number of full-scale drilled-shaft load tests have been used in this comparison, and the results obtained from the presented model highlight the contribution of vertical skin friction caused by the shaft deflection/rotation to the lateral resistance of large-diameter shafts.
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References
AASHTO. (2010). AASHTO LRFD bridge design specifications, Section C.10.7.2.4, Washington, DC.
Ashour, M., and Norris, G. (2000). “Modeling lateral soil-pile response based on soil-pile interaction.” J. Geotech. Geoenviron. Eng., 126(5), 420–428.
Ashour, M., Norris, G. M., and Elfass, S. (2004a). “Analysis of laterally loaded intermediate or long drilled shafts of small or large diameter in layered soil.” Rep. to the State of California Dept. of Transportation (CALTRANS), Contract No. 59A0348, Los Angeles.
Ashour, M., Norris, G. M., Elfass, S., and Al-Hamdan, A. (2010). “Mobilized side and tip resistances of piles in clay.” J. Comput. Geotech., 37(7–8), 858–866.
Ashour, M., Norris, G. M., and Pilling, P. (1998). “Lateral loading of a pile in layered soil using the strain wedge model.” J. Geotech. Geoenviron. Eng., 303–315.
Ashour, M., Norris, G., and Shamsabadi, A. (2001). “Effect of the non-linear behavior of pile material on the response of laterally loaded piles.” Proc., 4th Int. Conf. on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, S. Prakash, ed., Curators of Univ. of Missouri, Columbia, MO, 6.10.
Ashour, M., Pilling, P., and Norris, G. M. (2004b). “Lateral behavior of pile group in layered soils.” J. Geotech. Geoenviron. Eng., 580–592.
Bhushan, K., Fong, P. T., and Haley, S.C. (1979). “Lateral load tests on drilled piers in stiff clays.” J. Geotech. Engrg. Div., 105(8), 969–985.
Briaud, J. L., Smith, T., and Mayer, B. (1984). “Laterally loaded piles and the pressuremeter: Comparison of existing methods.” Laterally loaded deep foundations: Analysis and performance, ASTM, West Conshohoken, PA, 97–111.
Brown, D. A., O’Neill, M. W., McVay, M., El Naggar, M. H., and Chakraborty, S. (2001). Static and dynamic lateral loading of pile groups, National Cooperative Highway Research Program (NCHRP), National Academy, Washington, DC.
Evans, L. T., and Duncan, G. M. (1982). “Simplified analysis of laterally loaded piles.” Rep. No. UCB/GT/82-04, Univ. of California–Berkeley, Berkeley, CA.
Gonzalez, R., and Digioia, A. M. (1990). “The design of drilled shafts subjected to overturning moments.” Mag. Int. Assoc. Found. Drill. (ADSC), May 2–3.
Hughes, J. M. O., Goldsmith, P. R., and Fendall, H. D. W. (1978). “The behavior of piles to lateral loads.” Rep. No. 178, Civil Engineering Dept., Univ. of Auckland, Auckland, New Zealand.
Kim, Y., Jeong, S., and Lee, S. (2011). “Wedge failure analysis of soil resistance on laterally loaded piles in clay.” J. Geotech. Geoenviron. Eng., 678–694.
Lesny, K., and Hinz, P. (2009). “Design of monopile foundations for offshore wind energy converters.” Proc., Int. Foundation Congress and Equipment Expo on Contemporary Topics in Deep Foundations (GSI 185), ASCE, Reston, VA.
Liang, R. Y. (2000). “Instrumentation, monitoring, and testing at the CUY-90-15.24 Central Viaduct Project.” Research Rep. Submitted to Ohio Dept. of Transportation and Federal Highway Administration, Washington, DC.
Liang, R. Y., Shatnawi, E. S., and Nusairat, J. (2007). “Hyperbolic criterion for cohesive soils.” Jordan J. Civ. Eng., 1(1), 38–58.
Mander, J. B., Briestley, M. J. N., and Park, R. (1988). “Theoretical stress-strain model for confined concrete.” J. Struct. Eng., 1804–1826.
McVay, M. C., and Niraula, L. (2009). “Development of curves for large diameter piles/drilled shafts in limestone for FLPIER.” Rep., Contract No. BC 354 RPWO-59, Florida DOT, Univ. of Florida, Gainesville, FL.
Naval Facilities Engineering Command (NAVFAC). (1986). “Foundations and earth structures.” Design manual 7.02, Naval Facilities Engineering Command, Alexandria, VA.
Norris, G. M. (1986). “Theoretically based BEF laterally loaded pile analysis.” Proc., 3rd Int. Conf. on Numerical Methods in Offshore Piling, Institution of Nuclear Engineers, London, 361–386.
Paulay, T., and Priestley, M. J. N. (1992). Seismic design of reinforced concrete and masonry, Wiley, New York, 95–157.
PLAXIS 3D 2.2 [Computer software]. Delft, Netherlands, PLAXIS.
Qiu, T., Fox, P. J., Janoyan, K., Stewart, J. P., and Wallace, J. W. (2004). “Response and analysis of a large diameter drilled shaft subjected to lateral loading.” Proc., GeoSupport Conf. 2004: Drilled Shafts, Micropiling, Deep Mixing, Remedial Methods, and Specialty Foundation Systems (GSP 124), ASCE, Reston, VA, 613–624.
Reese, L. C. (1983). “Behavior of piles and pile groups under lateral load.” Rep. to U.S. Dept. of Transportation, Office of Research, Development, and Technology, Federal Highway Administration,Washington, DC.
Reese, L. C., and Nyman, K. J. (1978). “Field load test of instrumented drilled shafts at Islamorada, Florida.” Rep. to Girdler Foundation and Exploration Corp., Clearwater, FL.
Reese, L. C., and Welch, R. C. (1975). “Lateral loading of deep foundations in stiff clay.” J. Geotech. Engrg. Div., 101(7), 633–649.
Richart, E. F. (1975). “Some effects of dynamic soil properties on soil-structure interaction.” J. Geotech. Engrg. Div., 101(12), 1193–1240.
Santi, P. M. (2006). “Field methods for characterizing weak rock for engineering.” Environ. Eng. Geosci., 12(1), 1–11.
Santi, P. M., and Doyle, B. C. (1997). “The locations and engineering characteristics of weak rock in the U.S.” Special Publication No. 9, Association of Engineering Geologists, Denver, 1–22.
Schmertmann, J. H. (1970). “Static cone to compute static settlement over sand.” J. Soil Mech. and Found. Div., 96(3), 1011–1043.
Schmertmann, J. H., Hartman, J. P., and Brown, P. R. (1979). “Improved strain influence factor diagram.” J. Geotech. Engrg. Div., 105(6), 715–726.
Sorensen, S. P. H., Brodbæk, K. T., and Moller, M. (2009). “Evaluation of load-displacement relationships for large-diameter piles.” Rep., Faculties of Engineering, Science and Medicine, Aalborg Univ., Aalborg, Denmark.
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Published In
Journal of Bridge Engineering
Volume 19 • Issue 2 • February 2014
Pages: 289 - 302
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 4, 2012
Accepted: May 7, 2013
Published online: May 8, 2013
Published ahead of production: May 9, 2013
Published in print: Feb 1, 2014
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