Effect of Footing Shape and Embedment on the Settlement, Recentering, and Energy Dissipation of Shallow Footings Subjected to Rocking
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 12
Abstract
From results of a recent series of centrifuge model tests, this paper investigates the effects of shape and embedment on the performance of rocking footings. Rectangular and H-shaped footings are considered. Previous studies have characterized the performance of rectangular rocking foundations on sand and clay, but few studies have systematically characterized the effects of footing shape. The effect of shape and embedment are correlated to detrimental aspects of performance (residual settlement or uplift) and beneficial aspects of performance (hysteretic energy dissipation and recentering). The new results are compared with previously reported results. For rectangular footings rocking in their strong direction, it is found that the susceptibility to residual settlement and uplift increases as the length-to-width ratio increases. For H-shaped footings, susceptibility to settlement and uplift increases with the missing area ratio. The factors that lead to increased recentering also tend to lead to decreased energy dissipation.
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Acknowledgments
This work was primarily supported by the National Science Foundation’s Network for Earthquake Engineering Simulation (NSF-NEES) under Grant number CMMI 0936503. Any findings, statements, and conclusions are those of the authors and do not necessarily reflect the opinions of the sponsoring organizations. The authors would like to thank Prof. Sashi Kunnath, Prof. Ross Boulanger, Prof. Tara C. Hutchinson, Prof. Mark Aschheim, Dr. Weian Liu, and Andreas G. Gavras for their suggestions and contributions. The authors would also like to thank the staff of the Center for Geotechnical Modeling at UC Davis for their assistance with the experiments presented in this paper.
References
Antonellis, G., et al. (2015). “Shake table test of large-scale bridge columns supported on rocking shallow foundations.” J. Geotech. Geoenviron. Eng., 04015009.
ASCE. (2013). “Seismic evaluation and retrofit of existing buildings.” ASCE/SEI 41-13, Reston, VA.
Bolton, M. D. (1986). “The strength and dilatancy of sands.” Geotechnique, 36(1), 65–78.
De Beer, E. (1965). “Influence of the mean normal stress on the shearing resistance of sand.” VI Int. Conf. on Soil Mechanics and Foundation Engineering, Vol. 1, University of Toronto Press, Toronto, 165–169.
Deng, L., Kutter, B., and Kunnath, S. (2014). “Seismic design of rocking shallow foundations: Displacement-based methodology.” J. Bridge Eng., 04014043.
Deng, L., and Kutter, B. L. (2012). “Characterization of rocking shallow foundations using centrifuge model tests.” Earthquake Eng. Struct. Dyn., 41(5), 1043–1060.
Deng, L., Kutter, B. L., and Kunnath, S. (2011). “Centrifuge modeling of bridge systems designed for rocking foundations.” J. Geotech. Geoenviron. Eng., 335–344.
Drosos, V., Georgarakos, T., Loli, M., Anastasopoulos, I., Zarzouras, O., and Gazetas, G. (2012). “Soil-foundation-structure interaction with mobilization of bearing capacity: Experimental study on sand.” J. Geotech. Geoenviron. Eng., 1369–1386.
Gajan, S., and Kutter, B. L. (2008). “Capacity, settlement, and energy dissipation of shallow footings subjected to rocking.” J. Geotech. Geoenviron. Eng., 1129–1141.
Garnier, J., et al. (2007). “Catalogue of scaling laws and similitude questions in geotechnical centrifuge modeling.” Int. J. Phys. Modell. Geotech., 7(3), 1–23.
Hakhamaneshi, M. (2014). “Rocking foundations for building systems, effect of footing shape, soil environment, embedment and normalized moment-to-shear ratio.” Ph.D. thesis, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA.
Hakhamaneshi, M., Kutter, B. L., Deng, L., Hutchinson, T. C., and Liu, W. (2012). “New findings from centrifuge modeling of rocking shallow foundations in clayey ground.” Proc., ASCE 2012 Geo-Congress, ASCE, Reston, VA.
Hakhamaneshi, M., Kutter, B. L., Moore, M., and Champion, C. (2016). “Validation of ASCE 41-13 modeling parameters and acceptance criteria for rocking shallow foundations.” Earthquake Spectra, 32(2), 1121–1140.
Housner, G. W. (1963). “The behavior of inverted pendulum structures during earthquakes.” Bull. Seismo. Soc. Am., 53(2), 403–417.
Johnson, K. E. (2012). “Characterization of test results of rocking shallow foundations using a multi-linear hysteretic model.” M.S. thesis, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA.
Kramer, S. L. (1996). Geotechnical earthquake engineering, Prentice Hall, Upper Saddle River, NJ, 653.
Kutter, B. L., Hakhamaneshi, M., Hutchinson, T. C., and Liu, W. (2013). “Rocking foundations on clayey environment-MAH01.” Network Earthquake Eng. Simul. Dataset, in press.
Kutter, B. L., Moore, M., Hakhamaneshi, M., and Champion, C. (2016). “Rationale for shallow foundation rocking provisions in ASCE 41-13.” Earthquake Spectra, 32(2), 1097–1119.
Liu, W., Hutchinson, T. C., Gavras, A. G., Kutter, B. L., and Hakhamaneshi, M. (2015). “Seismic behavior of frame-wall-rocking foundation systems. Part I: Test program and slow cyclic results.” J. Struct. Eng., 04015059.
Liu, W., Hutchinson, T. C., Kutter, B. L., Hakhamaneshi, M., Aschheim, M., and Kunnath, S. (2013). “Demonstration of compatible yielding between soil-foundation and superstructure components.” J. Struct. Eng., 1408–1420.
Mergos, P. E., and Kawashima, K. (2005). “Rocking isolation of a typical bridge pier on spread foundation.” J. Earthquake Eng., 9(Sup 2), 395–414.
Mylonakis, G., and Gazetas, G. (2000). “Seismic soil-structure-interaction: Beneficial or detrimental?” J. Earthquake Eng., 4(3), 277–301.
Pecker, A., and Chatzigogos, C. T. (2010). “Non linear soil structure interaction: Impact on the seismic response of structures.” Geotechnical, geological, and earthquake engineering, Vol. 17, Springer, New York, 79–103.
Rosebrook, K. (2001). “Moment loading on shallow foundations: Centrifuge test data archives.” M.S. thesis, Univ. of California, Davis, CA.
Taylor, P. W., Bartlett, P. E., and Wiessing, P. R. (1981). “Foundation rocking under earthquake loading.” Proc., 10th Int. Conf. Soil Mechanics Foundation Engineering, Vol. 3, A.A. Balkema, Rotterdam, Netherlands, 313–322.
Ugalde, J. A., Kutter, B. L., Jeremic, B., and Gajan, S. (2007). “Centrifuge modeling of rocking behavior of bridges on shallow foundations.” Proc., 4th Int. Conf. Earthquake Geotechnical Engineering, Springer, New York.
Wiessing, P. R. (1979). “Foundation rocking on sand.” M.E. thesis, Univ. of Auckland, School of Engineering, Auckland, New Zealand.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 142 • Issue 12 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jan 8, 2015
Accepted: Apr 26, 2016
Published online: Jul 14, 2016
Published in print: Dec 1, 2016
Discussion open until: Dec 14, 2016
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