Numerical Analysis of Dynamic Contact during Dynamic Compaction with Large Deformation
Publication: Journal of Engineering Mechanics
Volume 139, Issue 4
Abstract
The calculation of dynamic contact between the bottom of a hammer and the surface of soil is the key technical issue in dynamic compaction. In this paper, a large deformation hypothesis is used based on the relationship between strain and displacement. Then, nonlinear governing equations of soil, based on a finite-element approach, are established and an iterative calculation form is presented. According to the contact and separation processes of the hammer and soil, the dynamic contact conditions are given in the calculation of the dynamic contact stress. Finally, according to the energy conservation law, an optimization model is used and an additional energy equation is established. Furthermore, a specific algorithm for optimizing the model is given. The calculation results show both the time-interval changing features and spatial distribution features of the stress and displacement. The numerical results and field test comparisons of the rammed pit demonstrate that this method is effective.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This project was supported by the State Key Laboratory of Hydrology-Water Resources, Hydraulic Engineering (Grant No. 2010491011) and the Natural Science Foundation of Anhui Province of China (Grant No. 11040606M119).
References
Gunaratne, M., Ranganath, M., Thilakasiri, S., Mullins, G., Stinnette, P., and Kuo, C. (1996). “Study of pore pressures induced in laboratory dynamic consolidation.” Comput. Geotech., 18(2), 127–143.
Kim, D. S., and Lee, J. S. (2000). “Propagation and attenuation characteristics of various ground vibrations.” Soil Dyn. Earthquake Eng., 19(2), 115–126.
Kong, L. W., and Yuan, J. X. (1999). “Study on surface contact stress distribution properties for multi-layered foundation during dynamic consolidation.” Chinese J. Acta Mech. Sin., 31(2), 250–256.
Mayne, P. W., and Jones, J. S. (1983). “Impact stresses during dynamic compaction.” J. Geotech. Eng., 109(10), 1342–1347.
Pan, J. L., and Selby, A. R. (2002). “Simulation of dynamic compaction of loose granular soils.” Adv. Eng. Software, 33(7-10), 631–640.
Peng, X. H., Horn, R., Zhang, B., and Zhao, Q. G. (2004). “Mechanisms of soil vulnerability to compaction of homogenized and recompacted Ultisols.” Soil Tillage Res., 76(2), 125–137.
Qian, J. H., Qian, X. D., Zhao, W. B., and Shuai, F. S. (1986). “Theory and practice of dynamic consolidation.” Chinese J. Geotech. Eng., 8(6), 1–17.
Scott, R. A., and Pearce, R. W. (1975). “Soil compaction by impact.” Geotechnique, 25(1), 19–30.
Taylor, R. L., and Papadopoulos, P. (1993). “On a finite element method for dynamic contact/impact problems.” Int. J. Numer. Methods Eng., 36(12), 2123–2140.
Thilakasiri, H. S., Gunaratne, M., Mullins, G., Stinnette, P., and Jory, B. (1996). “Investigation of impact stresses induced in laboratory dynamic compaction of soft soils.” Int. J. Numer. Analyt. Meth. Geomech., 20(10), 753–767.
Tong, X. D., Jiang, Y. S., Gong, W. M., and Lu, S. S. (2000a). “A new method for dynamic contact analysis.” Chinese J. Eng. Mech., 17(6), 82–86.
Tong, X. D., Jiang, Y. S., Gong, W. M., and Lu, S. S. (2000b). “Three-dimension finite-element dynamic analysis of foundation treated by heavy tamping.” Chinese J. Build. Struct., 30(5), 46–48.
Valliappan, S., Tabatabaie Yazdi, J., and Zhao, C. B. (1995). “Analytical solution for two-dimensional dynamic consolidation in frequency domain.” Int. J. Numer. Analyt. Meth. Geomech., 19(10), 663–682.
Xie, N. G., Chen, Y., Ye, Y. and Wang, L. (2011). “Mechanism analysis of dynamic compaction based on large deformation.” Open Civ. Eng. J., 5(1), 61–68.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 139 • Issue 4 • April 2013
Pages: 479 - 488
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 28, 2011
Accepted: Jun 18, 2012
Published online: Jul 31, 2012
Published in print: Apr 1, 2013
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.