Analysis on Scale Effect of Bearing Capacity of Foundation by Discrete Element Method

doi:10.11908/j.issn.0253-374x.2015.05.001

Home > Archive>Volume 43, Issue 5, 2015 >0649-0656. DOI:10.11908/j.issn.0253-374x.2015.05.001

Analysis on Scale Effect of Bearing Capacity of Foundation by Discrete Element Method
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                        10.11908/j.issn.0253-374x.2015.05.001
                    
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                        JIANG MingjingJIANG Mingjing
State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China
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LI LeiLI Lei
State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China
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SUN ChaoSUN Chao
State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;College of Civil Engineering, Tongji University, Shanghai 200092, China
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Abstract:

Based on the previous experimental results and a simulation loading test with 4 widths of the footing by employing the discrete element software of PFC2D, a study was made on the general law of scale effect and the causes of the scale effect. The result indicates that with the increasing of the width of the footing, bearing capacity factor decreases, and the amount of reduction decreases with the increasing of the width of the footing. Maximum curvature of p s curve (i.e., the curvature of the inflection point) decreases with the increasing of the width of the footing, and the overall shape of p s curve gradually gets smooth. In the discrete element method(DEM) simulation of net sand, the soil strength envelope is a straight line. When peak internal friction angle of particles remains as a constant with an increasing confining pressure, the scale effect remains on the bearing capacity of the foundation, which suggests that the strength envelope of nonlinear is not the fundamental cause of scale effect.

Key words:foundation bearing capacity; bearing capacity factor; scale effect; strength envelope

Reference

[1] TERZAGHI, K. Theoretical soil mechanics[M], Wiley press, 1943.

[2] MEYERHOF G G. Some recent research on the bearing capacity of foundations[J]. Canadian Geotechnical Journal, 1963, 1(1): 16-26.

[3] CAQUOT A, KERISEL J. Sur le terme de surface dans le calcul des fondations en milieu pulverulent[C]// Proceedings of the third international conference on soil mechanics and foundation engineering, London. 1953: 336-337.

[4] BERRY D S. Stability of granular mixtures[C]// Proceedings. 38th Annual Meeting of ASTM, Philadelpohia,1935,35:491-507.

[5] DE BEER E E. The scale effect in the transposition of the results of deep-sounding tests on the ultimate bearing capacity of piles and caisson foundations[J]. Geotechnique, 1963,13(1): 39-75.

[6] TATSUOKA F. Progressive failure and particle size effect in bearing capacity of a footing on sand[C]//Proceedings. Geotechnique Engineering Congress. ASCE Geotechnology Special Publication, 1991, 27: 788-802.

[7] TATSUOKA F, SIDDIQUEE M S A, TANAKA T. Link among design, model tests, theories and sand properties in bearing capacity of footing on sand [C]//Proceedings of the International Conference on Soil Mechanics and Foundation Engineering- International Society for Soil Mechanics and Foundation engineering. AA Balkema, 1994,5:87- 87.

[8] OVESEN N K. Centrifugal testing applied to bearing capacity problems of footings on sand[J]. Geotechnique, 1975, 25(2): 394-401.

[9] YAMAGUCHI M. On the scale effect of footings in dense sand[C]//9th Internation Conference.on SMFE, 1977. 1977.

[10] Herle I, Tejchman J. Effect of grain size and pressure level on bearing capacity of footings on sand[J]. IS-Nagoya, 1997,97: 781-786.

[11] FUKUSHIMA S, TATSUOKA F. Strength and deformation characteristics of saturated sand at extremely low pressures[J]. Soils and Foundations, 1984, 24(4): 30-48.

[12] BOLTON M D. The strength and dilatancy of sands[J]. Geotechnique, 1986, 36(1): 65-78.

[13] GRAHAM J, HOVAN J M. Stress characteristics for bearing capacity in sand using a critical state model[J]. Canadian Geotechnical Journal, 1986, 23(2): 195-202.

[14] HETTLER A, GUDEHUS G. Influence of the foundation width on the bearing capcity factor[J]. Soils and foundations, 1988, 28(4): 81-92.

[15] UENO K, MIURA K, MAEDA Y. Prediction of ultimate bearing capacity of surface footings with regard to size effects[J]. Soils and foundations, 1998, 38(3): 165-178.

[16] MAEDA K, MIURA K. Confining stress dependency of mechanical properties of sands[J]. Soils and foundations, 1999, 39(1): 53-67.

[17] LANCELOT L, SHAHROUR I, AL MAHMOUD M. Failure and dilatancy properties of sand at relatively low stresses[J]. Journal of engineering mechanics, 2006, 132(12): 1396-1399.

[18] DAS B M. Shallow foundations: bearing capacity and settlement[M]. CRC press, 2009.

[19] PU J L, KO H Y. Experime ntal determination of bearing capacity in sand by centrifuge footing tests[C]// Centrifuge’ 88. 1988: 293–299.

[20] CERATO A B, LUTENEGGER A J. Scale effects of shallow foundation bearing capacity on granular material[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(10): 1192- 1202.

[21] 柳飞, 杨俊杰. 离心模型试验模拟平板载荷试验研究[J].岩土工程学报, 2007,29(6):880–886. (LIU Fei, YANG Jun-jie. Study on plate loading test by centrifugal model tests [J]. Chinese Journal of Geotechnical Engineering, 2007,29(6): 880–886.

[22] JIANG M J, KONRAD J M and LEROUEIL S. An Efficient Technique for Generating Homogeneous Specimens for DEM Studies[J]. Computers and Geotechnics, 2003, 30(5): 579- 597.

[23] 徐光明, 章为民. 离心模型中的粒径效应和边界效应研究[J]. 岩土工程学报, 1996, 18(3): 80-86. (XU Guang- ming, ZHANG Wei-min. A study of size effect and boundary effect in centrifugal tests[J]. Chinese Journal of Geotechnical Engineering, 1996, 18(3): 80-86. (in Chinese))

[24] 殷宗泽,等. 土工原理[M]. 中国水利水电出版社,2007.(YIN Zong-ze, et al. Geotechnical principles[M]. China Water Conservancy and Electricity Press, 2007. )

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JIANG Mingjing, LI Lei, SUN Chao. Analysis on Scale Effect of Bearing Capacity of Foundation by Discrete Element Method[J].同济大学学报(自然科学版),2015,43(5):0649~0656

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Received:May 29,2014
Revised:February 05,2015
Adopted:December 01,2014
Online: May 29,2015
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