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Determining Bearing Failure Modes of Jointed Rock Foundations Subjected to the Load of Strip Footings | ||
| AUT Journal of Civil Engineering | ||
| مقاله 3، دوره 3، شماره 2، اسفند 2019، صفحه 157-166 اصل مقاله (1.41 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajce.2019.14836.5502 | ||
| نویسندگان | ||
| Meysam Imani* 1؛ ahmad fahimifar2 | ||
| 1Geotechnical Engineering Group, Amirkabir University of Technology, Garmsar Campus, Garmsar, Iran | ||
| 2Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran | ||
| چکیده | ||
| The main prerequisite for choosing the best method of obtaining the ultimate bearing capacity of soils or rock masses is determining the probable failure mode that can occur beneath the footing. Most available methods for determining the bearing capacity of rock masses are based on general shear failure of the rock mass. But depending on the properties of the intact rock and the joint sets, other types of failure modes including local or punching shear failure may occur. In such conditions, using relations which are based on the general shear failure is not sufficiently precise. In this study, distinct element method was applied for performing wide sensitivity analyses on different intact rock and the joint sets characteristics; the range of occurrence of failure modes was investigated. Three types of failure modes including general shear failure, local shear failure, and punching shear failure were considered under the vertical load of a strip footing. Two perpendicular joint sets were considered for the jointed rock mass and different orientation angles and spacing were also taken into account for the joint sets. The obtained results showed that the shear strength properties of the intact rock and the joint sets, the elastic modulus of the intact rock and the orientation angle and spacing of the joints have a considerable effect on the mode of failure, while the normal and shear stiffness of the joint sets do not play an important role in the failure mode. | ||
| کلیدواژهها | ||
| Rock Foundations؛ Bearing Capacity؛ Failure Mode؛ Numerical Analysis؛ Distinct Element Method | ||
| مراجع | ||
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[1] R.L. Michalowski, Upper-bound load estimates on square and rectangular footings, G-otechnique, 51(9) (2001) 787-798.
[2] Y.-J. Wang, J.-H. Yin, Z.-Y. Chen, Calculation of bearing capacity of a strip footing using an upper bound method, International Journal for Numerical and Analytical Methods in Geomechanics, 25(8) (2001) 841-851.
[3] A.-H. Soubra, Upper-Bound Solutions for Bearing Capacity of Foundations, Journal of Geotechnical and Geoenvironmental Engineering, 125(1) (1999) 59-68.
[4] R.L. Michalowski, L. Shi, Bearing Capacity of Footings over Two-Layer Foundation Soils, Journal of Geotechnical Engineering, 121(5) (1995) 421-428.
[5] A. Florkiewicz, Upper bound to bearing capacity of layered soils, Canadian Geotechnical Journal, 26(4) (1989) 730-736.
[6] A.S. Vesic, Analysis of Ultimate Loads of Shallow Foundations, Journal of Soil Mechanics and Foundation Division, ASCE, 99(1) (1973) 29.
[7] K. Terzaghi, Theoretical soil mechanics, John Wiley & Sons, New York, 1943.
[8] R. Amini, A. Haddad, Performance of Bucket Foundation Resting on Sand Subjected To Vertical Load, AUT Journal of Civil Engineering, (2018) -.
[9] M. KAZEMI, J. Bolouri Bazaz, Ultimate Bearing Capacity of Composite Shell Annular Foundations in Cohesionless Soil, Amirkabir Journal of Civil Engineering, 50(4) (2018) 781-792.
[10] A. Shalchi, V. Rostami, Experimental Investigation of Bearing Capacity of Strip Footing Rest on Layered Soils Next to the Geogird Reinforced Retaining Walls, Amirkabir Journal of Civil Engineering, 50(1) (2018) 211-226.
[11] M. Imani, A. Fahimifar, M. Sharifzadeh, Upper Bound Solution for the Bearing Capacity of Submerged Jointed Rock Foundations, Rock Mechanics and Rock Engineering, 45(4) (2012) 639-646.
[12] Z. Saada, S. Maghous, D. Garnier, Bearing capacity of shallow foundations on rocks obeying a modified Hoek–Brown failure criterion, Computers and Geotechnics, 35(2) (2008) 144-154.
[13] R.S. Merifield, A.V. Lyamin, S.W. Sloan, Limit analysis solutions for the bearing capacity of rock masses using the generalised Hoek–Brown criterion, International Journal of Rock Mechanics and Mining Sciences, 43(6) (2006) 920-937.
[14] X.-L. Yang, J.-H. Yin, Upper bound solution for ultimate bearing capacity with a modified Hoek– Brown failure criterion, International Journal of Rock Mechanics and Mining Sciences, 42(4) (2005) 550-560.
[15] M. Singh, K.S. Rao, Bearing Capacity of Shallow Foundations in Anisotropic Non- Hoek–Brown Rock Masses, Journal of Geotechnical and Geoenvironmental Engineering, 131(8) (2005) 1014-1023.
[16] A. Serrano, C. Olalla, Ultimate bearing capacity of an anisotropic discontinuous rock mass. Part I: Basic modes of failure, International Journal of Rock Mechanics and Mining Sciences, 35(3) (1998) 301- 324.
[17] A. Serrano, C. Olalla, Ultimate bearing capacity of an anisotropic discontinuous rock massPart II: Determination procedure, International Journal of Rock Mechanics and Mining Sciences, 35(3) (1998) 325-348.
[18] Rock Foundations, in: U.A.C.o.E. Department of the Army (Ed.), Washington, DC, 1994.
[19] B. Ladanyi, Rock Failure Under Concentrated Loading, in: The 10th U.S. Symposium on Rock Mechanics (USRMS), American Rock Mechanics Association, Austin, Texas, 1968, pp. 26.
[20] R. Frank, C. Bauduin, R. Driscoll, M. Kavvadas, N. Ovesen, T. Orr, B. Schuppener, Designer’s guide to EN 1997-1 Eurocode 7: Geotechnical design - General rules, (2004).
[21] A.J.a.A. Lutenegger, M.T., Bearing Capacity of Footings on Compacted Sand, in: International Conference on Case Histories in Geotechnical Engineering, University of Missouri--Rolla, St. Louis, Missouri, 1998.
[22] J.L.a.J. Briaud, P., Load Settlement Curve Method for Spread Footings on Sand, in: Speciality conference, Vertical and horizontal deformations of foundations and embankments, American Society of Civil Engineers, 1994, pp. 31.
[23] A.S. Vesic, Expansion of Cavities in Infinite Soil Mass, Journal of the Soil Mechanics and Foundations Division, (1972) 26.
[24] S. Maghous, D. Bernaud, J. Freard, D. Garnier, Elastoplastic behavior of jointed rock masses as homogenized media and finite element analysis, International Journal of Rock Mechanics and Mining Sciences, 45(8) (2008) 1273-1286.
[25] M. Imani, A. Fahimifar, M. Sharifzadeh, Bearing failure modes of rock foundations with consideration of joint spacing, Scientia Iranica, 19(6) (2012) 1411- 1421.
[26] A. Serrano, C. Olalla, Allowable bearing capacity of rock foundations using a non-linear failure criterium, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 33(4) (1996) 327-345.
[27] A. Lees, Geotechnical Finite Element Analysis.
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