Department of Civil Engineering, Shahrekord University, Shahrekord, Iran
Abstract
In this study, dynamic bearing capacity of adjacent shallow strip foundations located on sandy soil was examined using a numerical finite difference modeling, FLAC. The behavioral interference of shallow strip foundations under different conditions was investigated. The effect of soil strength parameters, geometric characteristics of shallow foundations and cyclic loads at different distance ratios on the bearing capacity of foundations were evaluated. The results indicated the noticeable effect of behavioral interference on the performance of shallow foundations under cyclic loading. As the distance ratio between the foundations increases, the interference effect increased and then decreased. The greatest influence of behavioral interference on the dynamic bearing capacity of foundations was obtained at distance ratio of 2. The interference effect canceled out at the distance ratio of larger than 5. Furthermore, the effect of behavioral interference on the bearing capacity of shallow foundations increased with increasing internal friction angle, soil elasticity modulus, and foundation depth. An increase in the foundation width and loading frequency led to lower interference coefficient. In general, the results demonstrate the necessity of considering the interference effect in the assessment of the bearing capacity of shallow foundations under cyclic loading such as vibrating machines foundation.
Bandyopadhyay, B. and Meek, J.L., "Harmonic response of pile groups to dynamic loading", International Journal of Engineering, Vol. 1, No. 1, (1988), 29-36.
Makarchian, M., "An experimental study of foundation underpinning by piles", International Journal of Engineering Transaction B: Applications, Vol. 15, No. 1, (2002), 11-22.
Gupta, R. and Trivedi, A., "Behavior of model circular footings on silty soils with cellular supports", International Journal of Engineering Transaction B: Applications, Vol. 23, No. 1, (2010), 21-35.
Gheyratmand, C., "Employing foundation nonlinearity to mitigate seismic demand in superstructure", International Journal of Engineering Transaction B: Applications, Vol. 29, No. 5, (2016), 606-614
Hassaan, G.A., "Optimal Design of Machinery Shallow Foundations With Clay Soils", International Journal of Mechanical Engineering & Technology, Vol. 5, No. 3, (2014), 91-103.
Ha, I.S. and Han, J.T., "Evaluation of the allowable axial bearing capacity of a single pile subjected to machine vibration by numerical analysis", International Journal of Geo-Engineering, Vol. 7, No. 1, (2016), 22.
Bounds, W.L. and Wong, S.S. "Comparison of Foundation Design Specifications for Vibratory Machines", Practice Periodical on Structural Design and Construction, Vol. 21, No. 3, (2016), 04016009.
Chen, S.S., Liao, K.H. and Shi, J.Y. "A dimensionless parametric study for forced vibrations of foundation–soil systems", Computers and Geotechnics, Vol. 76, (2016), 184-193.
Chowdhury, I. and Dasgupta, S.P. "Dynamic Bearing Capacity of Shallow Foundation Under Earthquake Force”, Indian Geotechnical Journal, Vol. 47, No. 1, (2017), 35-46.
Conti, R., "Simplified formulas for the seismic bearing capacity of shallow strip foundations", Soil Dynamics and Earthquake Engineering, Vol. 104, (2018), 64-74.
Gazetas, G., "Analysis of machine foundation vibrations: state of the art", International Journal of Soil Dynamics and Earthquake Engineering, Vol. 2, No. 1, (1983), 2-42.
Anteneh, M., "Vibration analysis and design of block-type machine foundation interacting with soil", Ph.D. Thesis, School of Graduate Studies, Addis Ababa University, (2003).
Prakash, S. and Puri, V.K., "Foundations for vibrating machines", Journal of structural Engineering, Vol. 33, No. 1, (2006), 13-29.
Chandrakaran, S., Vijayan, P. and Ganesan, N., "A simplified procedure for design of machine foundations subjected to vertical vibrations", Journal of the Institution of Engineers. India. Civil Engineering Division, Vol. 88, No. 5, (2007), 3-12.
Pradhan, P.K., Mandal, A., Baidya, D.K. and Ghosh, D.P., "Dynamic response of machine foundation on layered soil: cone model versus experiments", Geotechnical and geological engineering, Vol. 26, No. 4, (2008), 453-468.
Marandi, S.M., Javdanian, H., "Laboratory studies on bearing capacity of strip interfering shallow foundations supported by geogrid-reinforced sand", Advanced Materials Research, Vol. 472, (2012), 1856-1869.
Lee, J. and Eun, J., "Estimation of bearing capacity for multiple footings in sand", Computers and geotechnics, Vol. 36, No. 6, (2009), 1000-1008.
Javdanian, H., Haddad, A. and Mehrzad, B., "Interference effect on bearing capacity of multiple shallow foundations supported by geosynthetic-reinforced sand", 5th Asian Regional Conference on Geosynthetics, 13 December, Bangkok, Thailand, (2012).
Stuart, J.G., "Interference between foundations, with special reference to surface footings in sand", Geotechnique, Vol. 12, No. 1, (1962), 5-22.
Das, B.M. and Larbi-Cherif, S., "Bearing capacity of two closely-spaced shallow foundations on sand", Soils and Foundations, Vol. 23, No. 1, (1983), 1-7.
Kumar, J. and Ghosh, P., "Ultimate bearing capacity of two interfering rough strip footings", International Journal of Geomechanics, Vol. 7, No. 1, (2007), 53-62.
Kumar, J. and Ghosh, P., "Upper bound limit analysis for finding interference effect of two nearby strip footings on sand", Geotechnical and Geological Engineering, Vol. 25, No. 5, (2007), doi: https://doi.org/10.1007/s10706-007-9124-9
Kumar, J. and Bhoi, M.K., "Interference of two closely spaced strip footings on sand using model tests", Journal of Geotechnical and Geoenvironmental Engineering, Vol. 135, No. 4, (2009), 595-604.
Javdanian, H., Haddad, A. and Mehrzad, B., "Experimental and numerical investigation of the bearing capacity of adjacent footings on reinforced soil", Electronic Journal of Geotechnical Engineering, Vol. 17, No. R, (2012), 2597-2617.
Javdanian, H., "The effect of geopolymerization on the unconfined compressive strength of stabilized fine-grained soils", International Journal of Engineering Transaction B: Applications, Vol. 30, No. 11, (2017), 1673-1680.
Itasca, FLAC: fast lagrangian analysis of continua. Version 7.0 [computer program]. Minneapolis, Minn: Itasca Consulting Group Inc. (2011).
Marandi, S.M. and Rasti, A.R. "Parametric study of the covering soil of tunnels constructed in liquefiable soil", International Journal of Engineering Transaction A: Basics, Vol. 25, No. 4, (2012), 333-346.
Hassani, R. and Basirat, R., "The investigation of subsidence effect on buried pipes in 3D space", International Journal of Engineering Transaction B: Applications, Vol. 30, No. 8, (2017), 1182-1189
Baidya, D. K. and Mandal, A., “Dynamic response of footing resting on a layered soil system", West Indian journal of engineering, Vol. 28, No. 2, (2006), 65-79.
American Concrete Institute (ACI), "Foundations for dynamic equipment", ACI 351.3R-94, Farmington Hills, MI, (2004).
Javdanian, H. (2018). Behavioral Interference of Vibrating Machines Foundations Constructed on Sandy Soils (RESEARCH NOTE). International Journal of Engineering, 31(4), 548-553.
MLA
H Javdanian. "Behavioral Interference of Vibrating Machines Foundations Constructed on Sandy Soils (RESEARCH NOTE)". International Journal of Engineering, 31, 4, 2018, 548-553.
HARVARD
Javdanian, H. (2018). 'Behavioral Interference of Vibrating Machines Foundations Constructed on Sandy Soils (RESEARCH NOTE)', International Journal of Engineering, 31(4), pp. 548-553.
VANCOUVER
Javdanian, H. Behavioral Interference of Vibrating Machines Foundations Constructed on Sandy Soils (RESEARCH NOTE). International Journal of Engineering, 2018; 31(4): 548-553.
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