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Jiki, P. N.
- Finite Element Evaluation of Bearing Capacity Parameters for Soils in the University of Agriculture, Makurdi
Abstract Views :322 |
PDF Views:69
Authors
Affiliations
1 Department of Civil Engineering, University of Agriculture, Makurdi
2 Department of Electrical Engineering, University of Agriculture, Makurdi
3 Department of Civil Engineering, University of Nigeria, Nsukka
1 Department of Civil Engineering, University of Agriculture, Makurdi
2 Department of Electrical Engineering, University of Agriculture, Makurdi
3 Department of Civil Engineering, University of Nigeria, Nsukka
Source
Indian Journal of Innovations and Developments, Vol 1, No 3 (2012), Pagination: 121-126Abstract
Samples of soil around the University of Agriculture, Makurdi were obtained and tested in the laboratory to obtain necessary parameters, such as Young's Modulus, Poisson's, ratio, unit weight of soil, angle of internal friction ø and cohesion c which would be used in the finite element model. Using the soil parameters obtained and iso-parametric formulation, the element stiffness matrix was derived which was used to model various shallow footing foundation parameters. The results obtained from the finite element analysis were compared with computed values using bearing capacity equations in the literature for the calculation of various parameters, which will be used to calculate safe bearing pressures for circular, square and rectangular foundation footings. The results closely agree with the calculated values. It was concluded that the finite element method is a numerical method that can be used to obtain bearing capacity parameters for use in the calculation of bearing capacities for shallow foundations for preliminary designs of such footings pending experimental verification of soil parameters used.Keywords
Soil, Agriculture, Finite Element Method, Internal FrictionFull Text
References
- Zienkiewicz OC (1977) The Finite Element Method in Engineering Science. McGraw-Hill; London and NewYork.
- Griffiths DV (1980a) Finite Element Analysis of Walls, Footing and Slopes. Ph.D Thesis, University of Manchester.
- Griffiths DV (1980b) Finite Elements Analysis of Walls, Footings and Slopes, Symposium Computer Application to Geotechnical Problems in Highway Engineering. Cambridge University, U.K.
- Hansen B and Christensen NH (1969) Discussion of Theoretical Bearing Capacity of very Shallow Footings. J of Soil Mech and Foundation Eng. Div. A.S.C.E., 95(SM6), 1568-1572.
- Craig RF (1978) Soil Mechanics, ed: Van Nostrand Reinhold, 2nd Edition.
- Jiki PN (2008) Stress Analysis of Un-lapped Rectangular Hollow ‘K’ Joints by the Finite Elements Method. Botswana Journal of Technology, Gaborone, Botswana.
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- Gaadi and Sesugh (2011) Experimental Evaluation of Bearing Capacity of Soils Around University of Agriculture, Makurdi. B.Eng Project, Department of Civil Engineering, University of Agriculture, Makurdi, Benue State.
- Desai CS (1981) Constitutive Modelling and Soil Structure Interaction. ed; Martins JB. Proceedings on Numerical Methods in Geomechanics, Organised by NATO Advanced Institutes Series, Series C: Mathemetical and Physical Sciences.
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- Bowles JE (1988) Foundation Analysis and Design. McGraw-Hill Book Co. Ltd: Singapore.
- Uncoupled Lateral Buckling Energy Functional for Beams with Dual Symmetry
Abstract Views :301 |
PDF Views:67
Authors
Affiliations
1 Civil Engineering Department, University of Agriculture Makurdi, NG
1 Civil Engineering Department, University of Agriculture Makurdi, NG
Source
Indian Journal of Innovations and Developments, Vol 1, No 8 (2012), Pagination: 659-664Abstract
This paper is concerned with uncoupling the lateral buckling energy functional for thin walled beams of dual symmetric sections so that only one solution function would be used in the solution process without appreciable loss of accuracy. This is achieved by consideration of equilibrium of forces in the lateral buckling plane as well as equilibrium in the vertical plane, for the uncoupled equilibrium state. Examples are presented to show the validity of the proposed functional. Results of analysis using the proposed functional are compared with exact values in the literature and are within two percent (2 %) of the exact values. It is concluded that the proposed functional is suitable for use in the calculation of lateral buckling strengths for beams with dual sections.Keywords
Energy Functional, Buckling, Lateral, Beams, UncoupledFull Text
References
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- Timoshenko, SP & Gere, JM (1961) Theory of Elastic Stability, McGraw-Hill, Inc., New York, NY.
- Jiki, PN (2007). Buckling analysis of pre-cracked beamcolumns by Liapunov’s second method. European J. Mechanics. A /Solids. 26: 503-518.