COMPUTATION OF BEARING CAPACITY FACTOR Nq –TERZAGHI AND PRANDTL MECHANISM
PDF

Keywords

limit equilibrium condition
Kotter’s equation
Terzaghi mechanism
Prandtl mechanism
passive thrust
bearing capacity factor

Abstract

The unique values of the bearing capacity factors, Nq are obtained in respect of failure mechanisms suggested by Terzaghi and Prandtl using limit equilibrium approach. In this paper an attempt has been made to present the analysis integrating the Kotter’s equation with Terzaghi’s and Prandtl’s mechanisms using limit equilibrium conditions. The analysis presented here with some modifications in the exiting analyses computes the bearing capacity factor – Nq , the expressions of which are similar to the one given by Terzaghi [10] and Reissner [7] who had extended the pioneering work initiated by Prandtl [6]. The analysis reported here successfully demonstrates the applicability of Kotter’s equation to the solution of limit equilibrium problems involving plane or curved failure surfaces.     

 


https://doi.org/10.29037/ajstd.245
PDF

References

Chen, W.F. (1975, )Limit Analysis and Soil Plasticity, Elsevier Scientific Publishing Company, London.

Hansen, J.B. (1961), A General Formula for Bearing capacity, Danish Geotechnical Institute, Copenhagen, Denmark, Bulletin, 11, pp. 38-46.

Kotter, F. (1903), Die Bestimmung des Drucks angekrummten, eine Aufgabe aus der Lehre vom Erddruck, Sitzungsberichte der Akademie der Wissenschaften, Berlin (in German), pp. 229-233.

Meyerhof, G.G. (1951), The Ultimate Bearing Capacity of Foundations, Geotechnique, 2, pp. 301-332.

Mohapatro, B.G. (2001), Some Studies on Bearing Capacity of Shallow Foundations, Ph.D. Thesis, IIT Bombay, India.

Prandtl, L. (1920), Uber die Harte plastischer Korper. Nachrichten von der Konilichen Gesellschaft der wissenschaften zu Gottingen, Mathematisch-Physikalische Klasse au dem Jahre, Berlin (in German), pp. 74-85.

Reissner H. Zum Erddruckproblem (1924), Proceedings of the International Congress for Applied Mechanics, Delft, The Netherlands (in German), pp. 295-311.

Saran, S. and Agarwal, R.K. (1991), Bearing Capacity of Eccentrically Obliquely Loaded Footing, Journal of Geotechnical Engineering, ASCE, 117(11), pp. 1669-1690.

Soubra, A.H. (1999), Upper Bound Solutions for Bearing Capacity of Foundations, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 125(1), pp. 59-68 .

Terzaghi, K. (1943), Theoretical Soil Mechanics, Wiley, New York, USA.

Downloads

Download data is not yet available.