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Journal of Applied Sciences
  Year: 2009 | Volume: 9 | Issue: 20 | Page No.: 3629-3640
DOI: 10.3923/jas.2009.3629.3640
 
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Effect of Column Spacing on the Behavior of Frame-Raft and Soil Systems

K. Natarajan and B. Vidivelli

Abstract:
The objective of this study is to analyse a space frame-raft-soil system under static load to understand the influence of column spacing on the behavior of a soil-raft and frame. In the analysis, all three components space frame, raft and soil were considered as a single compatible unit. The analyses are carried out for linear and non-linear conditions, in which soil is treated as a homogeneous and isotropic continuum. The analyses are carried out by ANSYS finite element code. The results of four different column spacings are compared and the influence of the column spacing on settlement, the bending moment and contact pressure are studied. The settlement increases considerably with increases in column spacing. The column spacings resulted in the rafts of the two raft types rigid raft and flexible raft according to the bending moment in the raft. The column spacing has a marginal effect on the contact pressure. The results of two different raft thicknesses are compared and the influence of the raft thickness on settlement, the bending moment and contact pressure are also studied. The increase in raft thickness resulted in reduced settlement, an increased bending moment and reduced uniform contact pressure. The results of two soils with different Young’s modulus are compared and the influence of Young’s modulus on settlement bending moment and contact pressure is also studied.
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How to cite this article:

K. Natarajan and B. Vidivelli, 2009. Effect of Column Spacing on the Behavior of Frame-Raft and Soil Systems. Journal of Applied Sciences, 9: 3629-3640.

DOI: 10.3923/jas.2009.3629.3640

URL: https://scialert.net/abstract/?doi=jas.2009.3629.3640

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