The Effect of Spatial Correlation of Cone Tip Resistance on the Bearing Capacity of Shallow Foundations |
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| Authors: | G L Sivakumar Babu Satyanarayana Murthy Dasaka |
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| Institution: | (1) Department of Civil Engineering, Indian Institute of Science, Bangalore, 560 012, India;(2) Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India |
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| Abstract: | The effect of directional behaviour of correlation structure of cone tip resistance on the bearing capacity of shallow strip
footing resting on cohesionless soil deposit in 2-D random field is analysed using probabilistic approach. The results obtained
from the analysis show that the assumption of perfect (or infinite) correlation of cone tip resistance data leads to lower
values of probability of failure. In contrast, the isotropic assumption of correlation behaviour based on vertical scale of
fluctuation leads to higher values of probability of failure. The results also show that the transformation model would play
a major role in the evaluation of variability of design property. In conclusion, the need for a proper evaluation methodology
for calculation of correlation lengths of soil properties and their influence in foundation design is highlighted. |
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| Keywords: | Spatial variability Cone tip resistance Spatial correlation Anisotropy 2-D random field Shallow foundations Bearing capacity Stationarity Reliability |
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