Allowable Pressure of Strip Footing in Spatially Varying Cohesionless Soil – A Probabilistic Approach
نویسندگان
چکیده
Directional variability of spatial correlation is observed in natural soils due to their depositional characteristics and it influences the response of structures founded on these deposits. Nonetheless, the results presented in most of the available literature are based on the assumption of either isotropic spatial correlation or perfect spatial correlation of soil properties in horizontal and vertical directions. Hence, an effort has been made in this paper to study the effect of anisotropy of autocorrelation characteristics of cone tip resistance (qc) on the bearing capacity of a shallow strip footing. For the case considered, the results show that isotropic correlation structure based on the vertical autocorrelation distance underestimates the variability of design parameter. On the other hand, perfect correlation in horizontal or vertical, or both directions, overestimates the variability of design parameters, and produces conservative estimates of allowable bearing capacity. It is observed that transformation model influences the degree of variability of design parameter significantly.
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