Stochastic analysis of foundation immediate settlement on heterogeneous spatially random soil considering mechanical anisotropy

被引:31
作者
Chenari, Reza Jamshidi [1 ]
Roshandeh, Somayeh Pourvahedi [1 ]
Payan, Meghdad [2 ]
机构
[1] Univ Guilan, Fac Engn, Dept Civil Engn, Rasht, Guilan, Iran
[2] KN Toosi Univ Technol, Fac Civil Engn, Tehran, Iran
来源
SN APPLIED SCIENCES | 2019年 / 1卷 / 07期
关键词
Shallow foundation; Immediate settlement; Differential settlement; Stiffness anisotropy; Monte Carlo simulation; BEARING-CAPACITY; VARIABILITY; CLAY; STABILITY; DEPOSITS; DESIGN;
D O I
10.1007/s42452-019-0684-0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The study presents a probabilistic immediate settlement analysis of shallow foundations resting on an anisotropic soil layer of spatially random properties. To this end, a rigid foundation of quite negligible slippage has been considered. Stochastic finite element method along with the numerous Monte Carlo simulations is implemented to explore the potential influence of mechanical anisotropy on the elastic settlement of a single spread footing. The analysis is also performed for the differential undrained settlement response of a pair of shallow foundations. Exploiting variable stochastic properties for the soil elastic modulus, including covariance, scale of fluctuation and cross-anisotropy ratios, several realizations of the respective soil stiffness measure are adopted, leading to the consequential corresponding realizations of the shallow foundation settlement. The results of the numerical simulations show that the increase in the elastic modulus anisotropy ratios leads to a dramatic reduction in the induced foundation settlement. Furthermore, it was observed that with the increase in the auto-correlation distance for the soil elastic modulus, the discrepancies between the evaluated settlements using deterministic and stochastic analyses grow more phenomenal. The computed settlements of the footings, considering the substantial effect of soil anisotropy, are also observed to be greater when a stochastic analysis is employed.
引用
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页数:15
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