A generalized consolidation model under cyclic loading
A generalized consolidation model under cyclic loading
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DOI：
10.1080/19386362.2019.1701219
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发表时间：
2020-07
影响因子：
1.9
通讯作者：
Monideepa Paul;R. Sahu;G. Banerjee
中科院分区：
文献类型：
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作者：
Monideepa Paul;R. Sahu;G. Banerjee
摘要提出了一种计算长期循环荷载作用下粘性土孔隙水压力和固结度的广义固结模型。采用基本原地应力和太沙基的有效应力原理，制定建议的分析模型，其中不排水孔隙水压力的产生粘性土。利用拉普拉斯变换，得到固结问题的非线性解析解。本文通过参数试验研究了循环应力比、频率、土的塑性指数和围压等参数对循环荷载作用下固结的影响。固结速率随循环应力比和围压的增大而增大，随加载频率的减小而减小。此外，建议的分析模型与已发表的数据吻合良好，这表明它可以被实践工程师用于预测长期循环荷载下的固结。
ABSTRACT A generalized consolidation model is proposed to compute pore water pressure and degree of consolidation of cohesive soils subjected to long-term cyclic loading. The fundamental in-situ stress and Terzaghi’s principle of effective stress are adopted to formulate the proposed analytical model where undrained pore water pressure generation for cohesive soil is introduced. By employing Laplace transformation, a closed-form nonlinear solution for consolidation is derived. This paper presents a parametric study to investigate the effects of parameters like cyclic stress ratio, frequency, plasticity index of soil and confining pressure on consolidation during cyclic loading. Rate of consolidation is found to increase with increase in cyclic stress ratio and confining pressure and decrease in frequency of loading. Further, the proposed analytical model agrees well with the published data which indicate that it may be used by the practising engineers for prediction of consolidation under long-term cyclic loading.