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论文类型：期刊论文

发表时间：2017-09-01

发表刊物：INTERNATIONAL JOURNAL OF CIVIL ENGINEERING

收录刊物：Scopus、SCIE

卷号：15

期号：6A

页面范围：895-906

ISSN号：1735-0522

关键字：Strain wedge; p-y method; Nonlinear stress-strain relationship; Overconsolidated clays; Pile-soil interaction

摘要：This paper proposes a modified strain wedge (MSW) model for nonlinear analysis of laterally loaded single piles in clays. The MSW model is used to calculate the soil resistance under increasing pile deflection. The stress-strain behavior of clays in the MSW, which is needed to calculate the soil resistance, is described in terms of both hyperbolic and bilinear stress-strain relationships. The subgrade reaction modulus of soil below the MSW is assumed to equal the conventional subgrade reaction modulus and to remain constant under the lateral loading of the pile. The applicability of the proposed model was verified by eight case histories. The results indicate that (1) the predicted results are consistent with the measurements for all eight full-scale tested piles; (2) the bilinear stress-strain relationship is not recommended for clays because the clays usually have a large epsilon(50) and, thus, they exhibit a linear behavior in the MSW during loading; (3) the predicted pile response is less sensitive to the effective friction angle than to the undrained shear strength; and (4) the proposed MSW model applies to normally consolidated clays and to overconsolidated clays until they reach their peak strength.