Response of Monopile Foundations Under Cyclic Lateral Loading in Normally Consolidated Clay
Response of Monopile Foundations Under Cyclic Lateral Loading in Normally Consolidated Clay
复制标题
正常固结粘土中单桩基础在循环横向荷载作用下的响应
DOI：
10.17736/ijope.2018.jc734
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发表时间：
2018-12
影响因子：
0.8
通讯作者：
Huang Maosong
中科院分区：
文献类型：
--
作者：
Yu Jian;Leung Chun Fai;Huang Maosong
采用离心模型试验技术，研究了正常固结粘土中粘土在重复水平荷载作用下的变形特性。通过T型杆循环试验，建立了粘土的应变软化模型。应变软化模型的计算结果与位移控制重复荷载下的试验结果的比较表明，塑性应变的积累导致土壤的不排水抗剪强度和抗侧刚度的降低。进一步的测试在负载控制下进行。通过用应变软化模型解释桩身挠度的渐进变化，探讨了重复水平荷载作用下桩身侧向刚度退化的机理。
The behavior of monopile subject to repeated lateral loads in normally consolidated clay is investigated using centrifuge modeling technique. A strain-softening model of clay is characterized by T-bar cyclic tests. A comparison between the results with the strain-softening model and the test results on monopiles under displacement-controlled repeated loading reveals that the accumulation of plastic strain leads to a reduction in the soil undrained shear strength and lateral stiffness. Further tests are conducted under load control. By interpreting the gradual changes in the progressive pile deflection with the strain-softening model, the mechanism for the lateral stiffness degradation of monopiles subject to repeated lateral loads is discussed.