Degradation of lateral bearing capacity of piles in soft clay subjected to cyclic lateral loading
Degradation of lateral bearing capacity of piles in soft clay subjected to cyclic lateral loading
复制标题
循环侧向荷载作用下软粘土桩侧向承载力退化
DOI：
10.1080/1064119x.2018.1521486
复制
发表时间：
2019-09-14
影响因子：
2.2
通讯作者：
Liu, Ying
中科院分区：
文献类型：
--
作者：
Shao, Wei;Yang, Dongyan;Liu, Ying
本文对软土中桩在循环水平荷载作用下的水平承载力退化进行了数值研究。采用修正的运动硬化本构模型，模拟了循环荷载作用下软粘土的退化过程。通过将数值模拟结果与离心机模型试验结果进行对比，验证了修正模型的正确性。在此基础上，将修正后的模型应用于软土桩在水平循环荷载作用下的水平承载能力的数值模拟。研究了不同的循环位移水平和不同的循环次数后，软土中桩的水平承载力退化情况。研究表明，修正后的动力硬化本构模型能有效地预测软粘土中桩在水平循环荷载作用下的循环退化特性。在较少的循环次数下，极限侧向承载力的退化随着循环位移水平的增加而缓慢下降，在施加较多循环次数后，循环位移水平越高，退化越明显。
Abstract In this article, the degradation of the lateral bearing capacity of piles in soft clay subjected to cyclic lateral loading is studied numerically. A modified kinematic hardening constitutive model is employed to simulate the degradation of soft clay after cyclic loading. The modified model is verified by comparing the numerical simulation results with the results of centrifuge model tests. Furthermore, the modified model is applied to numerical simulations for evaluating the lateral bearing capacity of piles in soft clay subjected to cyclic lateral loading. The degradation of the lateral bearing capacity of piles in soft clay after different cyclic displacement levels and different numbers of cycles is investigated. The study reveals that the modified kinematic hardening constitutive model can effectively estimate the cyclic degradation behavior of piles in soft clay subjected to cyclic lateral loading. The degradation of the ultimate lateral bearing capacity progresses slowly with increasing cyclic displacement level for fewer cycles, and the degradation develops significantly at higher levels of cyclic displacement after applying a larger number of cycles.