Experimental and analytical investigations on nonlinear dynamic response of caisson-pile foundations under horizontal excitation
Experimental and analytical investigations on nonlinear dynamic response of caisson-pile foundations under horizontal excitation
复制标题
水平激励下沉箱桩基础非线性动力响应的试验与分析研究
DOI：
10.1016/j.oceaneng.2020.107431
复制
发表时间：
2020-07
影响因子：
5
通讯作者：
Liu Zonghui
中科院分区：
文献类型：
--
作者：
Tu Wenbo;Huang Maosong;Gu Xiaoqiang;Chen Hua-Peng;Liu Zonghui
复合沉管桩基础作为一种深水基础，由于海洋环境的复杂性，往往受到水平动力荷载和力矩的作用。本文对深水沉箱、四桩沉箱和八桩沉箱三种不同类型的深水基础进行了模型试验，研究了它们在不同激振力作用下的横向非线性动力特性。同时，还研究了冲刷深度对地基动力响应的影响。试验结果表明，激振力和冲刷深度对基础的振动幅值和共振频率有显著影响，具有明显的非线性特征。与沉箱相比，在沉箱下加桩后，振动幅值减小，共振频率增加，桩的构型也有影响。将实验结果与本文提出的简化动态Winkler分析模型的结果进行了比较。尽管它很简单，但在实验和计算的响应之间观察到了合理的一致性。此外，在CCPF模型中应用了标度律来讨论原型基础的动力行为。
As a deep-water foundation, composite caisson-pile foundation (CCPF) is usually subjected to horizontal dynamic loads and moments due to the complicated marine environment. In this study, model tests were performed on three different types of deep-water foundation, including caisson, caisson with four piles and eight piles to investigate their lateral nonlinear dynamic characteristics under various excitation forces. Meanwhile, the effect of scour depth on the dynamic response of the foundations were also studies. The test results indicate that the excitation force and scour depth significantly affect the vibration amplitude and resonant frequency of the foundations with an obvious nonlinear behavior. Compared with the caisson, adding piles beneath the caisson results in a decrease of the vibration amplitude and an increase of resonant frequency, and the configuration of the pile also has an influence. The experimental results are compared with the results obtained by a simplified dynamic Winkler analysis model proposed here. Despite its simplicity, a reasonable agreement between the experimental and the calculated responses was observed. Moreover, scaling laws have been applied in the CCPF model to discuss the dynamic behavior of the prototype foundation.
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影响因子：
5.8
作者：
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通讯作者：
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影响因子：
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DOI：
10.1016/0148-9062(79)90035-4
发表时间：
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