Earth pressures on modified suction caisson in saturated sand under monotonic lateral loading

Earth pressures on modified suction caisson in saturated sand under monotonic lateral loading
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单调侧向荷载作用下饱和砂土改良吸力沉箱的土压力

DOI:
10.1063/1.4966701
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发表时间:
2016-10
影响因子:
2.5
通讯作者:
Gao Yufeng
Gao Yufeng
中科院分区:
工程技术4区
文献类型:
--
作者:
Zhang Yukun;Li Dayong;Gao Yufeng

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改进的吸力沉箱(MSC)可用于支撑海上风力涡轮机。对饱和海积细砂中MSC土压力分布沿着分布规律进行了试验研究和数值模拟。结果表明,MSC和相应的规则吸力式沉箱的屈服强度在H-M空间中可以用线性关系表示。研究还发现,常用的分析沿着刚性板层土压力分布的Prasad和Chari方法能较好地预测规则吸力式沉箱的最大净土压力。然而,对于MSC,由于外裙部可以抵抗相当大的一部分横向载荷,Prasad和Chari方法高估了作用在MSC内部隔间轴上的最大净土压力。数值模拟结果表明,在极限状态下,外裙墙沿荷载方向的最大净土压力值最大。
A modified suction caisson (MSC) can be used to support the offshore wind turbine. This paper presents an experimental study and a numerical simulation on the earth pressure distribution along the MSC embedded in saturated marine fine sand. Results show that the yield envelops for the MSC and the corresponding regular suction caisson in the H-M space can be represented by a linear relationship. It was also found that the Prasad and Chari method, which is popular in analyzing the earth pressure distribution along lateral loaded rigid plies, can well predict the maximum net earth pressure on the regular suction caisson. However, for the MSC, since the external skirt can resist a considerable portion of the lateral load, Prasad and Chari method overestimates the maximum net earth pressures acting on the internal compartmental shaft of the MSC. Numerical simulation results indicate that in the ultimate limit state the maximum net earth pressure acting on the external skirt wall in the loading direction is lar...
裙边吸力沉箱对饱和介质砂中单调侧向荷载的响应
DOI: 10.1007/s13344-014-0046-z
发表时间: 2014-08
影响因子: 1.6
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