砂质海床中锚板基础水平振动动力特性研究

贺瑞; 王立忠

doi:10.11779/CJGE201511024

砂质海床中锚板基础水平振动动力特性研究 English Version

贺瑞,
王立忠

1. 河海大学港口海岸与近海工程学院,江苏南京 210098;
2. 浙江大学建筑工程学院,浙江杭州 310058

基金项目: 国家杰出青年科学基金项目（51325901）; 国家自然科学基金面上项目（51279176）; 江苏省自然科学基金项目（BK20150804）; 中央高校基本科研业务费项目（2015B00514）

详细信息

作者简介:
贺瑞(1987- ),男,四川巴中人,博士,讲师,主要从事海底基础与土的动力相互作用研究。E-mail: herui0827@163.com。

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出版历程
- 收稿日期: 2014-09-07
- 发布日期: 2015-11-19

Horizontal vibration of a deeply buried plate anchor in sandy seabed

1. College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China;
2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China

摘要

摘要: 基于埋置在耦合海水-海床半空间中刚性、无重量圆盘基础的水平振动动力阻抗^[1],简单讨论了海洋工程中常用的承受竖向拉力的、有自重的锚板基础在水平波浪动荷载下的振动情况。给出了计算深埋锚板基础在发生共振时的共振频率和放大系数的简化计算公式。最后通过采用实际的海床砂土参数及锚板参数,得出了只要锚板的厚径比满足一定的要求,深埋锚板基础一般不会发生共振的结论。对于真实的深埋锚板基础,这个厚径比要求一般是较容易满足的。此外,锚板水平位移对低频海洋波浪水平荷载的频率变化并不敏感,最大水平位移发生在频率为0即静载情况下。本文结论对于理解海洋工程中锚板基础在水平波浪荷载作用下的振动特性有所帮助。
- 海水-海床半空间 /
- 深埋锚板基础 /
- 水平振动
Abstract: Based on the dynamic impedance of a massless rigid disc buried in a coupled seawater-seabed half-space (He and Wang, 2013), the horizontal vibration of a widely used deeply buried plate anchor is studied, which is subjected to a constant vertical pull force and with self-weight, under harmonic horizontal wave loads. Simplified formulas to calculate the resonance frequency and magnification factor are given. By using parameters of a real seabed and plate anchors, it is found that the resonance of the deeply buried plate anchor can be avoided if the thickness to radius ratio of the anchor satisfies some requests. For real plate anchors, it is very easy to satisfy the requests. Besides, the horizontal displacement of the deeply buried plate anchor seems to be independent of the frequencies of the wave loads, and the largest horizontal displacement occurs when the wave load frequency is 0. The results of this study will be helpful for understanding the horizontal vibration characters of the widely used deep sea plate anchors.
- coupled seawater-seabed half-space /
- deeply buried plate anchor /
- horizontal vibration

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参考文献(13)

[1]	HE R, WANG L Z. Horizontal vibration of a rigid disk buried in a poroelastic half-space in contact with a fluid half-space[J]. Soil Dynamics and Earthquake Engineering, 2013, 44: 38-41.
[2]	LUCO J E, WESTMAN R A. Dynamic response of circular footing[J]. Journal of the Engineering Mechanics Division, 1971, 97: 1381-1395.
[3]	VELETSOS A S, WEI Y T. Lateral and rocking vibrations of footings[J]. Journal of Soil Mechanics and Foundations Division, ASCE, 1971, 97: 1227-1248.
[4]	VELETSOS A S,VERBIC B. Vibration of viscoelastic foundations[J]. Earthquake Engineering and Structural Dynamics, 1973, 2: 87-102.
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[9]	ESKANDARI-GHADI M, FALLAHI M, ARDESHIR-BEHRESTAGHI A. Vertical and horizontal vibrations of a rigid disc on a multilayered transversely isotropic half-space[J]. Soil Dynamics and Earthquake Engineering, 2014, 61/62: 135-139.
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砂质海床中锚板基础水平振动动力特性研究 English Version

作者简介: 贺瑞(1987- ),男,四川巴中人,博士,讲师,主要从事海底基础与土的动力相互作用研究。E-mail: herui0827@163.com。

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Horizontal vibration of a deeply buried plate anchor in sandy seabed

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目录

作者简介:
贺瑞(1987- ),男,四川巴中人,博士,讲师,主要从事海底基础与土的动力相互作用研究。E-mail: herui0827@163.com。