Modelling of pile wave barriers by effective trenches and their screening effectiveness
Modelling of pile wave barriers by effective trenches and their screening effectiveness
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DOI：
10.1016/s0267-7261(98)00032-3
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发表时间：
1999-01-01
影响因子：
4
通讯作者：
Beskos, DE
中科院分区：
文献类型：
--
作者：
Kattis, SE;Polyzos, D;Beskos, DE
为了降低模型的复杂性，在用有效槽代替排桩模型的基础上，对排桩隔振的三维问题进行了数值研究。分析采用了一种先进的频域边界元方法，该方法同时适用于填土沟槽和土介质，并结合了基于在沟槽-土界面执行平衡和相容性的耦合过程。假定桩和土都具有线弹性或粘弹性。桩可以是管状或实心的，有圆形或方形的横截面。振源为竖向力，随时间谐波变化，桩排起被动波障作用。利用纤维增强复合材料力学中众所周知的均质化技术构建了有效沟槽模型，并将其精度与严格的边界元分析进行了比较，该边界元分析是在充分接触土壤介质的情况下对每个桩单独建模的。在有效沟模型的基础上，通过参数化研究对排桩的筛分效果进行了研究。1998爱思唯尔科学有限公司版权所有。
The three-dimensional problem of isolation of vibration by a row of piles is studied numerically on the basis of a model replacing the row of piles by an effective trench in order to reduce the modelling complexity. The analysis is accomplished with the aid of an advanced frequency domain boundary element method, which is used for both the infilled trench and the soil medium in conjunction with a coupling procedure based on enforcement of equilibrium and compatibility at the trench-soil interface. Linear elastic or viscoelastic material behaviour is assumed for both the piles and the soil. The piles can be tubular or solid and have circular or square cross-section. The vibration source is a vertical force, harmonically varying with time, and the row of piles acts as a passive wave barrier. The effective trench model is constructed by invoking well known homogenization techniques used in the mechanics of fibre-reinforced composite materials, and its accuracy is compared against a rigorous boundary element analysis modelling each pile separately in full contact with the soil medium. On the basis of the effective trench model, the screening effectiveness of a row of piles is studied through parametric studies. (C) 1998 Elsevier Science Ltd. All rights reserved.