综述:螺旋桩抗震性能的研究现状

A. B. Cerato, T. Vargas, S. Allred
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引用次数: 13

摘要

螺旋桩被用于美国和其他国家的地震带,然而,关于这种桩的实践状态和建筑规范仍然存在许多混乱。尽管如此,预计具有相对较小截面和高锚固能力的桩,如螺旋桩,由于其长细、较高的阻尼比、延性和抗顶端隆起,可能有利于抗震。此外,根据最新的地震规范,螺旋桩可以很容易地作为地基缺陷的改造解决方案。本文是螺旋桩用于抗震的三期研究的一部分。广泛的文献和行业搜索的结果,先前的地震试验进行了螺旋桩突出显示,以及目前的设计标准,在地震区使用。分析了现有的地震试验结果和现行的设计标准,提出了如何填补知识空白的建议,并提供了地震条件下螺旋桩行为的定量数据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A critical review: State of knowledge in seismic behaviour of helical piles
Helical piles are being used in seismic regions of the U.S. and other countries, yet there remains much confusion regarding the state of practice and building codes for this pile type. Nonetheless, it is anticipated that piles with comparatively small cross-section and high anchoring capacity, such as helical piles, could be beneficial for seismic resistance due to their slenderness, higher damping ratios, ductility, and resistance to tip uplift. In addition, helical piles can be easily implemented as a retrofitting solution for foundations that are found to be deficient according to updated seismic codes. This paper is part of three phase investigation on the use of helical piles for earthquake mitigation. The results of an extensive literature and industry search for previous seismic tests performed on helical piles are highlighted as well as the current design standards used in seismic regions. Existing seismic testing results and current design standards are analysed to make recommendations about how to fill the knowledge gaps and provide quantitative data on the behaviour of helical piles under seismic conditions.
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