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首页> 外文期刊>Journal of Sound and Vibration >Identifying the foundation stiffness of a partially embedded post from vibration measurements
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Identifying the foundation stiffness of a partially embedded post from vibration measurements

机译：通过振动测量确定部分埋入式桩的基础刚度

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Foundations of posts such as lighting columns can suffer damage or deteriorate over time, rendering the post unsafe. Quick, inexpensive and non-intrusive measurement procedures are required to monitor periodically their structural integrity. This paper investigates the behaviour of beam-like structures with a view to identifying a suitable monitoring technique for post foundations. In this initial study a lighting column is modelled as a uniform rigid beam that is constrained by collocated equivalent translational and rotational springs. Expressions are derived for the equivalent spring constants as functions of foundation profile and depth.Modal and static responses are presented as functions of foundation properties. The inverse problem of identifying the foundation stiffnesses from response measurements is discussed. A simple method is proposed based on quasi-static stiffness measurements obtained from impact tests. The method is validated using measurements of a laboratory scale structure. (C) 2003 Elsevier Ltd. All rights reserved.
机译：诸如照明柱之类的柱的基础会随着时间的流逝遭受损坏或恶化，从而使柱不安全。需要快速，廉价且无干扰的测量程序来定期监视其结构完整性。本文研究了梁状结构的行为，以期确定合适的桩基础监测技术。在本项初步研究中，照明柱被建模为均匀的刚性光束，并由并置的等效平移和旋转弹簧约束。推导了等效弹簧常数的表达式，作为基础轮廓和深度的函数。模态和静态响应表示为基础特性的函数。讨论了从响应测量中识别基础刚度的反问题。根据从冲击试验获得的准静态刚度测量值，提出了一种简单的方法。通过实验室规模结构的测量验证了该方法。 （C）2003 Elsevier Ltd.保留所有权利。

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