诊断桩结构故障的振动系统识别方法

A Vibration System Identification on Diagnosing Problems for Pile Structures

本文提出了一种诊断桩结构故障的振动系统识别方法。在理论分析方面,建立了一个“桩-土”系统的连续型动力学模型,并导出了其解析解,提供了用系统识别法诊断桩故障的理论依据;在试验分析方面,采用模态分析理论,通过实测传递函数。识别出“桩-土”系统的诊断参数,用于桩结构完整性检验及单柱承载能力评价。最后给出了几个应用实例,其诊断结论与实际开挖结果相当一致。

This paper presents a vibration system identification on diagnosing problems for pile structures. In theoretical analysis, a dynamic model of a continuous type of“pile-soil”structure system is established, and an analyticsolution is derived, which provides a theoretical basis for a system identification on diagnosing problems for pile structures. In experimental analysis, using the theory of the modal analysis and testing the transfer fuection, we have identified the diagnosing parameters of the“pile-soil”system, which has been used to examine the structure integrity and evaluate the bearing capa-city in a pile. Finally, several applicable examples for diagnosing problems for piles are given by using this method, and the results between diagnosing and digging a pile are very coincident.