裂纹传递矩阵与缺陷桩的频率响应

Wave Propagator across Cracks and Its Use in Calculating Frequency Response of Piles with Defects

本文通过引入裂纹传递矩阵,将传递矩阵法用于计算缺陷桩的频率响应,对具有颈缩、凸肚、裂纹等缺陷的试验桩进行了计算,得到与实测数据基本吻合的结果,为机械阻抗法等通过分析频响曲线对桩身质量进行评估的动测技术提供了理论基础。

Matrix of wave propagator across cracks inside piles is introduced, and applied to the frequency responses of piles with defects such as crack, hollow or swell segment. Numerical analysis is in agreement with experimental results. This theory presents a sound basis for the evaluation of the integrality of piles by impedance method and other dynamic testing technique based on the analysis of frequency response of piles.