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利用应力波曲线拟合识别桩身缺陷的一种反演方法
引用本文:张建霖,张灿辉,李命成. 利用应力波曲线拟合识别桩身缺陷的一种反演方法[J]. 工业建筑, 2004, 34(11): 54-57,53
作者姓名:张建霖  张灿辉  李命成
作者单位:厦门大学,建筑系,厦门,361005;厦门市建筑安全质量监督站,厦门,361000
摘    要:通过建立桩 -土系统的力学模型 ,给出了考虑桩土相互作用的应力波动方程的特征线解法 ,继而应用优化方法对桩身缺陷进行定量识别 ,在识别中利用完整桩的土参数反演以及对缺陷桩进行等效波阻抗反演和缺陷认定。数值模拟和工程桩实例表明 ,本方法对缺陷桩不仅能够较好地识别出来 ,而且对一次缺陷或二次缺陷的判断具有较高的反演精度。

关 键 词:桩基完整性检测  曲线拟合  优化方法

AN INVERSE METHOD OF PILE FAULTS' IDENTIFICATION VIA FITTING STRESS WAVE CURVES
Zhang Jianlin Zhang Canhui. AN INVERSE METHOD OF PILE FAULTS' IDENTIFICATION VIA FITTING STRESS WAVE CURVES[J]. Industrial Construction, 2004, 34(11): 54-57,53
Authors:Zhang Jianlin Zhang Canhui
Abstract:A mathematic model for pile-soil system is established. The method of characteristic lines to solve the stress wave equations is proposed considering the interactions of pile and soil.The optimization method can be used to quantitatively detect the faults in piles, where the soil parameters inversed from a model with complete pile are used to inverse the equivalent stress wave impedance for others with damaged piles and then identify their corresponding faults. Numerical examples of the simulation for experimental piles and of the detection for engineering piles show that the method gives the quite accurate results, especially for those with primary or secondary faults.
Keywords:integrity detection of pile foundation curve fitting optimization method  
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