摘要
利用一维杆件波动理论,同时考虑导致应力波衰减的因素,将应力波衰减系数分为两部分定义:由桩身阻抗变化引起的应力波衰减系数及由桩周土阻尼等因素引起的应力波衰减系数;建立了桩身应力波传播更加合理的数值计算模型,并给出了桩基完整性动测试验时域曲线的模拟及反演公式。实例分析结果表明,此方法能较好地实现对动测时域曲线的定量分析。
The decay coefficient of stress wave was classified into two parts with the one-dimension wave theory of rod parts,while at the same time bringing into consideration the factors that result in the decay of the stress wave:the decay coefficient caused by the pile-body impedance,and the decay coefficient due to the soil damping effects around the pile,thus a more optimum mathematic model was introduced for the stress-wave transmission inside the pile-body.At the end of the paper,the simulation and inverse demonstration formula of the temporal domain graphics obtained from the tests were provided.It was proved by the experimental data that a better quantitative analysis for the dynamic testing of the temporal domain graphics could be realized with that approach.
出处
《四川建筑科学研究》
2004年第1期80-82,93,共4页
Sichuan Building Science
关键词
桩基
反射波法
时域曲线
定量识别
测试
foundation piles
reflex-wave-method
temporal domain graphics
quantitative identification
