摘要
对非线性弹性材料桩身完整性检测的低应变反射波新方法进行了研究。建立非线性弹性材料桩问题的一维波动新模型,给出了控制体的动力学方程;利用一维非线性弹性本构关系推导出桩轴向力与轴向应变的关系;提出了研究一维非线性弹性波动问题的新算法;数值模拟基桩桩顶速度(或位移、加速度)响应时程曲线。
A new reflection wave method is presented for inspecting the pile integrity of the non-linear elastic material under the condition of low strain. Firstly, a new one-dimensional model of the pile of non-linear elastic material is set up; secondly, the dynamic equation of controlled body is given; thirdly, the relationship between the axial force and the axial strain is derived by using the non-linear elastic constitutive equation of one-dimension; finally, a new method is presented for the one-dimensional wave propagation of the non-linear elastic material. The numerical simulation for the speed （or displacement, acceleration） responses of the pile head is given in the form of the time-history curve.
出处
《水利与建筑工程学报》
2008年第1期84-87,共4页
Journal of Water Resources and Architectural Engineering
关键词
非线性弹性
桩身完整性
低应变
反射波法
时程曲线
non-linear elasticity
pile integrity
low-strain
reflection wave method
time-history carve
