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工业建筑  2007 

不同桩土协调条件对饱和土中桩基础动力响应的影响

DOI: 10.13204/j.gyjz200708015, PP. 55-59

Keywords: Biot理论,,Fredholm积分方程,孔隙介质,协调条件

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Abstract:

对采用不同桩土协调条件时,饱和土中的单桩在P、SV波作用下的动力响应的差异进行研究。采用虚拟桩的方法,将桩土体系分解为虚拟桩和拓展半空间土的叠加。利用圆形荷载基本解,分别用竖向应变、竖向位移和水平转角、水平位移两种不同协调条件,建立桩土相互作用的第二类Fredholm积分方程。求解积分方程可得桩在P、SV波作用下的动力响应。数值结果显示两种协调条件所得结果除轴力有一定差别外,其他量数值上基本接近。研究成果可作为选择不同桩土协调条件研究桩土动力相互作用问题的重要依据。

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