水平荷载作用下两桩相互作用系数的虚拟桩解法

FICTITIOUS PILE SOLUTION OF INTERACTION FACTORS BETWEEN TWO LATERALLY LOADED PILES

基于虚拟桩方法,将两桩相互作用的问题分解为弹性半空间扩展土和两根虚拟桩的叠加,其中虚拟桩的弹性模量等于桩的弹性模量与土的弹性模量之差。求解桩–桩间相互作用所需要的第二类Fredholm积分方程的间断点采用显式解,从而提高了该积分方程的数值计算精度,通过算例对比,验证了计算方法的正确性。最后进行了参数分析,结果表明两根桩在水平力单独作用下的转角相互作用系数与弯矩单独作用下的位移相互作用系数相等。

Based on the fictitious pile method, the problem is decomposed into an extended soil mass and two fictitious piles characterized respectively by Young＇s modulus of the soil and that of the difference between the pile and soil. The explicit solutions for the discontinuous point of the Fredholm integral equation of the studies are performed. shear-loading-only are loading-only. second kind is used, which improves the numerical accuracy. Finally, parametric The results indicate that the slope interaction factors between two piles due to found to be identical to the displacement interaction factors due to moment lading-only.