双参数层状地基受水平荷载长桩的水平位移计算  

Solution to the Lateral Displacement of Lateral Loaded Long-piles under Double-parameter Layered-foundation

作　　者：张望喜[1] 占鑫杰[1] 易伟建[1] 肖岩[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2011年第3期17-21,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50678064;90815002);湖南省科技计划资助项目(2008FJ3122)

摘　　要：基于能量变分原理推导了双参数双层地基中受水平荷载长桩平衡微分方程和相应的边界条件以及中间各层地基相互联系的弯矩平衡、剪力平衡、位移以及转角连续条件,同样多层地基也可以用这些条件来联系.将平衡微分方程的解-位移函数代入弯矩平衡、剪力平衡、位移以及转角连续条件可以求得分段位移函数的系数,从而确定多层地基中受水平荷载长桩的水平位移曲线.算例分析表明地表硬层对多层地基中桩的水平位移有一定影响,桩直径增大到一定程度以后,其对水平位移的影响越来越小.The equilibrium differential equation and the corresponding boundary conditions of laterally loaded long-piles under double-parameter foundation on double-layered soil were deduced by means of energy variation principle.Meanwhile,the condition of moment equilibrium,shear equilibrium and the continuity condition of displacement and corner were used to relate the medium ground of layered soil.The coefficients of piecewise displacement function were derived by substituting the solution of equilibrium differential equation into the conditions of moment equilibrium,shear equilibrium and the continuity condition of displacement and corner,thus identifying the displacement curve of laterally loaded long-piles.Case study indicates,the stiffer layer on the earth surface can exert an influence on the displacement of pile,and as the diameter increases to some extent,its effect on the displacement of the pile is smaller.

关 键 词：双参数地基 层状地基 受水平荷载长桩 变分原理 

分 类 号：TU470.3[建筑科学—结构工程]