柱-墙下桩承台空间桁架模型有限元分析

Finite Element Analysis on Spatial Truss Model of Pile Cap under Column-Walls

在实际工程中,由于建筑的需要,经常会出现上部结构荷载传到承台的形式较复杂的情况,荷载并不仅仅只是以点荷载或线荷载的形式作用于承台,而是点荷载和线荷载同时作用的情况,即承台上同时作用有柱和墙的情况.本文通过对柱-墙下承台进行的有限元分析探讨,提出了柱-墙下承台按不同荷载情况的荷载等效方法,并进行了桩顶反力分析和误差分析,进而得出柱-墙下桩承台计算采用等效荷载的方法,同样可以按照空间桁架理论设计.

In practical engineering,complex situations when upper structure loads transmitting to platform are often appearing.Not only point load or line load acting on the cap,but also the point load and line load acting at the same time,namely the columns and walls are often both braced by pile caps in practical project.Finite element analysis was employed to analyze caps under column-wall in this paper.The equivalent load method is put forward and pile top loads and error analysis were done.Furthermore,it is presented that the spatial truss design method can also be applied for thick pile caps under any type load after loads equivalent simplification.