Admissible stress fields and arching in piles of sand
Admissible stress fields and arching in piles of sand
复制标题
沙堆中的容许应力场和拱形
DOI：
10.1680/geot.2004.54.8.529
复制
发表时间：
2004
期刊：
影响因子：
5.8
通讯作者：
N. Park
中科院分区：
文献类型：
--
作者：
R. Michalowski;N. Park
锥形和棱柱形沙堆下的应力分布在底部中心处可能出现局部最小值。应力分布的“倾角”的出现受砂土沉积历史和基底挠度的影响。这种倾斜是由于堆芯中心的沙子堆积而造成的。本文建立了棱柱形砂桩的径向应力场，发现应力场呈倾斜分布，当靠近斜面的部分处于屈服状态而堆芯处于弹性状态时，应力场中的起拱作用得到加强。极限分析的静态方法被用来发现的倾向，以增加的反力的水平分量的增加，在一半的土堆。
Stress distributions under conical and prismatic heaps of sand can exhibit a local minimum at the centre of the base. Occurrence of the ‘dip’ in the stress distribution is affected by the sand deposition history and the deflection of the base. The dip is due to arching of sand over the centre core of the heap. Radial stress fields in prismatic piles of sand are constructed, and distributions with a dip indicative of arching are found. Arching is promoted in stress fields where the sections adjacent to the sloping surfaces are in the yielding state whereas the inner core of the heap is in the elastic state. The static approach of limit analysis is used to find that the tendency to arching increases with an increase in the horizontal component of the reaction under half of the mound.