倾斜荷载下条形锚板破裂面与极限抗拔承载力  

Ultimate Uplift Capacity of Strip Anchor Plates and Position of Failure Surfaces under Inclined Loads

作　　者：张晓曦[1] 苏谦[2] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]高速铁路线路工程教育部重点实验室,成都610031

出　　处：《地下空间与工程学报》2014年第1期122-127,共6页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(51378441)

摘　　要：应用水平条分法与极限平衡原理研究了条形锚板的极限抗拔承载力、破裂面、土体性质和荷载方向的关系。将破裂面看成是由若干段组合而成的复合破裂面,并沿各段将锚板周围土体水平条分为多块体,在假设岩土体服从摩尔库伦屈服准则条件下,根据极限平衡原理,建立条形锚板极限抗拔承载力的多元函数,利用数学优化方法给出其最优解,从而可以给出条形锚板周围土体的破裂面及其对应的极限抗拔力。计算结果表明:(1)抗拔系数随着内摩擦角、粘聚力和上拔荷载方向角的增大而增大;(2)破裂面随着内摩擦角和粘聚力的增大而向锚板外侧方向移动。In this paper, the horizontal slice method is used to discuss the relation among the ultimate uplift ca- pacity, the failure surface, the soil parameters and the uplift load direction with M-C yield criterion. According to the limit equilibrium approach, the uplift capacity is calculated by dividing soil around the strip anchor plate into slices with regarding the potential failure surface as a group of several sectional planes. Then the multivariate function used to calculate uplift capacity is established and optimized. An approach presented in this paper can be used to deter- mine the failure surface shape and the magnitude of the ultimate uplift capacity of strip anchor plates. The results in- dicate that ： （ 1 ） uplift coefficient increases with internal friction angle, cohesion and the angle at vertical direction ; （2）the failure surface moves to the outside soil gradually with increasing the intemal friction angle and cohesion.

关 键 词：极限抗拔力 破裂面 条形锚板 多块体 

分 类 号：TU443[建筑科学—岩土工程]