抗拔桩基承台的数值模拟研究

Study on numerical simulation of cushion cap for uplift pile

为进一步研究抗拔桩承台的应力分布情况,确定承台周边是否需要配置竖向钢筋,通过有限元方法对几种典型的抗拔桩承台进行了数值模拟。结果表明,抗拔桩承台与底板交界处存在较大的拉应力,如果不加区别地统一按普通承台配置钢筋可能会存在一定的工程隐患。承台周边配置适当的竖向钢筋是必要的。承台与底板交接处有较明显的应力集中现象,当承台高度与底板厚度相差较大时建议在承台与底板交接处设置加腋措施以减小应力集中。

In order to study on stress distribution of uplift pile cushion cap,to determine whether need to configure the base slab of vertical reinforcement,through the finite element method,the numerical simulation of several typical uplift pile caps was carried out. The results show that larger tensile stress appears in pile pile cap. There may be some engineering problems if indiscriminate unified by common platform configuration reinforced. It is necessary to properly equip some vertical reinforcement in the cap of uplift pile. There is obvious stress concentration phenomenon of cap and floor junction. When the thickness of cap and floor height difference is large,it is suggested a haunch measures to reduce the stress concentration in the cap and floor junction.