沥青混凝土心墙坝的应力及变形特性

The Stress and Deformation Properties of Asphalt Concrete Core Dam

基于三维有限元数值模拟技术,对某沥青混凝土心墙坝进行了应力及变形分析。计算中采用Duncan-Chang E-B模型作为坝体及心墙材料的本构模型,考虑蓄水后心墙上游堆石料的湿化效应,对大坝填筑和水库蓄水过程进行模拟,得到了竣工期及蓄水期两种工况下沥青混凝土心墙和坝体的位移、应力分布规律。计算结果表明,坝体及心墙的应力变形值均处在合理范围之内,坝体填料和心墙材料满足强度要求,为结构设计、施工提供了参考依据。

The stress and deformation of an asphalt concrete core dam is analyzed by 3D-FEM. The Duncan-Chang E-B model is adopted to describe the constitutional relationship of the dam body and core material, and the wetting deformation of upstream rockfill body is also considered. By simulating the process of the dam＇s filling and reservoir＇s storing,the stress and deformation rules of the dam body and asphalt concrete core during its filling and storing period are obtained. The results show that the stress and deformation of the dam body and the core are in the reasonable scope. The materials of the dam body and the core can satisfy the strength requirement. These can provide the reference for structural design and construction.