【摘要】 基于岩石材料的弹塑性损伤理论,引入两个独立的损伤变量分别控制岩石的拉压行为,通过对地震荷载作用下边坡场地响应的有限无数值模拟,总结含裂隙的岩质边坡发生局部损伤软化、破坏的区域的扩展、演化过程和规律.结合对某大型水电坝坝址左岸的岩质边坡在强地震动载荷作用下(百年一遇、超越概率2%)发生破坏的数值模拟,揭示这类边坡滑坡的机理,并根据模拟的结果,对整治边坡破坏提出参考依据.更多还原

【Abstract】 Based on elasto-plastic damage theory of rock materials,the failure and fracture processes of rock slopes are numerically simulated with the site response of the rock slope under strong seismic loading,including the local damage evolution and the development of failure area.Two independent damage variables are introduced into the constitutive model to control the tension and compression behaviors of the rock materials. Although the characteristics of initial micro-cracks inherent in the rock materials are not considered in the constitutive model,their influence on the properties of rock materials is taken into consideration by reducing the corresponding moduli and strength.The interfacial characteristics between large cracks such as faults are considered as in the interface contact.The numerical simulation by finite element method is carried out for the failure of a practical rock slope on the left bank of a river with a large hydraulic power station under a strong seismic loading(in 100-year recurrent period and over a probability of 2%).The mechanism of landslide for such kind of fractured rock slope is analyzed.Some advices are proposed for prevention and treatment of the landslide according to the simulation results.更多还原