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为了研究胶凝砂砾石坝的抗震性能,以我国正在修建的第一座胶凝砂砾石坝永久性工程守口堡工程为例,同时考虑了地基的辐射阻尼效应,采用三维有限元分析方法进行地震动力时程分析.同时,为探讨这种新坝型的特性,将它与同等高度的常规混凝土重力坝进行了对比,分析在地震作用下的动力响应时程分布规律.研究结果表明:胶凝砂砾石坝的地震动力响应动位移、加速度、动应力整体处于较低的水平,对比同等高度重力坝,动力响应水平有明显的降低,体现出了坝体结构型式和材料性能的特点.分析得出,在设计地震烈度作用下,胶凝砂砾石坝具有良好的抗震安全性能.
In order to study the seismic performance of the cement-sand gravel dam, taking the first permanent project of cement mortar dam under construction in our country as an example, taking into account the radiation damping effect of the foundation and using the three-dimensional finite element analysis method for earthquake Dynamic time history analysis.At the same time, in order to discuss the characteristics of this new type of dam, it is compared with the conventional concrete gravity dam of the same height to analyze the time-history distribution of dynamic response under the action of earthquake.The results show that gelation The dynamic response, the acceleration and the dynamic stress of the gravel dam are lower than the same height gravity dam, the dynamic response level of the gravel dam is significantly reduced, which shows the characteristics of the structure type and material properties of the dam. Out, in the design of seismic intensity, the cement sand gravel dam has good seismic safety.