【摘要】 通过离散元方法的数值模拟，首先对清江高坝洲二期碾压混凝土围堰在爆炸载荷下的响应进行了分析，经 与实验结果比较，得到了较合适的材料参数；然后根据这些材料参数并结合实验提供的部分数据，分析了三峡三 期纵向围堰在爆炸载荷条件下的振动速度随离爆源距离衰减的变化规律，以及振动速度随时间的变化规律等。计 算结果表明，三峡三期围堰爆破拆除时振动安全问题集中在纵向围堰拆除，研究爆破载荷作用下纵向围堰的振动 响应是非常重要的。更多还原

【Abstract】 The responses of the second period RCC of Qingjiang under blasting loading are analyzed by DEM first. The material parameters are obtained by comparing the numerical results and those of the experiments. And then, with these material parameters and some data obtained from experiments, the decaying rules of the vibration velocities with distance and time of the three period longitudinal cofferdam of the Three Gorges under blasting loading are analyzed. It is shown that the vibration safety of blast dismantlement for the third period longitudinal cofferdam of the Three Gorges is the most important problem. Therefore, it is practical and important to study the responses of vibration of the third period longitudinal cofferdarn under blast loading.更多还原