【摘要】 对某堤坝结构进行了大型振动台模型试验,分析了在不同密度和不同水位条件下模型的抗震性能,研究了堤坝模型结构在微振和强振作用下的动力特性及地震响应。研究认为:微振条件下,堤坝结构处于弹性范围,具有明显的模态特性;在强振条件下堤坝结构响应加速度随输入地震加速度峰值的增加而增大;随着输入地震动强度的增加,堤坝结构卓越频率逐渐降低,加速度放大倍数逐渐减小,直至接近1。更多还原

【Abstract】 Based on large-scale model test of dam,the seismic analysis of dam considering the difference of density and water level,the earthquake-resistance properties of the models of dam structure are analyzed and draw that density and water level have influence on the dynamic property of models.The researches showed that the natural frequency of models decrease and the acceleration amplification factor at the top of models increases with the increases of excitation acceleration.更多还原