水力发电学报2011，Vol.30Issue(1)：114-119,6.
双江口心墙堆石坝动力特性的振动台模型试验研究
Shaking table model tests on dynamic characteristics of Shuangjiangkou high earth-rockfill dam
摘要
Abstract
Dynamic behaviors are studied by the shaking large-scale table tests of a whole model and a section model in gravity field, and the dynamic responses of the prototype earth-roekfill dam are predicted according to the similitude. This study shows that: ( 1 ) The natural frequency and damping ratio at different sampling points are nearly uniform under the vibration of fixed peak acceleration. This indicates a relatively stable vibration mode of the model dam;(2) The natural frequency is considerably lowered with the increase of seismic peak ground acceleration;( 3 ) The natural frequency and damping ratio are closely related to pre-vibrations. Previbration causes a lower natural frequency and a greater ratio, and its effect depends on its intensity; ( 4 ) Reservoir filling has a considerable impact on the natural frequency, and the frequency of a full reservoir is lower than an empty reservoir.关键词
水工结构/动力特性/振动台模型试验/高土石坝分类
建筑与水利引用本文复制引用
杨玉生,刘小生,刘启旺,陈宁,赵剑明,邢义川,杨正权,洪桂标,袁林娟..双江口心墙堆石坝动力特性的振动台模型试验研究[J].水力发电学报,2011,30(1):114-119,6.基金项目
国家自然科学基金委员会和二滩公司雅砻江联合基金项目(50639060)和水利部"948"创新项目(200929) （50639060）
