摘要
文章以建在强震区深厚覆盖层上的土石坝为研究背景,采用等效粘弹性模型,研究不同覆盖层厚度、不同坝高等工况下,地震对坝顶加速度和坝体位移的影响。研究表明随着覆盖层厚度的增加,加速度反应整体有减小的趋势,但是由于模型基频特性的影响,可能出现时大时小的状况;随着输入值的增大,大坝水平动位移逐渐增大。随着覆盖层厚度的增加,大坝水平动位移也逐渐增加。
Based on the built earth-rock dam on deep overburden and meizoseismal area,the paper analyzes the influence of earthquake on the dam crest acceleration and the dam body displacement under the different thickness of overburden and the different dam height by using the equivalent viscoelastic model.The results show that the acceleration has the decrease trend,but the changing circumstances may exist because of the influence of the model fundamental frequency characteristics.The horizontal dynamic displacement of dam will gradually increase with the input value increases.With the increase of overburden thickness is the same situation.
出处
《东北水利水电》
2011年第11期51-52,63,共3页
Water Resources & Hydropower of Northeast China
关键词
土石坝
深厚覆盖层
地震
加速度
位移
earth-rock dam
deep overburden
earthquake
acceleration
displacement
