浆砌石重力坝加高中弹性模量对坝体的影响

Influence of Elastic Modulus in Heightening Masonry Gravity Dam to the Dam Body

通过对宝泉电站下水库大坝进行二维有限元分析,研究了浆砌石重力坝加高过程中,新、老坝体弹性模量的差异性对坝体位移及坝体受力的影响,结果表明:当新、老坝体材料弹性模量在一定允许范围内变化时,随着坝体弹性模量的增加,坝体的整体刚度增加,总位移随之减小;坝体内部垂向正应力对新、老坝体弹性模量变化不敏感,坝踵、坝趾垂向正应力对新、老坝体弹性模量变化敏感。

The paper analyzes the influence of difference of elastic modulus of the old and new dams to the displacement and compression of dam body in the study of heightening process of masonry gravity dam.The outcomes show that the monolithic stiffness of dam body increases and the total displacement decreases along with the increase of elastic modulus when the elastic modulus of the old and new dams varies within the allowable range and;the vertical normal stress in the dam is not sensitive to the variation of elastic modulus of the old and new dams and the vertical normal stress of dam heel and dam toe is sensitive.