摘要
为了了解不同高程的地基弹性模量对拱坝应力和位移的影响,以某混凝土双曲拱坝为例,依据拱坝的受力特性将地基分为三种材料分区,对应三种分区选取了三种计算方案,采用有限元分析软件ABAQUS分析了三种方案下拱坝对地基弹性模量的响应特性。结果表明,坝体第一主应力较第三主应力对地基弹性模量的变化更加敏感;地基弹性模量小于坝体弹性模量的40%时,地基弹性模量对坝体的应力和位移影响最为显著;加大坝体中上部地基的弹性模量和降低坝体下部地基的弹性模量,均可降低坝踵处的第一主应力。
In order to study the relationship between the stress and displacement of arch dam and its foundation elastic modulus in different elevation, we use finite element analysis software ABAQUS to analyze a certain double-curvature arch dam. According to the force characteristic of arch dam, the foundation is divided into three kinds of material zone. Three calculation schemes are used to analyze the response characteristics of arch dam to foundation elastic modulus. The results show that the first main stress of the dam is more sensitive to the foundation elastic modulus than that of the third main stress; when the foundation elastic modulus is smaller than 40% of the dam＇s elastic modulus, the impact of foun dation elastic modulus on the stress and displacement of the dam is obvious; the first main stress of dam heel can be im- proved by increasing the elastic modulus of middle-top foundation and reducing the elastic modulus of bottom foundation.
出处
《水电能源科学》
北大核心
2013年第1期57-60,共4页
Water Resources and Power
关键词
拱坝
地基
弹性模量
应力
位移
arch dam
foundation
elastic modulus
stress
displacement
