左右岸日照差异对高拱坝下游坝面温度应力的影响  

Effect of Unsymmetrical Solar Thermal Radiation on Thermal Stresses of High Arch Dams

作　　者：王进廷[1] 杨剑[1] 金峰[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水力发电》2006年第10期41-43,共3页Water Power

基　　金：国家自然科学基金重点资助项目(50539020)

摘　　要：参照二滩拱坝运行期的坝体温度原型观测资料,拟合了我国某在建高拱坝在考虑下游坝面左右岸日照差异时的坝面温度分布,分析了此情况下坝体的应力状态,与规范温度荷载作用下坝体的应力状态比较分析表明,考虑了下游坝面左右岸日照差异后,在温度较低一侧坝面所产生的温度应力明显大于按照规范温度计算得到的应力,这说明规范温度荷载有可能低估了下游坝面温度较低一侧的温度应力,在高拱坝设计中需要关注。Referring to the monitoring temperature data of the Ertan arch dam in period of operation, the temperature distribution on the downstream face of a high arch dam, which is now under the construction in China, is modeled with considering the difference of the solar thermal radiation on the left and right abutments. The thermal stresses of the dam subjected to the assumed temperature field are analyzed. The comparison with those due to the temperature field suggested by Chinese design specification for concrete arch dams reveals that the stresses on the cold side are evidently higher. This phenomenon shows that the thermal stresses on the cold side may be underestimated by the specified temperature filed and should be noticed in the design of high arch dams.

关 键 词：高拱坝 日照差异 温度应力 原型观测资料 

分 类 号：TV315[水利工程—水工结构工程] TV642.4