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采用三维有限元的时程分析法对小浪底水利枢纽发电排沙洞进水塔的分期跳仓施工过程及运行期进行仿真数值分析,得出各部位施工期的最高温度值和温度应力值及运行期各部位温度值和温度应力变化情况。计算结果表明,施工期温控重点是排沙进水段上部的厚顶板,最高温度达43.1℃,最大水平拉应力超过3.0MPa;运行期最大拉应力发生在塔筒侧墙上。
The time-history analysis of the three-dimensional finite element method was used to simulate the construction process and the operation period of the silt discharging tower of the Xiaolangdi Multi-purpose Project. The maximum temperature, temperature stress and operation during each construction period were obtained Period of various parts of the temperature and temperature stress changes. The calculation results show that the key point of temperature control during construction is the thick roof in the upper part of the sediment inflow section. The maximum temperature reaches 43.1 ℃ and the maximum horizontal tensile stress exceeds 3.0MPa. The maximum tensile stress during the operation period occurs on the sidewall of the tower.