水温影响下有压水工隧洞结构稳定分析  

Stability Analysis of Pressurized Hydraulic Tunnel Under the Influence of Water Temperature

作　　者：丁少超 王亦陈 DING Shaochao;WANG Yichen(Zhejiang Water Conservancy and Hydroelectric Power Consulting Center,Hangzhou 310020,China)

机构地区：[1]浙江省水利水电技术咨询中心,浙江杭州310020

出　　处：《人民黄河》2020年第10期161-165,共5页Yellow River

摘　　要：为解决运行期有压引水隧洞温度荷载和均匀内水压力联合作用下的应力计算问题,采用有限元法分析隧洞运行期水温变化所产生的温度应力对衬砌应力场与应力极值的影响,通过ANSYS Workbench进行有限元分析,计算运行期不同水温影响条件下的应力分布情况,并对比了弹性力学法计算的温度应力极值。计算结果分析表明,在隧洞运行期混凝土水化热基本稳定后,水温为温度应力的主导条件,水温升高会增大衬砌径向拉应力。因此,对于夏季高温地区或高水温地区需调整隧洞衬砌的配筋,以适应水温产生的温度应力对隧洞衬砌结构的影响。Aiming at the stress calculation under the combined action of temperature load and uniform internal water pressure in the pressur⁃ized water tunnel during operation,the influence of temperature stress generated by the water temperature change during tunnel operation to the stress field and stress extreme value of the lining was analyzed by finite element method.The finite element analysis was carried out by ANSYS Workbench to calculate the stress distribution under the influence of different water temperatures during operation and compared the extreme values of temperature stress calculated by the elastic displacement harmonic method.The analysis shows that after the concrete hydra⁃tion heat is basically stable during the tunnel operation period,the water temperature is the dominant condition of temperature stress,and the increase of water temperature will increase the radial tensile stress of the lining.Therefore,it is necessary to adjust the reinforcement of the tunnel lining in the summer high temperature area or high water temperature area to adapt to the influence of the temperature stress generated by the water temperature to the tunnel lining structure.

关 键 词：水工隧洞 温度场 温度应力 应力分析 ANSYS Workbench有限元软件 

分 类 号：TV651[水利工程—水利水电工程]