堆石混凝土拱坝温度应力仿真及温控措施研究

为了研究堆石混凝土拱坝在有无温控措施条件下施工期和运行期温度应力分布的变化规律,围绕国内某一即将开工建设的堆石混凝土拱坝工程,设计了3种不同温控措施条件的工况,运用大型有限元分析软件SAPTIS,对堆石混凝土拱坝在不同工况下施工期和运行期的应力场和温度场进行了仿真分析,结果显示:在无温控措施条件下,坝体内部最大横河向拉应力达到2. 0MPa,存在开裂风险;在简易温控措施条件下,坝体内部最高温度为37℃,最大横河向拉应力为1. 45 MPa,满足温控防裂要求。由此可见,在堆石混凝土拱坝施工过程中,采用简单的温控措施即可满足温控防裂要求。

Study on simulation of temperature stress and temperature control measures for rock-filled concrete arch dam

In order to study the changing laws of temperature stress distributions of rock-filled concrete arch dam under the conditions with and without temperature control measures during construction period and operation period，the operation conditions with three different temperature measures are designed around a rock-filled concrete arch dam to be constructed in China，and then the stress fields and temperature fields of the rock-filled concrete arch dam under different operation conditions during construction period and operation period are simulatively analyzed with the large-scale finite element analysis software SAPTIS. The results show that under the condition without temperature control measures，the maximum internal cross-river tensile stress of the dam body reaches to 2. 0 MPa，with cracking risk. Under simple temperature control measures，the maximum internal temperature of the dam body is 37 ℃，and the maximum cross-river tensile stress is 1. 45 MPa，which can meet the relevant temperature control and anti-cracking requirement. Thus，it is can be seen that the temperature control and anti-cracking requirement can be met by only adopting simple temperature measures.