基于施工期温度仿真的小湾高拱坝结构诱导缝设置效果分析

考虑施工期至运行期全过程瞬态温度荷载和水荷载的影响,采用无厚度的接触单元模拟诱导缝的工作性态,分别采用整体模型和子模型对小湾高拱坝坝踵附近诱导缝的设置效果进行了全面、深入分析.从整体仿真计算结果来看,小湾拱坝设上游结构诱导缝后,坝踵应力可以得到较大的改善,且对坝体的整体性影响较小.仿真计算结果为小湾拱坝结构诱导缝设计提供了科学依据.

Study on Effect of Setting Structure Joint for Xiaowan High Arch Dam

Effect of setting structure joint for Xiaowan high arch dam is discussed considering thermal stress and water loads from construction period to operation period. A no-thickness contact element is presented to simulate structure joint, uniaxial equivalent tensile softening model is adopted as constitutive model of dam concrete. FEM analysis is performed with the whole model and sub-model in this paper. The computation results show that the tensile stress on dam heel is released. Setting structure joint on dam heel has little influence on the whole structure of dam. The results can offer theory references for design of Xiaowan High Arch Dam,