铅厂水电站碾压混凝土重力坝施工期温度应力仿真分析

Simulational Analysis on Thermal Stress of Qianchang RCC Gravity Dam during Construction Period

碾压混凝土坝在施工中容易产生温度裂缝,影响大坝安全.采用三维有限单元法对铅厂水电站碾压混凝土重力坝4#表孔溢流坝段在坝体施工期时的变温度场应力场进行有限元仿真计算分析.分析结果表明:强约束区混凝土温差及浇筑时上下层温差均在规范规定范围内;坝体大部分区域内的应力水平满足允许应力控制标准.最后对可能出现温度裂缝的部位提出了相应的防裂措施.

Temperature cracks are quite common in the RCC gravity dam during construction period,which will do harm to dam safety.3D FEM is used to simulate the time-varying temperature field and the stress field of the 4# spillway surface section of the Qianchang RCC gravity dam during construction period.The analytical result shows that,the concrete temperature disparity within strong restraint area and the pouring period are both satisfying the requirement of specification.Meanwhile,the stress level within most are...