RCC拱坝典型碾压块温度场及温度应力仿真研究  

Temperature Field and Stress Simulation Computation and Research on a Typical Rolling Layer of RCC Arch Dam

作　　者：张浩[1,2] 张林[1,2] 陈媛[1,2] 杨宝全[1,2] 汪罗 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,成都610065 [2]四川大学水利水电学院,成都610065

出　　处：《中国农村水利水电》2015年第9期150-152,156,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51379139;51409179)

摘　　要：RCC拱坝由于其上升速度快、施工简单、超载能力强而得到广泛运用,但施工过程中层面散热不够,水化热温升较大,在周边基础的约束下而产生温度应力并可能导致温度裂缝,目前常采用分缝的方法释放过大的温度应力。结合某拱坝高温季节浇筑的碾压块,采用有限元方法,模拟了未分缝方案和2种分缝方案施工期的温度场及温度应力,总结了温度场的特点及变化规律,并对比分析了2种分缝方案对坝体温度应力的影响。RCC Arch Dam is widely used due to its rapid and simple construction ,strong overcapacity ,but the hydration heat tem‐perature rise is large because of the thermal dissipation of rolling layers is not enough in the construction process and under the sur‐rounding constraints ,the temperature stress of dams will arise ,which may lead to temperature cracks .The method of setting joints is widely adopted to release excessive tensile stress .The temperature field and thermal stress of a rolling layer compacted in the high temperature season during the dam construction period is simulated and the characteristics and variation law s of temperature and tem‐perature stress is summarized and the effect of temperature stress under different jointing schemes is evaluated by utilizing the finite element method in this paper .

关 键 词：RCC拱坝 水化热 温度场 温度应力 分缝 有限元 

分 类 号：TV315[水利工程—水工结构工程]