碾压混凝土拱坝温度应力场仿真研究

拱坝是固结于基岩的空间壳体结构，体型较为复杂。针对拱坝易存在的温度裂缝问题，结合碾压混凝土拱坝的施工特点及进度计划，采用三维有限元浮动网格法进行温控仿真研究计算。计算结果表明：在高温月份控制碾压部位坝体混凝土的入仓温度，对不同区域碾压的混凝土进行初期、中期和后期冷却，最大温差和最大应力均可满足拱坝温控设计要求。计算结果为预防坝体混凝土开裂提供了重要理论依据。

Simulation of Roller Compacted Concrete Arch Dam Temperature Stress Field

Arch dam is a space shell structure which is consolidated on the foundation ,its shape is more complicated .In consideration of the temperature cracking of a roller compacted concrete (RCC) arch dam ,we have adopted the three-di-mensional finite element calculation in the process of temperature and stress field simulation and simulated the concrete dam construction process and feature of temperature and stress field simulation .This results are as follows :for the site of pouring in hot season ,the pouring temperature should be controlled .Meanwhile ,cool the concrete in different regions at early ,medium and late term respectively ,with the maximum temperature and stress meeting the design specifications of temperature control of arch dam .This research can provide significant foundation for the prevention of concrete cracking .