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Analysis on the Cause of Cracks of High RCC Dam in Cold and Arid Area
Author(s): 
Pages: 96-97,101
Year: Issue:  4
Journal: Yellow River

Keyword:  裂缝有限元高碾压混凝土重力坝寒冷干旱地区;
Abstract: 某高碾压混凝土重力坝地处寒冷干旱地区,施工中在其底部基础区发现裂缝.采用有限元法对裂缝坝段混凝土温度及应力变化过程进行了仿真分析.结果表明:混凝土应力与温度变化呈明显的负相关性,在混凝土升温阶段坝段内部应力以压应力为主,达到最高温度开始降温后逐渐出现拉应力区;持续时间在2d以上的连续降温对混凝土表面的危害较大;混凝土表面保温对削减寒潮冷击的作用比较显著,能有效防止混凝土开裂.
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