基于冻融损伤的重力坝抗冻耐久性分析
发布时间:2018-09-04 08:18
【摘要】:为进一步了解混凝土的抗冻耐久性,分析了基于Loland混凝土损伤模型推导的混凝土冻融损伤模型,并结合试验数据拟合得到了混凝土弹性模量、泊松比与冻融循环次数的关系,利用ABAQUS分析混凝土重力坝渗流场、温度场,并以此确定了混凝土大坝发生冻融损伤的区域,最终采用场变量模拟重力坝随冻融次数增加的稳定性。结果表明,混凝土大坝并非所有区域均发生冻融损伤,且试验得到材料抗冻耐久性并不等同于混凝土重力坝抗冻耐久性。
[Abstract]:In order to further understand the frost durability of concrete, the freeze-thaw damage model of concrete based on Loland damage model is analyzed, and the relationship among the elastic modulus, Poisson's ratio and the number of freeze-thaw cycles is obtained by fitting the test data. The percolation field and temperature field of concrete gravity dam are analyzed by ABAQUS, and the region of freeze-thaw damage of concrete dam is determined. Finally, the stability of gravity dam with freezing and thawing times is simulated by field variable. The results show that not all regions of concrete dams are damaged by freezing and thawing, and the test results show that the frost durability of concrete dams is not the same as that of concrete gravity dams.
【作者单位】: 三峡大学水利与环境学院;深圳粤源建设股份有限公司;
【基金】:三峡库区地质灾害教育部重点实验室(三峡大学)开放基金项目(2015KDZ12)
【分类号】:TV642.3
本文编号:2221521
[Abstract]:In order to further understand the frost durability of concrete, the freeze-thaw damage model of concrete based on Loland damage model is analyzed, and the relationship among the elastic modulus, Poisson's ratio and the number of freeze-thaw cycles is obtained by fitting the test data. The percolation field and temperature field of concrete gravity dam are analyzed by ABAQUS, and the region of freeze-thaw damage of concrete dam is determined. Finally, the stability of gravity dam with freezing and thawing times is simulated by field variable. The results show that not all regions of concrete dams are damaged by freezing and thawing, and the test results show that the frost durability of concrete dams is not the same as that of concrete gravity dams.
【作者单位】: 三峡大学水利与环境学院;深圳粤源建设股份有限公司;
【基金】:三峡库区地质灾害教育部重点实验室(三峡大学)开放基金项目(2015KDZ12)
【分类号】:TV642.3
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