摘要
冰的温度变形特性会对混凝土结构产生推力和拉拔力,尤其在严寒地区,冰冻期较长,温度梯度大,对混凝土结构影响更大。为探究实际冰压力对大坝安全影响,基于冰的温度特性采用有限单元法建立大坝在冰压力作用下的数值仿真模型,并结合实际工程,对大坝的变形和应力进行分析。结果表明:冰的膨胀力对大坝的变形和应力影响不大,最大变形为0.3 mm,冰盖处最大静冰压力为1.5 MPa,坝踵处出现0.6 MPa的拉应力,应当引起重视。
The temperature deformation of ice will produce thrust and drawing force on the concrete structure;especially in the severe cold area,with long freezing period and great temperature gradient,it has a greater impact on the concrete structure.In this paper,based on the calculation of the ice temperature characteristics by the finite element method,a numerical simulation model of the dam under ice pressure is established in combination with a practical project.The deformation and stress of the dam are analyzed by applying ice thermal expansion force on the upstream surface of the dam.The results show that although the expansion force of ice has little effect on the deformation and stress of the dam,the maximum deformation is 0.3 mm,the maximum static ice pressure at the ice cover is 1.5 MPa,and a tensile stress of 0.6 MPa appears at the dam heel,which should be taken seriously.
作者
阿曼·热夏提
鲍军
邓树森
孙康平
张峰
AMAN·Rexat;BAO Jun;DENG Shusen;SUN Kangping;ZHANG Feng(Xinjiang Uluwati Water Conservancy Project Management Bureau,Hotan 848000,China;Construction Management and Quality Safety Center of the Ministry of Water Resources,Beijing 100053,China;Beijing IWHR Corporation,Beijing 100038,China)
出处
《西北水电》
2024年第2期59-65,共7页
Northwest Hydropower
基金
国家重点研发计划(2017YFC1501201).
关键词
严寒地区
混凝土结构
冰冻影响
变形
应力
severe cold area
concrete structure
ice pressure effect
deformation
stress
