面板堆石坝防渗面板受水库结冰影响的数值模拟  

Numerical Simulation of the Effect of Anti-seepage Panel of Concrete Face Rockfill Dam by Reservoir Icing

作　　者：申艳[1] 彭正 杨子强 

机构地区：[1]华北电力大学可再生能源学院,北京102206 [2]中国电建集团北京勘测设计研究院有限公司,北京100024

出　　处：《水电能源科学》2018年第3期87-90,共4页Water Resources and Power

基　　金：中央高校基本科研业务费专项资金项目(JB2015043)

摘　　要：为分析严寒地区混凝土面板堆石坝防渗面板受水库结冰影响,在考虑坝体填筑及水库降蓄水过程的基础上,通过施加静冰压力,研究了水库结冰对面板堆石坝坝体及面板的影响,并以西龙池抽水蓄能电站为例进行了分析。数值模拟采用有限元分析软件ANSYS,并利用其中的APDL二次开发功能,编制了邓肯—张E-B模型程序,用以建立坝体和坝面材料的应力应变关系,模拟加载卸载过程中弹性模量的变化,以得到冰荷载单独作用于面板及坝体的结果。研究结果表明,冰荷载前后对坝体的应力、应变和位移影响几乎可忽略不计;中间水位时,冰荷载对薄板的主应力值影响最大。研究为防渗面板采取相应的抗冰冻措施提供了依据。In order to analyze the influence of anti-seepage panel of concrete faced rockfill dam in severe cold area by icing of reservoir,on the basis of considering dam filling and reservoir water storage process,the effect of dam body and panel of concrete faced rockfill dam by icing of reservoir was studied by applying static ice pressure.Taking Xilongchi Pumped Storage Power Station as an example,numerical simulation was implemented by using finite element analysis software ANSYS.The secondary development functions called APDL was used to prepare Duncan-Zhang E-B model program.Then the stress-strain relationship of dam body and panel material was established to simulate elastic modules changes of loading and uploading process.The results that only the ice load acts on the panel and the dam body was obtained.Research indicates that the influence of stress and strain and displacement on the dam body before and after the ice load is almost negligible;in the middle water level,the ice load has the greatest influence on the principal stress value of the panel.The study provides the basis for anti-seepage panel to take the appropriate anti-freezing measures.

关 键 词：面板堆石坝 防渗面板 数值模拟 静冰压力 邓肯—张E-B模型 

分 类 号：TV642[水利工程—水利水电工程]