摘要
面板堆石坝目前已成为水利工程中的主要坝型之一,研究不同库水模型对其动力特性和地震响应的影响具有重要的实际意义。以某混凝土面板堆石坝为例,主要探讨了不同库水模型对面板堆石坝自振特性的影响,并对库水可压缩性、不同库水位对面板堆石坝动水压力分布规律及动力响应的影响进行了分析。结果表明:坝体蓄水后堆石料的弹性模量增大,使面板堆石坝满库时的基频高于空库时的基频;与不考虑动水压力相比,考虑动水压力作用会降低坝体基频,但总体上不同库水模型对面板堆石坝基频的影响并不显著;库水可压缩性对面板堆石坝的动力特性和地震响应的影响不显著;当水位较高时,不考虑动水压力计算出的坝体动力响应会产生较大误差,且随着库水位的升高,动水压力对面板堆石坝动力响应的影响越来越明显。
Concrete-faced rockfill dams(CFRDs)have become a primary dam type in water conservancy engineering.Investigating the effects of different reservoir water models on their dynamic characteristics and seismic responses is of significant practical importance.Taking a concrete faceted rockfill dam as a case study,this paper mainly discusses the influence of different reservoir water models on the natural vibration characteristics of the panel rockfill dam,and analyzes the influence of reservoir water compressibility and different reservoir water levels on the dynamic pressure distribution law and dynamic response of the panel rockfill dam.The findings indicate that the elastic modulus of the stone material intensifies following the dam′s water filling,leading to an increase in the fundamental frequency of the panel-stone dam at full reservoir compared to that of an empty reservoir.Furthermore,the impact of diverse reservoir models on the fundamental frequency of the panel-stone dam is negligible compared to the scenario where dynamic water pressure is not considered.The reservoir′s compressibility has no substantial effect on the seismic response and dynamic characteristics of the panel-stone dam,although it is advised to consider the compressibility of the reservoir while computing to attain adequate outcomes.As the reservoir water level rises,the influence of hydrodynamic pressure on the dam's dynamic response becomes increasingly pronounced.
作者
刘远财
张水锋
张毅飞
LIU Yuancai;ZHANG Shuifeng;ZHANG Yifei(Zhejiang Zheneng Beihai Hydroelectric Power Co.Ltd.,Hangzhou 323907,China;Logistic Service Bureau of Yellow River Conservancy Commission,Zhengzhou 450003,China)
出处
《华北水利水电大学学报(自然科学版)》
北大核心
2025年第1期115-123,共9页
Journal of North China University of Water Resources and Electric Power:Natural Science Edition
基金
国家重点研发计划项目(2022YFC3005402)。
关键词
面板堆石坝
动水压力
动力响应
流固耦合
库水模型
concrete-faced rockfill dams
hydrodynamic pressure
dynamic response
fluid-structure interaction
reservoir water model
作者简介
第一作者:刘远财(1983-),男,高级工程师,从事水电站大坝运行安全管理方面的研究。E-mail:lyc1hp@126.com;通信作者:张水锋(1977-),男,工程师,硕士,从事水利水电工程技术方面的研究。E-mail:65953033@qq.com。
