摘要
为了研究混凝土水闸在长期服役下的结构性态演化过程,需要考虑混凝土材料的老化及劣化。由于混凝土材料的老化具有非平稳性和随机性,本文采用非平稳随机过程模拟水闸混凝土的老化过程,其中随机影响因子时变模型采用指数分布。为了进一步提高水闸三维有限元的模拟计算结果,在水闸混凝土底板与地基两者不同材料结构之间设置接触单元以满足两者变形的连续一致性。由工程实例可知,随着服役时间的增长,最大变形区在闸墩顶部,并且前期增加快,后期趋于收敛。说明该研究方法可以应用在服役期较长的混凝土水闸的结构稳定研究。
In order to study the structural state evolution process of concrete sluice under long-term service,the aging and deterioration of concrete materials need to be considered.Because the aging of concrete materials is non-stationary and random,this paper uses non-stationary random process to simulate the aging process of sluice concrete,in which the time-varying model of random influence factors adopts exponential distribution.In order to further improve the consistency between the three-dimensional finite element simulation results of the sluice and the concrete foundation.It can be seen from the engineering example that with the increase of service time,the maximum deformation area is at the top of the pier,which increases rapidly in the early stage and tends to converge in the later stage.It shows that the research method can be applied to the structural stability of concrete sluice with long service life.
作者
吴宇
郁怀光
张卫云
贾玉豪
Wu Yu;Yu Huaiguang;Zhang Weiyun;Jia Yuhao(Nanjing Water Planning and Designing Institute.Corp.Ltd.Nanjing,Jiangsu 210000;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing,Jiangsu 210098;Shanghai Investigation,Design&Research Institute Co,Ltd.,Shanghai 200335)
出处
《吉林水利》
2022年第7期5-8,17,共5页
Jilin Water Resources
基金
国家自然科学基金项目(51579085)。
关键词
水闸
混凝土
劣化
结构性能
非平稳随机模型
sluice
concrete
deterioration
structural performance
non-stationary stochastic model
作者简介
吴宇(1990-),男,江苏泰州人,硕士,工程师,主要从事水利工程设计与水闸稳定分析工作。
