摘要
滨海混凝土浪溅区氯离子渗透是引起结构耐久性损伤的主要因素之一。本文针对滨海混凝土浪溅区,基于多场耦合有限元计算模型,在考虑氯离子渗透影响因素的基础上,采用数值模拟方法研究了边界条件变化对浪溅区氯离子渗透模拟的影响。研究表明降低边界湿度和氯离子浓度可以近似模拟浪溅区氯离子渗透的效果,且随着边界湿度的降低,湿度变化对氯离子渗透速率的影响迅速减小;通过采用动态离子和湿度边界可以较好地模拟浪溅区离子渗透过程,但需进一步考虑浪溅条件下边界离子的累积效应。
Chloride ion permeation is one of the main factors causing durability damage of coastal concrete.In this paper,the influence of boundary condition on chloride ion permeation simulation in the splash zone of coastal concrete is studied by numerical simulation method,based on the multi-field coupled finite element model and considering the influencing factors of chloride ion permeation.The results show that the decrease of boundary humidity and chloride ion concentration can approximate the chloride ion penetration in the splash area,and with the decrease of boundary humidity,the influence of humidity change on penetration rate decreases rapidly.The ion permeation process in the wave splash zone can be well simulated by using the dynamic ion and humidity boundary,but the cumulative effect of boundary ions under the splash condition should be further considered.
作者
韩迅
关云飞
张晨
朱洵
HAN Xun;GUAN Yunfei;ZHANG Chen;ZHU Xun(Geotechnical Engineering Department of Nanjing Hydraulic Research Institute, Nanjing 210024, China)
出处
《水利科学与寒区工程》
2021年第4期1-5,共5页
Hydro Science And Cold Zone Engineering
基金
南京水利科学研究院院基金项目(Y319006)。
关键词
混凝土
氯离子
浪溅区
渗透
concrete
chloride ion
splash zone
penetration
