摘要
为了研究杆与试件接触摩擦效应对混凝土破坏过程的影响,建立了包含端部摩擦的数值模型,该模型的模拟结果与试验结果在峰值段吻合较好。在此基础上,对四种不同端部摩擦作用下的模型进行了模拟对比。结果表明,当摩擦系数超过0.2时,摩擦作用能有效地约束混凝土的破坏,同时其DIF也有一定的提高,因此当摩擦系数超过0.2时,在试验中应考虑接触摩擦的影响。
This paper presents a numerical simulation of dynamic impact tests on concrete specimens to study the in fluence of friction confinement. A numerical model is developed with friction confinement and the simulation results in peak part show good agreement with the tests. Furthermore, four models with different friction confinement are mod- eled. The results show that the friction can effectively confined concrete damage and improve DIF when the friction coeffi cient exceeds 0.2. Therefore, the friction confinement should be considered when it is greater than 0.2.
出处
《水电能源科学》
北大核心
2017年第1期141-144,179,共5页
Water Resources and Power
基金
国家自然科学基金专项仪器基金项目(51227006)
