摘要
通过建立三维列车编组撞击有限元模型,获得不同列车编组、列车行驶速度、斜向撞击角度下列车的脱轨撞击荷载时程曲线。采用HHT时间积分法和混凝土塑性损伤模型,研究双层衬砌在不同列车撞击速度和撞击角度下,管片衬砌的应力、变形、速度、加速度、拉压损伤因子及损伤面积等动力响应。研究结果表明:列车撞击荷载主要与列车行驶速度、斜向撞击角度以及列车编组数量有关;撞击力时程曲线在一定条件下出现第2个峰值,动力响应随着列车撞击速度和撞击角度的增大而增大,受拉损伤平均值及其最大值均大于受压损伤平均值和最大值,得出拉压损伤与撞击速度和角度的相互关系。
A three-dimensional numerical analysis model of the train formation was established to obtain the time-history curves of the train impact force under different train formations, impact velocities and oblique impact angles. Based on HHT time integration scheme and concrete plastic damage model, the dynamic responses of the double lining shield tunnel caused by the impact force under different impact velocities and impact angles were studied, such as stress, displacement, velocity, acceleration, tension ＆ compression damage factor and damaged area of the segment lining. The results show that the impact force is mainly related to the train impact velocity, oblique impact angle and train formation, and the time-history curve of the impact force has a second peak interval under certain conditions. Dynamic response increases with the increase of the impact velocity and impact angle, and the average and maximum value of tensile damage are higher than those of compressive damage, respectively. The relationship between tension ＆ compression damage, the impact velocity and angle are obtained.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第9期3527-3534,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51178400
51278425
U1134208)
教育部新世纪人才支持计划项目(NCET-11-0713)~~
关键词
双层衬砌
列车撞击荷载
管片衬砌结构
动力响应
拉压损伤
double lining
train impact load
segment lining structure
dynamic response
tension and compressiondamage
