摘要
为了研究大跨度连续刚构桥在CRH2型动车组制动力作用下的性能,建立了线路–桥梁有限元分析模型。依据动车组的制动减速度特性曲线,计算了车体的制动力时程。利用线性插值原理,编程计算了钢轨各节点的制动力时程。将轨面各节点的制动力时程和竖向力时程施加于结构,利用Midas有限元软件进行了动力响应分析。结果表明,主梁纵向变形具有累积性;制动力和竖向力联合作用下,连续刚构桥的纵向位移普遍较小,墩底纵向弯矩也在规范静力取值范围之内,表明动车组制动情况下连续刚构桥处于安全状态。
To ascertain the performance of long-span continuous rigid frame bridge under the action of braking force of CRH2 EMU train, a finite element analysis model of track-bridge was established in this study. And then the braking force time-history of car body was calculated according to braking deceleration characteristic curve of the EMU train; also the braking force time-history of every rail node was programmed and calculated by the use of linear interpolation theory. Furthermore, the braking force time-history and vertical force time-history of every node on rail surface were applied to the structure, and the dynamic response was analyzed by means of finite element software Midas. Analysis results show that the longitudinal deformation of main beam has accumulative character; under the combined action of braking force and vertical force, the longitudinal displacement of continuous rigid frame bridge is generally small, and the longitudinal bending moment of the pier bottom is within the range of allowable static values which are stipulated in bridge standard code. All this suggests that the continuous rigid frame bridge is in a safe condition under the action of braking force of EMU train.
出处
《铁道标准设计》
北大核心
2014年第7期75-79,共5页
Railway Standard Design
基金
国家自然科学基金资助项目(51368018)
江西省教育厅资助项目(GJJ13324)
关键词
高速列车
制动
连续刚构
动力分析
high-speed train
braking
continuous rigid frame
dynamic analysis
