摘要
高速铁路桥梁-轨道系统结构复杂,对轨道结构进行精细化建模会导致研究效率低,有必要对其进行合理简化。为此,以高速铁路CRTSⅡ型板式无砟轨道-桥梁系统为研究对象,基于约束效应等效的设计原理,提出以等效弹簧模拟轨道约束效应的方法,建立考虑轨道约束效应的轨道结构简化模型,构建简化模型结构参数优化框架,利用遗传算法来获得等效弹簧最优刚度,最后从PEER地震数据库中随机筛选出10条地震波,对标准5跨高速铁路梁桥模型和简化模型进行地震分析。研究结果表明:简化模型的简化率高达90%,高速铁路梁桥模型地震响应计算时间为简化模型计算时间的8~10倍;简化模型与高速铁路梁桥模型的地震响应计算结果吻合良好,平均相对误差为3%,最大相对误差不超过5%。
The structure of high-speed railway bridge-track system is complex,and the fine modeling of track structure will lead to low efficiency,so it is necessary to simplify it reasonably.CRTSⅡplate-type ballastless track-bridge system of high-speed railway was taken as the research object.Based on the design principle of equivalent constraint effect,a method of simulating track constraint effect with equivalent spring was proposed,a simplified track structure model considering track constraint effect was established,and the structure parameter optimization framework of simplified model was constructed.The optimal stiffness of equivalent spring was obtained by genetic algorithm.Finally,10 seismic waves were randomly selected from the PEER seismic database,and the seismic analysis of the standard 5-span high-speed railway beam bridge model and the simplified model were carried out.The results show that the simplification rate of the simplified model is as high as 90%,and the calculation time of the high-speed railway girder bridge model is 8-10 times that of the simplified model.The seismic response results between the simplified model and the high-speed railway girder bridge model are in good agreement with each other,the average relative error is 3%and the maximum relative error is less than 5%.
作者
蒋丽忠
钟不凡
张云泰
周旺保
余建
赵胤婷
JIANG Lizhong;ZHONG Bufan;ZHANG Yuntai;ZHOU Wangbao;YU Jian;ZHAO Yinting(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Laboratory for High Speed Railway Construction,Changsha 410075,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第11期4424-4435,共12页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(U1934207,52078487,52178180,52268074)
中国中铁股份有限公司科技研究开发计划项目(2020-重点-02)
湖南省交通科技项目(202011)
中南大学前沿交叉研究项目(2023QYJC006)。
关键词
高速铁路桥梁
轨道约束
简化模型
遗传算法
high-speed railway bridge
track constraint
simplified model
genetic algorithm
