中南大学学报（自然科学版）2023，Vol.54Issue(11)：4424-4435,12.DOI:10.11817/j.issn.1672-7207.2023.11.020
基于遗传算法的CRTS Ⅱ型无砟轨道简支梁桥纵向抗震简化模型
Simplified seismic model of CRTS Ⅱ slab ballastless simply supported beam bridge based on genetic algorithm
摘要
Abstract
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.CRTS Ⅱ plate-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%.关键词
高速铁路桥梁/轨道约束/简化模型/遗传算法Key words
high-speed railway bridge/track constraint/simplified model/genetic algorithm分类
交通工程引用本文复制引用
蒋丽忠,钟不凡,张云泰,周旺保,余建,赵胤婷..基于遗传算法的CRTS Ⅱ型无砟轨道简支梁桥纵向抗震简化模型[J].中南大学学报（自然科学版）,2023,54(11):4424-4435,12.基金项目
国家自然科学基金资助项目(U1934207,52078487,52178180,52268074) （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) （2020-重点-02）
湖南省交通科技项目(202011) （202011）
中南大学前沿交叉研究项目(2023QYJC006)(Projects(U1934207,52078487,52178180,52268074)supported by the National Natural Science Foundations of China （2023QYJC006）
Project(2020-major-02)supported by the China Railway Corporation Limited Science and Technology Research and Development Program （2020-major-02）
Project(202011)supported by the Transportation Science and Technology Program of Hunan Province （202011）
Project(2023QYJC006)supported by the Frontier Cross Research Programt of Central South University) （2023QYJC006）
