基于荷载包络图的铁路道床-路基结构安定性分析  

Shakedown Analysis of Ballasted Track Structure Based on Load Envelope Diagram

作　　者：庄妍 王康宇 董晓强[1] 张军 苗晨曦 ZHUANG Yan;WANG Kangyu;DONG Xiaoqiang;ZHANG Jun;MIAO Chenxi(Collage of Civil Engineering, Taiyuan University of Technology, Taiyuan 030006, China;Key Laboratory for RC and PRC Structures of Ministry of Education, School of Civil Engineering, Southeast University, Nanjing 210096, China;College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;Shanxi Transportation Research Institute Group Co., Ltd, Taiyuan 030000, China)

机构地区：[1]太原理工大学土木工程学院,太原030006 [2]东南大学土木工程学院,混凝土及预应力混凝土结构教育部重点实验室,南京210096 [3]河海大学土木与交通学院,南京210098 [4]山西交通科学研究院集团有限公司,太原030000

出　　处：《太原理工大学学报》2020年第5期731-736,共6页Journal of Taiyuan University of Technology

摘　　要：将静力安定解析方法与数值模型相结合发展了一种高速铁路道床-路基结构承载性能安全评价的安定分析方法。通过引入安定荷载包络图,给出了某一结构组合和材料参数情况下道床-路基结构所能承受的最大荷载组合。研究结果表明:在任意给定的摩擦系数情况下,始终存在“最佳”的道床摩擦角、道床与基床表层的厚度比和弹性模量比,使得道床-路基结构在外荷载作用下具有最优的承载性能。研究结果在满足安全性和稳定性的前提下,可最大程度地发挥材料的塑性潜力,降低工程造价,也为合理评估高速铁路结构承载性能的安全性提供理论依据。The analytical shakedown solutions and numerical simulation were combined to develop a shakedown analysis method for the safety evaluation of bearing capacity of high-speed ballasted track structure.By introducing the load envelope diagram of shakedown load,the maximum load combination for a certain structure combination and material parameters was given.The results show that under any given friction coefficient,there are always"optimal"friction angle,thickness ratio and elastic modulus ratio of the ballast to the surface subgrade layer,so that the ballasted track structure has the optimal bearing capacity under the external load.Under the premise of meeting the safety and stability,the research results can make full use of the plastic potential of materials to the greatest extent,reduce the project cost,and provide theoretical basis for the reasonable evaluation of bearing capacity of high-speed ballasted track structure.

关 键 词：安定分析 荷载包络图 列车荷载 承载性能 

分 类 号：U238[交通运输工程—道路与铁道工程]