地震作用下CRTS Ⅲ型板式无砟轨道行车安全性  

Vehicle running safety on CRTS Ⅲ slab ballastless track under earthquake

作　　者：娄平[1,2] 宫凯伦 赵晨 LOU Ping;GONG Kailun;ZHAO Chen(School of Civil Engineering,Central South University,Changsha 410075,China;Key Laboratory of Heavy Railway Engineering Structure of Education Ministry,Changsha 410075,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]重载铁路工程结构教育部重点实验室,湖南长沙410075

出　　处：《铁道科学与工程学报》2020年第1期1-7,共7页Journal of Railway Science and Engineering

基　　金：国家重点研发计划项目(2017YFB1201204);国家自然科学基金资助项目(51578552,U1334203);中南大学研究生自主创新探索项目(2018zzts650)

摘　　要：建立地震作用下车辆-CRTS Ⅲ型板式轨道系统振动模型及振动方程,并编制相关计算程序,分析地震动强度以及行车速度对行车安全的影响规律。研究结果表明:地震动强度和行车速度对CRTS Ⅲ型板式无砟轨道上行车安全有重要影响,安全性指标均随着两者的增大而增大,其中脱轨系数对地震动强度敏感性较高,行车速度对轮重减载率的影响较大,且地震动强度以及行车速度的增大会分别导致轮轴横向力和轮重减载率超出限值。研究成果对CRTS Ⅲ板式轨道的抗震设计具有指导意义。The vibration model and equation for the vehicle-CRTS Ⅲ slab track system under earthquake excitation were established, and the calculation program was compiled. The influence laws for earthquake intensity and running speed on the running safety of vehicle were analyzed. The results show that the earthquake intensity and vehicle running speed have an important impact on the vehicle running safety. The safety indices increase with the increase of the earthquake intensity and vehicle running speed. The derailment coefficient is sensitive to the earthquake intensity, and the vehicle running speed has a great influence on the wheel load reduction rate. The increase of earthquake intensity and vehicle running speed lead to the axle lateral force and wheel load reduction rate to exceed the limit value, respectively. This investigation has guiding significance for the seismic design of CRTS Ⅲ slab track.

关 键 词：CRTSⅢ板式轨道 地震激励 地震动强度 行车速度 轮重减载率 行车安全 

分 类 号：U213.212[交通运输工程—道路与铁道工程] U238