铁道标准设计2017，Vol.61Issue(1)：1-5,10,6.DOI:10.13238/j.issn.1004-2954.2017.01.001
高速列车荷载作用下水泥乳化沥青砂浆层的应变速率研究
Research on Strain Rate of Cement Asphalt Mortar Layer under High-speed Train Load
摘要
Abstract
Cement asphalt mortar is mainly under the vertical load and in dynamic loading process. In order to study the strain rate of cement asphalt mortar layer of China Railway Track System ( CRTS) type I slab track, the finite element software ANSYS/LS-DYNA is used to establish a vertical vibration model for train-CRTS type I slab track-subgrade coupling system to analyze the strain rate of CA mortar layer and its influence factors based on wheel-rail coupling dynamic theory. The results show that the strain rate of CAM layer of CRTS I type slab is bigger than those of other foundation types, and with the increase of train speed and the thickness of CAM layer, the strain rate of CAM layer is increased. The strain rate of CAM layer of CRTS type I slab ranges from 4. 763 ×10-3/s to 2. 025 ×10-2/s under different conditions. Compared with the simulation strain rate, the strain load stipulated by Chinese regulation could not fully reflect the actual strain rate of CAM layer.关键词
高速列车/CRTSⅠ型板式轨道/水泥乳化沥青砂浆/应变速率/振动模型Key words
High-speed train/CRTS type I slab track/Cement asphalt mortar layer/Strain rate/Vibration model分类
交通工程引用本文复制引用
徐浩,林红松,颜华..高速列车荷载作用下水泥乳化沥青砂浆层的应变速率研究[J].铁道标准设计,2017,61(1):1-5,10,6.基金项目
国家自然科学基金(U1434208,51425804,U1534203) （U1434208,51425804,U1534203）
