铁道标准设计Issue(3)：34-37,4.DOI:10.13238/j.issn.1004-2954.2016.03.008
CRTS-I型板式无砟轨道疲劳寿命研究
Research on Fatigue Life of CRTS-I slab Ballastless Track
摘要
Abstract
To study the fatigue characteristics of the slab ballastless track under the joint action of the train load and the environment temperature, a beam structure model of elastic foundation is established to calculate the maximum vertical stresses of every track layer under the action of train load and environment temperature based on CRTS-I slab ballastless. In combination with S-N curve of ordinary concrete structure fatigue life analysis equation and fatigue equation of CA mortar at different temperatures, the fatigue life of every structure layer of CRTS-I slab ballastless track within regular service period is predicted. Calculation results show that the maximum bearing stress of every track layer of CRTS-I slab ballastless track doesn’t exceed corresponding concrete strength within limited number of action. The corresponding fatigue life of all structural layers predicted according to the maximum stresses shows that the fatigue damage of CA mortar appears only after 25 ~30 years, and other layers of CRTS-I slab ballastless track will not experience fatigue damage within the prescribed period of 60 years, which meet the need for dedicated passenger line service life.关键词
板式无砟轨道/疲劳损伤/疲劳寿命/列车荷载/温度荷载Key words
CRTS-I slab ballastless track/Fatigue damage/Fatigue life/Train load/Temperature load分类
交通工程引用本文复制引用
李思云,杨荣山..CRTS-I型板式无砟轨道疲劳寿命研究[J].铁道标准设计,2016,(3):34-37,4.基金项目
国家自然科学基金(51278431) （51278431）
国家自然科学基金高铁联合基金(U1434208) （U1434208）
