铁道标准设计2017，Vol.61Issue(7)：42-45,4.DOI:10.13238/j.issn.1004-2954.2017.07.010
CRTSⅢ型减振板式轨道垫层刚度限值研究
Research on Stiffness Limitation of Anti-vibration Rubber Pad in CRTS-Ⅲ Slab Track
摘要
Abstract
In order to study the effect of stiffness of the anti-vibration rubber pad in CRTS-Ⅲ low vibration slab track on the durability of self-compacting concrete, a beam-body finite element model of elastic foundation is employed to study the stiffness limitation of the anti-vibration rubber pad and calculate the tensile stress, distribution and width of crack and the degree of damage of durability of self-compacting concrete under different stiffness of anti-vibration rubber pad in view of the combined effect of train load and positive temperature gradient. The results show that, with the increase of the stiffness, the tensile stress, the number and width of crack, the relevant damage of durability all increase. According to the durability requirement of the self-compacting concrete, the lower stiffness limit of the anti-vibration rubber pad is 20 MPa/m.关键词
CRTSⅢ型板式无砟轨道/减振垫层/刚度限值/自密实混凝土层裂纹/耐久性损伤度Key words
CRTS-Ⅲ slab track/Anti-vibration rubber pad/Stiffness limitation/Crack on self-compacting concrete/The damage of durability分类
交通工程引用本文复制引用
齐燕楠,刘学毅..CRTSⅢ型减振板式轨道垫层刚度限值研究[J].铁道标准设计,2017,61(7):42-45,4.基金项目
国家自然科学基金高铁联合基金(U1434208) （U1434208）
四川省科技计划项目(2106GZ0333) （2106GZ0333）
