铁道科学与工程学报2017，Vol.14Issue(8)：1565-1570,6.
桥上CRTSⅡ型板式无砟轨道混凝土疲劳寿命预测模型试验研究
Experimental study on fatigue life prediction model of concrete of CRTSⅡslab track on bridge
摘要
Abstract
To study the mechanical properties of concrete of CRTSⅡ slab track on bridge, static load tests were conducted on 5 track slab units, and then the mechanical parameters of track slab were analyzed, including cracking load, ultimate load, cracking moment and failure moment. On this basis, theS-N curves of concrete applicable to the fatigue life prediction model of concrete of CRTSⅡ slab track on bridge under combined loads during service life were determined by combining Code for design of concrete structures (2010) and the domestic and foreign research results on fatigue properties of concrete structures. The results show that: the concrete strength values in Code for design of concrete structures (2010) can be adopted as tensile and compressive strength of concrete of CRTSⅡ slab track on bridge; the modified Song YupuS-N curve of concrete or Tepfers S-N curve of concrete modified by Goodman model can be adopted as theS-N curve of concrete of CRTSⅡ slab track on bridge. The research can provide experimental evidences for the establishment of fatigue life prediction model of concrete of CRTSⅡ slab track on bridge under combined loads during service life.关键词
桥上CRTSⅡ型板式无砟轨道/混凝土疲劳寿命预测模型/静载试验/S-N曲线Key words
CRTSⅡ slab track on bridge/fatigue life prediction model of concrete/static load test/S-N curve分类
交通工程引用本文复制引用
徐庆元,张泽,陈效平,娄平,魏琪,段俊..桥上CRTSⅡ型板式无砟轨道混凝土疲劳寿命预测模型试验研究[J].铁道科学与工程学报,2017,14(8):1565-1570,6.基金项目
国家自然科学基金资助项目(51178469) （51178469）
国家自然科学基金-高速铁路基础研究联合基金资助项目(U1334203) （U1334203）
中南大学中央高校基本科研业务费专项资金资助项目(2015zzts239) （2015zzts239）
