文献类型：期刊文献

英文题名：Fatigue performance of composite concrete structure specimen (CCS) in flexure

作者：Xu Gui-Hong Fang Dong Liu Zhen-Nan

第一作者：徐桂弘

通信作者：Xu, GH[1]

机构：[1]Guizhou Inst Technol, Dept Civil Engn, Guiyang 550003, Guizhou, Peoples R China;[2]Qual Supervis & Inspect Inst Guizhou Bldg Mat, Guiyang, Guizhou, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Dept Civil Engn, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2020

卷号：27

期号：7

起止页码：539-550

外文期刊名：MECHANICS OF ADVANCED MATERIALS AND STRUCTURES

收录：;EI(收录号：20193207292850);Scopus(收录号：2-s2.0-85070308690);WOS:【SCI-EXPANDED(收录号:WOS:000480207800001)】；

基金：This work was performed under grants from the Natural Science Foundation of China (grants no. 51508121 and no. 51868009) and Natural Science Foundation of Guizhou (grants no. J [2015]2063, No. LH[2016]7096, and No. LH [2014] 7374). These foundations are greatly appreciated.

语种：英文

外文关键词：CRTS II slab track; fatigue behavior; flexural strength

摘要：The paper presents a study on the fatigue behavior of composite concrete specimen (CCS). An experimental program was conducted to obtain the fatigue-behavior of CCS at various stress ratios. Fifty-six CCS specimens of size were tested under four-point flexural fatigue loading. To evaluate the mechanical properties of the interface between CA mortar and concrete materials, a surface analysis technique of scanning electron microscopy (SEM) observation was used in this study. Parallel with the SEM observations, the pore size distribution of CA mortar was studied by using BJH method. It is found that there exist obvious differences of flexural fatigue behavior between CCS and plain concrete specimens. According to the theory of material mechanics, the formula of dynamic elastic modulus in flexure is deduced. Based on the experimental results, the formula of dynamic elastic modulus and analysis of fatigue strain, the fatigue cumulative damage evolution equation is proposed.