文献类型：期刊文献

英文题名：Cumulative Deformation and Damage Evolution of Fiber Cement-Modified Iron Tailings under Cyclic Load

作者：Jiang, Ping[1];Chen, Ye Wen[1];Li, Na[1];Wang, Wei[1]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China

年份：2023

卷号：23

期号：4

外文期刊名：INTERNATIONAL JOURNAL OF GEOMECHANICS

收录：SCI-EXPANDED(收录号：WOS:000936644000006)、、EI(收录号：20230513463944)、Scopus(收录号：2-s2.0-85146957124)、WOS

基金：Acknowledgments This research was funded by the National Natural Science Foundation of China (Grant Number 41772311) and Zhejiang Provincial Natural Science Foundation of China (Grant Number LQ20E080042).

语种：英文

外文关键词：Cyclic load; Cumulative deformation; Damage evolution; Iron tailings

外文摘要：The wasted iron tailings have poor engineering properties. Using polypropylene fiber and cement to modify iron tailings and in road engineering is an efficient way to utilize iron tailings as a resource. Dynamic triaxial tests were used to investigate the cumulative deformation and damage evolution of fiber cement-modified iron tailings (FCITs) with different fiber contents (W-f) and dynamic static ratios (R-cr) under cyclic load. In a study of the cumulative deformation of FCIT, it was found that increasing R-cr results in the cumulative deformation of FCIT. However, adding fibers to FCIT could minimize cumulative deformation by up to 70%. Furthermore, with an increase of R-cr, FCIT gradually changed from plastic shakedown to plastic creep and finally realized the deformation behavior of incremental failure. A plastic shakedown creep prediction formula with an error within +/- 10% could be established according to the deformation behavior. The plastic shakedown creep prediction model could be further developed, and it was found that FCIT has the best deformation resistance when W-f = 0.75%. In the study of FCIT damage evolution, it was observed that adding fibers can improve the failure form of iron tailings under IF (incremental failure) conditions. The cumulative damage variable formula proved that the fiber significantly improves the cumulative damage of FCIT. However, when W-f > 0.75% and W-f < 0.75%, FCIT cumulative damage increased faster when W-f = 0.75%. W-f = 0.75% had the best effect on reducing FCIT cumulative damage.