Research on Anchor Characteristics of Anchorage Body Consideration of Bolt Corrosion
First of all, parameter model of bond strength after bolt corrosion is built consideration of the own characteristics of mortar bolt anchorage; second, the whole process of mortar cover cracking is simulated by numerical method using the thinking of interface assembly in mechanical industry for reference; and at last, the results of above two are used to analysis anchor characteristics in anchorage body after bolt corrosion. The analysis result shows that before mortar cover cracking, bond stress increases with the improvement of bolt corrosion ,and the max stress can be obtained when mortar cover begin to crack and after that the bond stress begin to decrease ,the min stress is got just at the time that the mortar cover crack completely. After mortar cover cracking, the peak value of bond strength in bolt-mortar interface and mortar-rock interface will move to deeper place and the distribution of bond stress in effectively anchored length tends to be uniform in high stress level.
Hui Li, Yan Feng Liu, Ming Guo, Rui Zhang and Jing Du
H. Xu "Research on Anchor Characteristics of Anchorage Body Consideration of Bolt Corrosion", Advanced Materials Research, Vols. 374-377, pp. 2497-2504, 2012