%0 Journal Article %T Analytical simulation of passive and pre-tensioned grouted rockbolts performances in bedding rock slopes %J Amirkabir Journal of Civil Engineering %I Amirkabir University of Technology %Z 2588-297X %A Rashedi, Mir Mahdi %A Ranjbarnia, Masoud %D 2020 %\ 08/22/2020 %V 52 %N 6 %P 1485-1498 %! Analytical simulation of passive and pre-tensioned grouted rockbolts performances in bedding rock slopes %K Rock slope %K Active and passive rock-bolt %K Inclination of the bolt %K Pre-tensioned force %K Analytical modeling %R 10.22060/ceej.2019.15415.5914 %X Rockbolts are one of the best systems to stabilize plane failure of rock slopes. The passive bolts are loaded and activated when rock block slides while pre-tensioned types are initially loaded before any rock sliding. The pre-tensioned rock bolts make the rock layers pressed together and the friction between them is activated before slipping, and probably no displacement between the layers is occurred. If a slippage occurs after the installation of a pre-tensioned rock-bolt, an excessive load is applied. In this paper, the bolt contribution generated by the pre-tensioned and passive rock-bolt in discontinuity is analytically simulated, and the effect of roughness angle, inclination of the bolt to the joint plane, pre-tensioned force, and strength of the rock are evaluated. For modeling, it is assumed the sliding imposes a bending moment to the rockbolt, which leads two plastic hinges to be created. The part of the bolt between two hinges (located on either side of the joint) is considered a beam with two cantilever supports, which is loaded by a uniform distribution generated by surrounding grout/ rock. The results showed that the pre-tensioned rock-bolts are effective when the resistance of the rock or grout around the bolt is high. %U https://ceej.aut.ac.ir/article_3276_e8be7bcec5e859de2a33c5ce5a0477f9.pdf