A rough-joint model of DEM considering roughness effect

C. C. Chiu, Meng-Chia Weng

研究成果: Conference contribution同行評審

摘要

To consider the roughness effect on shear strength and deformation of rock joint, this research proposed a joint model for the discrete element method. The background theory of the proposed model is based on Barton’s shear strength criterion which is widely used to describe non-cohesive joint with roughness. To implement Barton’s criterion in DEM software, three calculation modifications were performed, including exceeded force recapture, contact area equalization, and stiffness adjustment. Through the modifications, the force of each joint contact could be calculated, which reasonably reflect the joint mechanical behavior under different normal stress. Afterward, the proposed model was verified by comparing to the theoretical model. The results indicated that the proposed model rationally describes the shear stiffness influenced by mobilized joint roughness coefficient during the shear process. The comparisons showed that the proposed model is versatile in simulating the shear displacement with loading-unloading-reloading cycles, normal closure, and shear dilation of joint.

原文English
主出版物標題ISRM International Symposium - 10th Asian Rock Mechanics Symposium, ARMS 2018
發行者International Society for Rock Mechanics
ISBN(電子)9789811190032
出版狀態Published - 1 一月 2018
事件10th Asian Rock Mechanics Symposium, ARMS 2018 - Singapore, Singapore
持續時間: 29 十月 20183 十一月 2018

出版系列

名字ISRM International Symposium - 10th Asian Rock Mechanics Symposium, ARMS 2018

Conference

Conference10th Asian Rock Mechanics Symposium, ARMS 2018
國家Singapore
城市Singapore
期間29/10/183/11/18

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