Bounding surface plasticity model for jointed soft rocks considering overconsolidation and structural decay. (April 2019)

• Record Type: Journal Article
• Authors: Kang, Xiaosen; Liao, Hongjian
• Is Part Of: Computers and geotechnics. Volume 108(2019)
• Page Start: 295
• Page End: 307
• Publication Date: 2019-04
• Subjects: Bounding surface -- Jointed soft rocks -- Structural strength -- Structural decay -- Overconsolidation; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2018.12.029
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: This study investigates the strength and stress-strain relationship of jointed soft rocks using undrained triaxial compression testing. A bounding surface plasticity model considering overconsolidation and structural decay is proposed for jointed soft rocks. Specifically, a bounding surface concept is introduced for overconsolidation. A new structural decay formulation is derived based on unified strength theory to model the effect of a joint plane on the structural strength. A new hardening law considering structural decay is derived and verified by triaxial compression testing. Finally, the model applicability is demonstrated by triaxial compression testing on jointed soft rocks.