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RISThermal-Stress-Aperture Coupled Model for Analyzing the Thermal Failure of Fractured Rock Mass
Publisher: ASCE
Abstract: When rock is subjected to thermal load, primary fractures in the rock will block the heat conduction and greatly affect the temperature distribution, which in turn modifies the distribution of thermal stress and, hence, ...
Evaluating Damage and Microcracking Behavior of Granite Using NMR Testing under Different Levels of Unconfined Compression
Publisher: American Society of Civil Engineers
Abstract: This work discusses the results from tests performed to investigate the damage and microcracking behaviors of granites. The samples, previously loaded to varying predefined stress levels and then unloaded to zero, were ...
Numerical Analysis of Degradation Characteristics for Heterogeneous Rock under Coupled Thermomechanical Conditions
Publisher: American Society of Civil Engineers
Abstract: The effects of high temperature on rock strength and deformation, and hence the integrity of rock structure, have been a significant issue for rock mechanics and engineering. This article adopts a coupled thermomechanical ...
Numerical Investigation on the Grouting Penetration Process of Quick-Setting Grout in Discrete Fractured Rock Mass Based on the Combined Finite–Discrete-Element Method
Publisher: ASCE
Abstract: In this study, a combined finite–discrete-element method (FDEM)-based grouting simulator, in which the effect of time-dependent rheological characteristic caused by grout hydration on grouting penetration is adequately ...
Numerical Investigation of Coupled Effects of Temperature and Confining Pressure on Rock Mechanical Properties in Fractured Rock Mass Using Thermal-Stress-Aperture Coupled Model
Publisher: ASCE
Abstract: The mechanical performance of rock mass subjected to the coupled influences of the elevated temperature and in situ stresses has always been a hot topic in underground rock engineering projects. In this study, a ...
An Improved Wave Velocity Model for Acoustic Emission Source Localization in Heterogeneous Rock Materials with Unknown Inclusions
Publisher: ASCE
Abstract: The accuracy of locating acoustic emission (AE) source location is closely related to the reasonability of the adopted wave velocity model. However, it is literally hard to obtain an accurate wave velocity model for a ...
Microscopic and Macroscopic Creep Damage Behavior and Constitutive Model of Sandstone Subjected to Static and Dynamic Coupled Loading
Publisher: American Society of Civil Engineers
Abstract: Understanding the instantaneous and creep mechanical responses of rocks subjected to the combined influence of static and dynamic loading is of great importance for designing underground works. This study developed an ...
Influences of the Height to Diameter Ratio on the Failure Characteristics of Marble under Unloading Conditions
Publisher: ASCE
Abstract: Failure characteristics of rocks under different loading and unloading conditions have been an important subject of laboratory tests. This study aims to investigate the influence of the height to diameter (H/D) ratio on ...