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Showing 1 to 11 of 11 for “"rock joints"”.
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Strength of non-persistent rock joints
… modes of closed, persistent and non-persistent rock joints under biaxial loading. Previous investigations concerning the behavior of rock masses were conducted by simulating the rock mass as an assemblage of unit blocks. This arrangement is susceptible to rotation, imperfect contacts, and …
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Numerical modelling of dilatant rock joints
Aluminium forms a highly neurotoxic complex with maltol (3-hydroxy-2-methyl-4H-pyran-one). The stability of this complex has been determined using glass-electrode potentiometry. Owing to the effect on nuclear relaxation behaviour, paramagnetic contrast agents have immense diagnostic potential and …
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Shear strength and deformability of rock joints
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1979.
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Failure Mechanisms and Strength of Non-Persistent Rock Joints
… assumes full shear strength along joint and rock bridge is a useful reference condition. The Bridge Mobilized Strength Ratio, BMSR, provides a means of assessing how much of the reference strength along the bridge is mobilized. The MBSR is the ratio of (mobilized shear strength minus shear …
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A model for the time dependent behaviour of rock joints
… into the time-dependent behaviour of rock joints. Much of the research work that has been conducted to date in the area of finite element analysis has been involved with the development of special elements to deal with these discontinuities. A comprehensive literature survey is …
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Laboratory Investigation of Shear Behaviour in Rock Joints Under Varying Boundary Conditions
Discontinuities (joints, fractures, faults, bedding planes etc.) in rockmasses are an important mechanical component of a rockmass. In low to moderate in situ stress conditions where gravity-driven failure dominates, these discontinuities act as planes of weakness and govern the material response. …
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Experimental studies of scale effects on shear strength, and deformation of rock joints
… shear tests on different sized samples of large joints. A rubber moulding system is used to obtain impressions of the roughness from a variety of natural joint surfaces. A brittle model material is developed and used to cast several sets of identical interlocking specimens, which are in turn …
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Πειραματική διερεύνηση διατμητικής συμπεριφοράς ασυνεχειών βράχου με υλικό πληρώσεως
… TO THE PROBLEM OF THE SHEAR BEHAVIOR OF FILLED ROCK JOINTS. REPLICAS OF NATURAL ROUGH ROCK JOINTS WERE USED AS SPECIMENS MADE FROM A SPECIAL CEMENT BASED MODEL MATERIAL, WITH PROPERTIES REPRESENTING A COARSE GRAINED ROCK OF MEDIUM COMPRESSIVE STRENGTH IN PHYSICAL SCALE.THESE SPECIMENS WERE …
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Modeling gap effects in jointed rock
Joints represent planes of discontinuity in homogeneous media. The purpose of this investigation is to model joints and determine the e\ufb00ects on waves as they propagate through joints in rock. Properties of interest include energy dissipation, energy transmission, and changes in peak stress and …
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Failure Modes of Asperities in Rock Discontinuities
… between the peak shear strength of the rock joints and the applied normal stress.
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Detection and elimination of rock face vegetation from terrestrial LIDAR data using the virtual articulating conical probe algorithm
… For the case where vegetation is covering a rock face, the underlying rock surface is not smooth because rock joints and sharp block edges have a high spatial frequency very similar to the overlying vegetation. Traditional ALS approaches to eliminate vegetation take advantage of the contrast …