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Showing 1 to 20 of 24 for “"interface shear"”.
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Interface Shear Strength in Lightweight Concrete Bridge Girders
… to develop composite action, adequate horizontal shear resistance must be provided at the interface. As lightweight concrete is increasingly being used in bridge designs, it is important to understand the horizontal shear behavior of lightweight concrete. The current AASHTO LRFD Specification …
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Effects of Freezing Temperature on Interface Shear Strength of Landfill Geosynthetic Liner
… few decades. The present work emphasizes the shear strength of geocomposite clay liner (GCL) and geomembrane interface in landfills. Using direct shear tests, shear stress was measured as a function of normal load to determine the values of interface frictional angle and adhesion of the …
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An Investigation into the Effects of Asperities on Geomembrane/Geotextile Interface Shear Characteristics
… system, which consists of multiple geosynthetics interfaces, the geomembrane/geotextile (GMB/GTX) interface is known to have relatively low shear strength. In an effort to mitigate sliding failure occurrence at the GMB/GTX interface, asperities have been incorporated into GMB manufacturing to …
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Analysis of interface and subinterface cracks with crack-face contact and interface shear yield zones
Plane strain problems for an interface crack, with two interface shear yield zones and one crack-face contact zone, and for a crack parallel to an interface between dissimilar materials, with crack-face contact zone near one of the crack tips, are studied. These interface crack and subinterface …
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Laboratory Investigation of the Effects of Temperature and Moisture on Interface Shear Strength of Textured Geomembrane and Geosynthetic Clay Liner
… the effects of temperature and moisture on the shear strength of textured geomembrane (T-GM) and geosynthetic clay liner (GCL) interface. Several landfill slope failures involving geosynthetics have occurred within the past three decades. Interface shear strength of T-GM/GCL is well documented …
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Comparative Assessment of Single & Double Interface Shear Strength Properties: A Case Study of a Landfill Project in the Western Cape Province, South Africa
… they have presented several new potential interfaces for shear failure, particularly on side-slopes and basins of conventional hole-in-ground type MSW landfills. In the laboratory, interface shear strength properties of either soil-geosynthetic or geosynthetic-geosynthetic are determined …
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Effect of grading and grain size on the friction characteristics of a sand/geotextile inteface
… It particularly focuses on the soil/geotextile interface behaviour. Geotextile reinforcements transfer a majority of the shear stress from the soil to the reinforcement and vice versa by friction. This interfacing ability manifested by the soil/geotextile frictional contact is very important in …
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Comparison of shear strength properties of textured polyethylene geomembrane interfaces in landfill liner systems
The interface shear strength between geomembranes and geosynthetics is a critical factor governing the stability of slopes that incorporate geosynthetics. In order to better characterise the shear properties of geomembranes, a wide-range of shear strength friction measurements were conducted. This …
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Enhancement of Shaft Capacity of Cast-in-Place Piles Using a Hook System
… the effect of passive inclusion on pile-soil interface shear strength behaviour, employing a modified direct shear test apparatus. The interface strength obtained for pile-soil specimens was found to significantly increase when passive inclusions were implemented. Residual friction angle for …
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Optimization of in-situ tack coat application rate and installation
Interface bonding between pavement layers is a key factor affecting the performance of any pavement structure. Over the years, several studies have been performed to better understand bonding between pavement layers. The first phase of this study was a laboratory assessment, which analyzed …
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Development of a testing approach for tack coat application rate at pavement layer interfaces
… addition to difficulties in compaction, lack of interface bonding can lead to serious pavement deterioration including slippage cracking, de-bonding, and early fatigue cracking, all of which eventually reduce the pavement service life. Several experimental programs and numerical research have …
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An Analysis of Non-Uniform Stress States in Finite Thin Film/substrate System: The Need of Full-Field Curvature Measurements
… in thin films. We derive the film stresses and interface shear stresses in terms of system curvatures and film thicknesses. They all feature a ""non-local"" dependence on curvatures, which make full-field measurement a necessity for the experimental inference of such stresses. We also extend the …
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Machine Learning Based Prediction of Reinforced Concrete Members’ Shear Friction Capacity
Shear friction theory describes the mechanisms by which shear forces are transferred across concrete-to-concrete interfaces. Shear transfer across a plane involves a complex interaction of several phenomena, such as concrete surface condition and cohesion, concrete strength, and steel reinforcement …
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Fibre cement boards as permanent formwork for reinforced concrete elements
… Durability index, bulk diffusion, and modified interface shear bond tests were conducted. The modified shear bond test demonstrated that a bond with sufficient strength could be attained but further research is required to determine whether the bond is capable of withstanding differentials …
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Influence of substrate moisture preparation on concrete overlay bond strength
… bond strength was established through interface shear testing. All substrates of the repaired specimens were subjected to a constant surface roughness and equally aged to prevent any differential shrinkage which may falsify bond strength readings. The bond strength results were plotted, …
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An experimental and analytic study of earth loads on rigid retaining walls
… lateral earth pressure theory and a vertical shear force theory. The compaction-induced lateral earth pressure theory was revised from a previous theory. The revisions improved the accuracy with which the theory models the hysteretic stress behavior of the backfill during compaction. The …
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An Examination of the Validity of Steady State Shear Strength Determination Using Isotropically Consolidated Undrained Triaxial Tests
The assessment of the shear strength of soil deposits after the occurrence of large strains is an important issue for geotechnical engineers. One method for doing so, the steady state approach, is based on the assumption that the steady state undrained shear strength is a unique function of the in …
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The influence of state on the capacity of driven piles in sands
… lower than those that were measured by means of interface shear box tests, and it was found that the correct friction angle could only be measured by interface ring shear tests taken to very large displacements. An examination of the literature showed clearly that available field data support the …
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A Laboratory and Field Study of Composite Piles for Bridge Substructures
… this research are to: (1) evaluate the soil-pile interface behavior of five composite piles and two conventional piles, (2) evaluate the long-term durability of concrete-filled FRP composite piles, (3) evaluate the driveability and the axial and lateral load behavior of concrete-filled FRP …
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Evaluation of bonded concrete overlays on asphalt pavements
… device, and indirect tensile strength. The shear strength and bond failure mechanism were measured on composite cores (bonded concrete-asphalt cores). The fine material fraction of the aggregate subbase and subgrade were classified according to AASHTO soil classification. Additionally, …
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