Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 44 for “"dowel"”.
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Dowel-concrete contact characteristics
In this thesis, the dowel-pulling force and the dowel-concrete coefficient of friction were measured using a novel laboratory setup of vibrating wire strain gauges embedded in both the dowel and concrete. The gages are set to measure the shrinkage strain induced in the concrete that surrounds the …
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Stress concentration around dowel bars in jointed rigid concrete pavements
… magnitude and state of stresses induced around dowel bars were identified through detailed 3D Finite Element (3DFE) modeling of dowel jointed rigid pavement structures. Both straight and skewed joints were modeled using extremely fine meshing that allows accurate modeling of the friction and …
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Dowel-laminated timber from waste lumber offcuts: Towards structural component circularity
… components. This thesis proposes a typology for dowel-laminated timber (DLT) slabs built up from waste lumber offcuts. A mechanical model for a segmented DLT system composed of geometrically heterogeneous offcuts is developed. Prototypes of this mass timber system are fabricated and tested to …
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Dowel load transfer systems for full-depth repairs of jointed Portland cement concrete pavements
A design procedure is proposed for dowel load transfer systems in full-depth repairs of jointed Portland cement concrete pavements. Design traffic levels and joint faulting specifications are input to determine maximum allowable bearing stresses in the dowel load transfer system. Adjustments for …
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Press fit design : force and torque testing of steel dowel pins in brass and nylon samples
… samples were press fitted with hardened steel dowel pins. Press fit force and torque required to induce slipping were measured experimentally. Sample dimensions and material properties were utilized to predict expected force and torque levels, which were then measured experimentally. Brass …
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THE BOND STRENGTH OF ADHESIVE RESIN CEMENT: TIME DIFFERENTIAL BETWEEN CEMENTATION AND FINISHING OF CAST DOWEL-CORES
… BETWEEN CEMENTATION AND FINISHING OF CAST DOWEL-CORES By Purnima Joan Shahani, D.D.S., M.S.A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University.Virginia Commonwealth University, 2003Major Director: …
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An Experimental Investigation of Structural Composite Lumber Loaded by a Dowel in Perpendicular to Grain Orientation at Yield and Capacity
… three models: the yield theory-based general dowel equations, which are currently the standard for laterally-loaded connection design in the U.S., and two models based upon fracture mechanics. All material property inputs required by the three models, were measured in the experimental program …
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Characterization of stresses induced in doweled joints due to thermal and impact loads
A review of literature on dowel jointed concrete pavement response reveals that the effect of uniform temperature changes was neglected based on the assumption that concrete slabs can contract freely. The triaxial state of stresses that develop at the dowel concrete interfaces due to the …
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Performance of doweled concrete joints subjected to fatigue loading
… to the development of excessive stresses at the dowel/concrete interface. Recent studies indicated the existence of two types of stresses i.e. compressive stresses at the top and bottom of the dowel and tensile stresses at both sides of the dowel bar. These stresses are the primary concern as …
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Flow through Rigid Vegetation Hydrodynamics
… through a vegetation array simulated by rigid dowels. Velocity data were collected with a one dimensional laser Doppler velocimeter (LDV) under single layer emergent and submerged flow conditions, and through two layers of vegetation. The effects of dowel arrangement, density, and roughness are …
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Evaluation of jointed plain concrete pavement (JPCP) with FRP dowels
Objectives of this study are to evaluate FRP dowel bars as load transferring devices in JPCP under HS-25 static and fatigue loads and compare their response with JPCP consisting of steel dowels. Along with laboratory and field evaluations of JPCP with FRP and steel dowels, analytical modeling of …
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Stimulation of Western Australian Sandalwood (Santalum spicatum) oil production using multiple treatments [thesis]
… At each site, four treatments were applied: a dowel soaked with the plant hormone Methyl Salicylate (MeSA) and inserted into the tree (Treated Dowel treatment), a dowel with no MeSA inserted into the tree (Blank Dowel treatment), a drill hole left empty (Empty Drill treatment), and a section of …
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Numerical Modelling and Analysis on Structural Behaviour of Composite Slim-Floor Beams
… to predict the load bearing capacity of concrete dowel shear connector. Part 2: Based on test results of shear beams and flexural beams, FE models developed and validated, and parametric studies were carried out. According to FE results, the shear (in a weak cross-section) and bending resistance …
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Analysis of slab-on-grade pavement systems subjected to wheel and temperature loadings
… loadings are considered. Aggregate interlock and dowel bars may be taken into account as load transfer devices at the joints or cracks.
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Effect of Cracking on Lag Bolt Performance
… Paper Association's (AF&PA) publication General Dowel Equations for Calculating Lateral Connection Values, Technical Report 12 (TR-12). Additionally some other tests were conducted, including fracture, tension strength perpendicular-to-grain, lag screw connection inking, dowel embedment, specific …
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An Investigation of Nailed Connection Performance in a Cyclic Humidity Environment
… were investigated for application to the general dowel equations for calculating lateral connection values, the current basis for design of single dowel-type fastener connections between wood-based members. An x-ray density profilometer was used to observe the de-densification processes within the …
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Numerical Simulation of Reinforced Concrete Subjected to Multiaxial Stress Conditions
… crushing, aggregate interlock, bond slip, dowel action, shrinkage and creep. Because the reinforced concrete involves so many nonlinear phenomena interacting with one another, the formulation of a "complete" analytical model is very difficult. The focus of this study is cast on: (1) three …
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Analytical model for reinforced concrete under cyclic loading
… the pre-cracking response, aggregate interlock, dowel action and bond slip come into the picture of the post-cracking response.
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The Strength of Reinforced and Prestressed Concrete Beams Subjected to Combined Bending, Torsion and Shear
… 3) over-reinforced modes (3 cases) The effect of dowel action, aggregate interlock, uncracked concrete and spacing of stirrups on the resistance of app]. icd torque have been examined. The predictions of the proposed theories have been compared with more than a thousand test results available in …
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