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 134 for “"load transfer"”.
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Load transfer mechanism of fully grouted cable bolts.
… in mine sites, as a result of insufficient load transfer between the rock mass and the cable bolt. Numerous research studies have been conducted to understand the load transfer mechanism of cable bolts in the laboratory. However, there are many shortcomings in previous methods. This thesis …
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Mechanics of load transfer in cable-reinforced materials
… half-space and subjected to external axial load and torque is considered. Special attention is given to the constitutive properties of the cable, which exhibits coupling between extension and torsion. Displacement compatibility between cable and half-space is enforced through the use of …
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Pillar load transfer mechanisms in multi-seam mining
The mechanisms controlling pillar load transfer from an overlying seam to subadjacent workings is investigated. Mine geometry and geology are researched as major variables affecting interaction between contiguously placed seams. The thesis includes photoelastic experimentation, finite element …
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A laboratory investigation of load transfer in reinforced soil
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1992.
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Laboratory measurements of load-transfer in geosynthetic reinforced soils
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Ultimate Strength of the Local Zone in Load Transfer Tests
… of the ultimate strength of the local zone in Load Transfer Tests. The derivation of this new formulation is the result of the investigation of the ultimate bearing strength of plain and reinforced concrete blocks, concentrically loaded. A total of 199 bearing tests were performed on plain and …
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Numerical investigation of load transfer mechanisms in slopes reinforced with piles
… limit soil pressure on piles, to evaluate the load transfer mechanism, and to evaluate alternative means for estimating mobilized and limit loads on piles in piled-slope problems. It is found that limit forces predicted using 2-D, plane strain and 3-D analyses differ substantially. The computed …
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Axial load transfer in large scale physical model drilled shaft foundations
… type of deep foundation used to support heavy loads from superstructures such as buildings and bridges. Uncertainties exist in the axial load transfer behavior of drilled shafts subject to loading and unloading cycles. A better understanding of the changes in soil reload stiffness can lead to a …
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Leveraging Biomimicry and Additive Manufacturing to Improve Load Transfer in Brittle Materials
… designed shapes can be created to improve load transfer through structural members and foundations. Cross-sections can be optimized to carry load using less material, or even using weaker constituent materials, like soils, which are cheap and abundant. The goal of this research is to …
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Local Displacements and Load Transfer of Shape Memory Alloys in Polymeric Matrices
… the maximum wire displacements. The transient load transfer behavior of a one-way SMA ribbon in a room temperature cured polymer matrix was quantified using two-dimensional photoelasticity. The effects of residual stress were examined using high temperature cured matrices. In-plane …
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Load transfer from high-strength concrete columns through lower strength concrete slabs
… floor concrete to be used in the calculation of load carrying capacity of columns. The analysis reveals that Sec. 10.13 of the ACI code is not based on the appropriate parameters. The allowable ratio of 1.4 between the two concrete strengths within which there is no requirement to reduce the …
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Load transfer in the stiffener-to-skin joints of a pressurized fuselage
Structural analyses are developed to determine the linear elastic and the geometrically nonlinear elastic response of an internally pressurized, orthogonally stiffened, composite material cylindrical shell. The configuration is a long circular cylindrical shell stiffened on the inside by a regular …
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Impact of structure, material properties, temperature curling, and trafficking on load transfer efficiency
… temperature gradient and trafficking on load transfer efficiency of rigid airfield pavements. The current FAA mechanistic design procedure for rigid pavements assumes constant stress-based load transfer efficiency (LTE (S)) of 25% at the joints. The design procedure assumes the material …
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Influence of moving load, structure, temperature gradient, and wheel configuration on load transfer efficiency
… the interaction of pavement with vehicular loads and climatic conditions. The Federal Aviation Administration (FAA) uses a mechanistic design procedure, FAARFIELD, for the design of rigid airport pavements. The FAARFIELD (FAA Rigid and Flexible Iterative Elastic Layer Design) procedure is …
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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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Study of load transfer efficiency of airfield rigid pavement joints based on stresses and deflections
The concept of joint load transfer efficiency is very important and fundamental to Federal Aviation Administration's (FAA) airfield rigid pavement thickness design procedures. The FAA procedure assumes 25% of stress applied to the edge is transferred to the adjoining slab. Moreover, since it is not …
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Investigations into Flange Surface Friction Effects on Shear Stud Load Transfer in Composite Bridge Girders
… demands on shear studs during service-level loading consider only bearing load transfer, neglecting adhesion bonding and friction load transfer between the concrete deck and girder flange. Quantifying alternative load transfer mechanisms across the steel-concrete interface may result in …
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Nonlinear Analysis of the Load Transfer Mechanism in Rigid Pavement Systems Considering Various Interface Conditions
Various conventional definitions of load transfer efficiency, such as the efficiency based on displacement, stress and applied force, were studied. This study is the first to define load transfer efficiency based on the load transferred through the load transfer device. The results presented in …
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Multiscale modeling of the lumbar spine to investigate tissue-level load transfer during activities of daily living
… attributed to biomechanical factors. Repetitive loading of the spine during lumbar movements produces damage in innervated elements known to be sources of pain, with examples including: vertebral body fractures, intervertebral disc tears, endplate lesions, and abnormal disc stress. Thus, …
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Multiscale Modeling of the Effects of Nanoscale Load Transfer on the Effective Elastic Properties of Carbon Nanotube-Polymer Nanocomposites
… of CNT reinforcement in terms of interfacial load transferring is assessed for the non-functionalized and functionalized interfaces between the CNTs and polymer matrix using force field based molecular dynamic simulations at the nanoscale. Polyethylene (PE) as a thermoplastic material is …
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