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 49 for “"vertical load"”.
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Understanding the vertical load path under static and dynamic loads in concrete crosstie and fastening systems
An understanding of the load path is necessary for developing a mechanistic design approach for the crossties and fastening systems. It is important to follow the flow of forces through the system to understand the demands on each individual component. In spite of extensive research focusing on the …
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Estimation of vertical load on a tire from contact patch length and its use in vehicle stability control
The vertical load on a moving tire was estimated by using accelerometers attached to the inner liner of a tire. The acceleration signal was processed to obtain the contact patch length created by the tire on the road surface. Then an appropriate equation relating the patch length to the vertical …
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Fracturing processes and induced seismicity due to the hydraulic fracturing of rocks
… setup was developed to simultaneously apply a vertical stress to rock specimens and a hydraulic pressure to pre-cut flaws with various geometries, leading to the initiation and propagation of new cracks. The test setup allowed one to obtain high-resolution and high-speed video images of the …
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Integration of a testbed for examining the interaction of Mars rover wheels with a Mars soil simulant
… of the Mars rover wheel. The testbed had a vertical carriage with a 6-axis load cell attached to measure vertical load and the tractive force developed by the Mars rover wheel. There was another motor and a torque sensor attached to the Mars rover wheel that controlled the angular velocity …
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Behaviour of multi-storey cross-laminated timber buildings under lateral loading
… seismicity would be subject to higher lateral loads due to wind and earthquakes than CLT buildings which have already been completed. The lack of structural design codes and limited literature regarding the performance of CLT buildings under lateral loading are barriers to the adoption of CLT …
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Railroad Tie Lateral Resistance on Open Deck Plate Girder Bridges
… girder, and hydraulic actuators to apply both vertical and horizontal load to a railroad tie specimen. The three main contributions to lateral resistance on open-deck bridges were identified as friction resistance between tie and girder due to vertical load from a truck axle, resistance from …
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Psychophysical assessment of load-carrying in internal and external-frame backpacks
… was used to determine whether slight changes in load position and comfort could have significant effects on the maximum backpack load acceptable to subjects. Four males and four females, who were accustomed to walking with backpacks, were given 15 minutes to adjust the load until it was, in their …
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Reinforced composite masonry shear walls
… panels subjected to gravity and in-plane shear loads are discussed herein. Eleven walls were tested. Each of the walls was made from two wythes of brick-to-brick or brick-to-block, with a nominal 2-inch collar joint. In the first 10 walls, the collar joint was grouted and reinforced with either …
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Efeito do tempo de carregamento e a questão dos recalques de estacas em provas de carga
… foundation pile performance when subjected to vertical load tests. The most usual types of piles are investigated. Load tests are analysed with the purpose of verifying the influence of the loading rate on settlements and on failure loads. It is observed that a more rapid loading - or less …
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Seismic performance of an I-girder to inverted-T bent cap bridge connection
… cyclic testing. The first phase was a horizontal load test phase, which simulated the effects of gravity and seismic loads on the entire test unit. The second phase was a vertical load test phase, which specifically focused on the positive and negative moment capacity of the connection. Both the …
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Design of Bridging Layers in Geosynthetic-Reinforced Column-Supported Embankments
… would otherwise be induced by the new embankment load. The columns in column-supported embankments can be driven piles, vibro-concrete columns, deep-mixing-method columns, stone columns, or any other suitable type of column. A bridging layer consisting of several feet of sand or sand and gravel is …
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Modelling and analysis of a non-pneumatic tire-road interaction using finite element method
… and dynamic tests, including static footprint, vertical stiffness, and drum-cleat analyses. Tire-road interaction characteristics such as tractive effort, rolling resistance coefficient, lateral force, and energy dissipation were evaluated under various operating conditions, including …
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Modelling and prediction of tire-rim slip with finite element analysis
… type, tire-rim friction coefficient, drawbar load, vertical load, inflation pressure, and longitudinal wheel speed. Two terrain types were used: a high-friction hard surface and a soft SPH soil calibrated to represent upland sandy loam. An additional step was the design and training of a …
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Contribuição ao cálculo de recalques de estacas
… a study about the settlement due to an axial and vertical load on a single pile is made. The considerations are restricted to the linear elastic part of the load versus settlement diagram. The main purpose is to evaluate the deformation behaviour of deep foundations, by means of simple methods …
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Design, dynamic modeling, simulation and feedback control of hydrostatic bearing
… motor to drive the carriage as well as to preload the hydrostatic bearings has been developed by Professor Alexander Slocum and Gerald Rothenhöfer of the Massachusetts Institute of Technology's Mechanical Engineering Department. The Hydrocline is made to cope with the increasing requirements …
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Analysis of Pressurized Arch-Shells
… behavior of arch-shells under various types of loading. The types of loading include a uniformly distributed vertical load representing snow, a wind load, and a horizontal side load distributed along the arc length. Deflections, stress resultants, and moments at various locations are computed …
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Dry Stacked Surface Bonded Masonry - Structural Testing and Evaluation
… frame with two hydraulic jacks was used to apply vertical load to the top of the walls. Three conclusions were drawn from the axial testing performed. First, typical ENDURA block walls built without thin set mortar in the bed joints have similar axial capacity to walls built with the thin set …
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Behavior of bolted connections in railroad diamond crossings
… join or cross. The repeated impact and dynamic loads that diamond crossings are subjected to result in alignment problems and more rapid deterioration of the special track work elements compared to open track. This research project aims to perform finite element analysis of a diamond crossing …
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Disproportionate Collapse Resistance of Timber Beam-column Connections
… and ductility necessary to form alternative load paths in the event of such initial damage. Accordingly, these alternative load paths can avert disproportionate spread of the initial damage, i.e. increase robustness. With more and more such sophisticated connections being introduced into the …
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Modeling and Control of the UGV Argo J5 with a Custom-Built Landing Platform
… of the Argo J5 model is the addition of a vertical load on each wheel through derivation of the shear stress depending on the point’s position in 3D space on each wheel. Static leveling of the landing platform within one degree of the horizon is evaluated by implementing Proportional …
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