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 “"Lateral forces"”.
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Lateral forces on hydraulic pistons caused by axial leakage flow
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1951.
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A Comparison of Optimized Nonlinear Time History Analysis and the Equivalent Lateral Forces Method for Brace Design
… base shear, and the distribution of equivalent lateral forces. Yielding and drift criteria are then used to determine brace areas. This design procedure is referred to throughout the thesis as the "Equivalent Lateral Force Procedure" (ELF). The thesis compares results from the NTHO and ELF …
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An Investigation and Comparison of Accepted Design Methodologies for the Analysis of Laterally Loaded Foundations
… and pile groups are frequently subjected to high lateral forces. The safety and functionality of many structures depends on the ability of the supporting pile foundation to resist the resulting lateral forces. In the analysis and design of laterally loaded piles, two criterions usually govern. …
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Cyclic Loading Response of Reinforced Concrete Tilt-Up Structures With Plywood Diaphragms
… structures with plywood roof diaphragms to lateral forces is controlled primarily by the behavior of the plywood roof diaphragms. The response is controlled secondarily by the connections between longitudinal and transverse wall panels and the loads for cracking of the longitudinal wall …
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A Hysteresis Model for Reinforced Concrete Space Frame Structures
… plasticity theory. Other relationships between lateral forces and stiffnesses are also included in the formulation. A change of yielding surface size is used to account for axial load variations.
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Water Transport Terminal
… supported by itself, and also helps mitigate the lateral forces of wind and water in which it would stand. The conical form and scale achieved in the proposal would also help create a landmark to the city's growing skyline. It also acts as the point of threshold between land and water, providing …
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Seismic strengthening by providing structural diaphragm
… Because there was little redundancy in the lateral load resisting system, many precast buildings were damaged beyond repair during the 1999 earthquakes in Turkey. In the present study, a rehabilitation scheme is proposed to add a structural diaphragm at the roof level by adding diagonal …
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Methods of evaluating the stability and safety of gravity earth retaining structures founded on rock
… on the backs of retaining walls. These shear forces have a very important stabilizing effect on the walls. Expressed in terms of a vertical shear stress coefficient (Kᵥ - r<sub>xy</sub>/σᵥ), this shear loading was found to range in value from 0.09 to 0.21, depending on the geometrical features …
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Identification of Tire Dynamics Based on Intelligent Tire
… on tire-road contact characteristics e.g., slip, forces and deformation of tires. Vehicle control systems such as ABS and VSP (Vehicle Stability Program) can be enhanced by leveraging this information since control algorithms can be updated based on directly measured parameters from intelligent …
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Development of Prediction Methods for the Lateral Anchorage Requirements in Metal Building Roof Systems
… or Z-section purlins require restraint to resist lateral forces developed within the roof system under gravity loads. The currently available procedures for predicting these forces have been shown to be inaccurate for sloped roofs and difficult to apply to roof configurations with multiple points …
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Investigation of the Behavior of Free-Standing Gabions in Seismic Regions
… countries bordering Kenya. The corresponding lateral forces to these spectral displacements were found, and the restoring eccentricities from the soil restoring force were backed out through a summation of moments. All analysis was experimentally done due to the complexity of properly modeling …
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A robot for gait rehabilitation
… degrees of freedom (DOF) are actuated: vertical, lateral, and frontal translations as well as the rotation about the vertical axis. Vertical forces support part of the patient's weight. Lateral forces assist the weight shift from stance leg to swing leg and are a part of physiotherapy and …
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A contact force sensor for medical jet injection
… the ability to quantify and control contact forces between the injection nozzle and tissue. This sensor uses a three-spoke flexure system with full-bridge strain gauge assemblies mounted on each flexural arm to measure both normal and lateral forces applied to the nozzle. The design, …
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Handling Performance Analysis of Run-Flat and Standard Tires Using Pacejka Tire Model
… tire types were developed in Abaqus to extract lateral force characteristics across slip angles (-4° to +4°) and inflation pressures (250 kPa, 130 kPa, and 0 kPa). The extracted data were fitted using the Pacejka Magic Formula, yielding peak lateral forces of up to 4162 N for inflated run-flat …
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Development of kinematic coupling preload guidelines through design and testing of an adjustable micromanufacturing fixture
… and ±100 [mu]rad in response to 2 N normal and lateral forces during micro-milling operations. The HPF is based upon a kinematic coupling concept, and experiments have been completed that show highly repeatability coupling can be obtained by loading the Hertzian kinematic contacts of the HPF …
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Investigation of alternative seismic design procedures for standard buildings
… simple formulas to determine a distribution of lateral forces for which the structure should be designed. The simple formulas typically involve the use of one or more ""factors"" to account for anticipated inelastic behavior of the structure, relative importance of the structure, and site soil …
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Seismic retrofitting of the Ste-Justine Hospital in Montreal
… and other structures can survive the tremendous forces of earthquakes. While codes and design practices have resulted in greatly improved designs of new buildings, the main danger lies in the nation's inventory of existing vulnerable buildings. This thesis examines the seismic retrofitting …
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Determination of Lateral Resistance of Deck Tie Fasteners in Smooth Top Bridge Girders
… preliminary design aids for the determination of lateral resistance capacity and spacing requirements of deck tie fasteners in curved railroad bridges with smooth top girders. In railroad bridge design, required lateral resistance dictates the spacing of deck tie fasteners. Currently, no …
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Sensitivity Study on Modification of Vertical Distribution of Strength and Stiffness in Wood Shear Wall Building Models
… force distribution method in ASCE 7 that assigns forces to each level based on weight and story height. The Triangular strength distribution (2) results from an assumed vertical force distribution that assigns lateral forces based on the seismic weight at each level. The Constant strength …
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A study to investigate whether speed and road conditionshave an effect on the physiological stability of sick and preterm babies undergoing inter-hospital transfer by ambulance
… and blood oxygen saturation) against speed and g forces experienced in three dimensions, longitudinal direction (x-axis), lateral (y-axis) and vertical direction (z-axis). Data was collected using a DL1 Race–technology device with a 5Hz GPS receiver and digital accelerometer to measure the forces …
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