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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 63 for “"design equations"”.
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Development Of Design Equations For A Square-tube Subbase Supporting A Shaft-mounted Speed Reducer
… reducers, Rexnord Corp. is implementing subbase designs that are lighter weight and easier to manufacture than current designs. Impeding the implementation of lower cost designs is the lack of an equation to properly choose subbase dimensions for acceptable values of shaft misalignment. Trial and …
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Reliability analysis of single-headed anchor bolts
Several design equations for predicting the capacity of a single-headed anchor bolt embedded in plain concrete have been recommended in the United States. The capacities computed by these different recommendations, in some cases, differ significantly. The existing differences in current design …
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Horizontal Shear Transfer Between Ultra High Performance Concrete And Lightweight Concrete
… concrete, has begun to revolutionize the bridge design industry. This extremely high strength material has given smaller composite sections the ability to carry larger loads. As the forces being transferred through composite members are increasing in magnitude, it is vital that the equations …
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Limit State Design of oil and gas well casings
… oil and gas industry. Traditionally casings were designed using working stress design, which had a number of shortcomings such as poor economics, inflexibility and uneven risk. This thesis was initiated by the increasing demand for an improved design of casings for the oil and gas industry. A new …
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Interface Shear Strength in Lightweight Concrete Bridge Girders
… 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 provides design equations for horizontal shear strength of both lightweight and normal weight concrete. Thirty-six …
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Lateral Restraint Brace Forces in Quarter Point and Third Point Plus Support Braced Z-Purlin Supported Roof Systems Subject to Gravity Load
The objective of this study was to develop design equations that predict lateral restraint forces in two commonly used Z-purlin supported roof systems. These are quarter point bracing and third point plus support bracing. To that end, a stiffness model used in the past has been reintroduced. This …
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Sensitivity Analysis Of Aashto's 2002 Flexible And Rigid Pavement Design Methods
Over the years pavement design has been based on empirical equations developed from the American Association of State Highway Transportation Officials (AASHTO) road tests. The various editions of the AASHTO pavement design guide have served well for several decades; nevertheless many serious …
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The use of numerical groundwater model to improve effectiveness of subsurface drainage system in irrigated field
… as the SEAWAT model can be effectively used for design of subsurface<br/>drainage systems for controlling salt concentration in the root zone on salt affected<br/>irrigated land. The SEAWAT model was used to optimize subsurface drainage design to<br/>ensure that the salt concentration of the …
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Mathematical Formulations in Conceptual Design, Analysis, and Optimization
Engineering design problems are often multidisciplinary in nature, giving them a natural decomposition into subproblems. The field of multidisciplinary design, analysis, and optimization (MDAO) has developed methods to integrate these sub-problems and generate standardized mathematical …
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A Modified AISC P -M Interaction Curve for Square Concrete Filled Tube Beam -Columns
… for CFT beam-columns based on the current AISC design method provides too conservative results. The over-conservative estimation of the current AISC method is mainly due to the different behavior of the pure steel columns and the composite columns. Considering the contribution of the concrete, a …
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Design and analysis of an active power factor correction circuit
The design of an active-unity power factor correction circuit with variable-hysteresis control for off-line dc-to-dc switching power supplies is described. Design equations relating the boost inductor current ripple to the circuit components selection and circuit performance arc discussed. A …
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Magamp post-regulator applied to a quasi-resonant converter and magamp operation under extreme load condition in a PWM converter
… under extreme loading conditions. Practical design equations are derived to allow magamp operation under extreme load conditions such as shutdown of output, foldback of output current and very light load (discontinuous operation). The other issue considered concerns with magamp post …
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The Viability of Steel-Concrete Composite Girder Bridges with Continuous Profiled Steel Deck
… various provisions of the AASHTO LRFD Bridge Design Specifications (2007) cannot be satisfied, including shear stud fatigue spacing requirements and the fully composite section requirements. The purpose of this research was to investigate whether continuous permanent metal deck form …
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Wood deck bridges-stress laminated wood panels on steel beams
… to be a reliable alternative in rural bridge design applications. Pure aesthetics responsive to timber construction add to the allure of this optional approach. Incorporation of steel stringers offers adequate stiffness contributions, while serving to lower overall project costs and nominal …
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Bending behavior of concrete T-beams reinforced with glass fiber-reinforced polymer (GFRP) bars
… on the test results and theoretical evaluations, design equations to predict bending behavior, deflection, effective flange width and crack-widths are developed.
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Design analysis of single-span advanced composite deck-and-stringer bridge systems
… the composites has created a need for simplified design analysis procedures that account for both the geometry and material properties of ACM members and systems.;An analytical/experimental study of fiber-reinforced plastic (FRP) composite bridges consisting of cellular box decks and wide-flange …
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Effects of Inlet Design on Hydraulic Efficiency and Sediment Cleanout of Bridge Deck Drains
… of inlets, which can be affected by grate design, downspout configuration, and debris accumulation. Inadequate drainage can result in hydroplaning, which can diminish highway safety. To evaluate the controls on drainage inlet efficiency and compare currently deployed inlet design …
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Studies on the dynamics of equation-based chemical process flowsheeting systems
… of large sets of Differential and Algebraic equations (DAEs). The very flexible and effective equation-based (EB) approach in dynamic process flowsheeting calls for the simultaneous solution of the DAE set. However the numerical solution of DAEs is not trivial. The convergence properties of …
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Web crippling of hot-rolled beams at stiffened-seat connections
The current end web crippling design equations are based on a collapse mechanism developed for interior web crippling of short-span plate girders. Yield-line theory and the mechanism solution were used to derive an expression for the web crippling capacity of a plate girder subjected to an interior …
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Development of a Novel Cold-Formed Steel Truss System
… termite and rot resistant, flexible in design, and ease of handling and fabrication. Often CFS trusses are designed and assembled at a plant and then transported to the site, which reduces overall construction times. This research describes the development of a novel cold-formed steel …
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