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 60 for “"wind loads"”.
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Wind loads for petrochemical structures
… available to practicing engineers for estimating wind loads for petrochemical structures have little theoretical or experimental basis. This dissertation research is an effort to expand the understanding of wind effects on petrochemical and other, similar structures. Petrochemical structures …
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Vibration of Buildings Under Random Wind Loads
Wind and earthquakes are two of the major environmental forces acting on multistory buildings. Since current design practice often leads to slender and flexible buildings, the dynamic effects of the wind are of increasing importance. The purpose of this study was to develop a method for analyzing …
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Design of Stick-Framed Wood Roofs Under Extreme Wind Loads
… on past practice and limited consideration of wind loads. This makesthese roof structures susceptible to failure in high-speed wind events, such as tornadoes. Around 90% of all tornadoes in Canada fall in or below the EF-2 category,making it a possible target for design of wood-frame houses to …
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Wavelet Analysis of Extreme Wind Loads on Low-Rise Structures
… been conducted with the objective of reducing wind damage to structures. Wind tunnel simulations of wind loads have been the major source of building codes. However, a simple comparison of pressure coefficients measured in wind tunnel simulations with full-scale measurements show that the …
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Experimental and computational determination of wind loads on netted/sheeted scaffolds.
This thesis describes an investigation into the wind loading on access scaffolds erected around a cubical building, clad by impermeable sheeting or permeable debris netting. The subject was investigated experimentally by tests in a wind-tunnel and theoretically using computational fluid dynamics …
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Sensitivity of Steel Purlins to Changes in Application of Wind Loads
This project studied the effects of wind tunnel test loads applied to purlins in low rise steel buildings compared to those determined with currently recognized wind loading provisions. The National Institute of Standards and Technology (NIST) database of low-rise building wind tunnel test data, …
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Stress and buckling analysis of grain silos under snow or wind loads
… roof is studied under the action of snow or wind load. First the silo is analyzed by the current simplified conventional method. Simplifications include ignoring the presence of the shell skin, the ring and intermediate ring, the cross braces and the eccentricities and transverse shear …
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Development and Validation of an Aeroelastic Ground Wind Loads Analysis Tool for Launch Vehicles
… and dynamic launch vehicle responses to ground wind loads (GWL). The motivation of this study was to estimate the magnitude of response of the Ares I-X launch vehicle to ground winds and wind-induced oscillation (WIO) during roll-out and on the pad. This method can be extended to other launch …
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Finite Element Analysis of a Pair of Leaning Pressurized Arch-Shells Under Snow and Wind Loads
… various tilt angles, boundary conditions, and loads is investigated numerically. Several types of loads are considered, including uniformly-distributed vertical loads applied over all or half of the structure (representing snow), and wind loads on the structure. The arches are pinned or fixed …
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Comparison of three widely-used aerodynamic modifications that minimize the impact of wind loads on tall buildings
For tall buildings, motion caused by wind is usually the most damaging to the lateral support system. As a result, engineers have invented many different methods to limit the motion of the buildings, for example dampers, bracings and outriggers etc. Aerodynamic modification, which is a passive …
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Use of the Discrete Vortex Method to Calculate Wind Loads over a Surface-Mounted Prism and a Bridge Cross-Section with Flaps
… tool to determine the flow field and associated wind loads over structures. Two structures are considered: the first is a surface-mounted prism and is used to simulate wind loads over low-rise structures. The second is a bridge section with attached flaps that can be oriented to vary the moment …
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Rational Procedure for Damage Based Serviceability Design of Steel Buildings Under Wind Loads and a Simple Linear Response History Procedure for Building Codes
… two topics: the development of a procedure for wind serviceability design of steel buildings and the development of a simple linear response history analysis for building codes. In the United States the building codes are generally silent on the issue of serviceability. This has led to a wide …
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Performance based wind design and optimization of tall buildings considering the nonlinearity in building response
… tall buildings and other structures excited by wind loads has received much attention over the past few decades. The main objective of Performance Based Wind Design (PBWD) is to assess the adequacy of a structure in terms of the decision variables set forth by the stake holders. The performance …
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Effects of a tuned mass damper on wind-induced motions in tall buildings
… it has also created new problems to face, namely wind-induced motions. In particular, wind loadings are now the source of vibrations in buildings, which have a direct impact on users. While in the past, strength capacities were the main concern, nowadays, human's comfort has become the one of the …
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Wind tunnel investigation of wind load on a ground mounted photovoltaic tracker
Wind loading is an important environmental factor to be considered in design of components and support structures of ground mounted photovoltaic tracker systems (PVT). Current understanding of action of wind on such systems is incomplete. Over the past decade, a number of investigations devoted to …
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An analysis procedure for cylindrical and spherical shells subjected to multi-harmonic loads
… subjected to complicated multi-harmonic surface loads is a very complex problem. Although several techniques exist for the solution of complex shell problems, all of these techniques present certain difficulties which make them impractical for use with complex surface loads. In an attempt to …
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A Case Study on Medium and High Rise Timber Buildings
… is numerically modeled and exposed to real wind loads obtained from the Boundary layer wind tunnel laboratory (BLWTL). The moment connection shared characteristics based on tests conducted in the literature on a small moment connection. The wind loads are extracted from a previously tested …
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Analysis of surface pressure and velocity fluctuations in the flow over surface-mounted prisms
… value of the Reynolds number associated with wind loads on structures is of the order of 10^7. This is further complicated by the high levels of turbulence fluctuations associated with strong winds. On the other hand, numerical and wind tunnel simulations are usually carried out at smaller …
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Analysis, Simulation and Control of Peak Pressure Loads on Low-Rise Structures
Wind storms pose dangerous threats to human lives and are an enormous drain on the economy. Their damage to buildings usually starts with the failure of structural components that are subjected to excessive wind loads. In this dissertation, we investigate the characteristics of extreme loads on …
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Behavior of Wind Turbine Towers and Blades Under Tornado Wind Fields
The installation rate of wind turbines around the world is increasing significantly. Therefore, wind turbine farms are constructed in plentiful wind resources areas that put a considerable number of wind turbine towers under severe wind conditions. As a result, failures due to unexpected wind loads …
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