Wind effects on structures

Wind effects on structures

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  WIND EFFECTS ON STRUCTURES NAME: AL-HARAZI AHMED 哈莫
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  What is WindLoad ? The term ‘Wind Load’ is used to refer to any pressures or forces that the wind exerts on a building or structure. There are actually three types of wind forces that would be exerted on a building. 1 ) Uplift Wind Load : Uplift Wind Load is an upwards force of the wind that would affect roof structures or similar horizontal structures in a building, such as canopies or awnings. The wind flow under a roof structure pushes the roof upwards, the wind flow over the horizontal structure pulls the roof upwards. 2) Shear Wind Load : Shear Wind Load is a horizontal pressure or force that can cause walls or vertical structural elements to tilt or crack, causing a building to tilt. 3) Lateral Wind Load : Lateral Wind Load is another horizontal wind pressure that can make a structure move off its foundations or overturn.
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  The actual effectsof these wind forces on houses depend on their design, construction and surroundings. Among other things, high wind pressures tend to collapse garage doors, window units and doors, rip off roofing and roof decking and destroy walls. Roof overhangs, awnings, porches and other features that tend to trap air beneath them, resulting in high uplift forces. In addition, broken windows and doors can expose your home to serious damage from internal wind pressures and water entry. The actual effects of wind forces on farm buildings depend on their design, construction and surroundings. Local windbreaks – trees – can help to reduce these effects.
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  wind movement Influence of windloads on the exploitation of the building
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  Damage Location Uplift candevelop when wind blows across a roof. The location of damage on a home will be affected by the orientation of the wind to the roof structure, and by the shape of the roof. In these areas of uplift are shown in blue. HOW WIND CREATES DAMAGE ?
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  General idea: Wind hastwo aspects : The first one-is that its energy can be utilized to generate power, sail boats and cool down the temperature on a hot day. The other one -is that it loads any and every object that comes in its way. The latter is the aspect an engineer is concerned with, since the load caused has to be sustained by a structure with the specified safety. All civil and industrial structures above ground have thus to be designed to resist wind loads. This introductory note is concerning the aspect of wind engineering dealing with civil engineering structures.
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  Wind flow generationis on account of pressure manifests itself into various forms, such as : 1) Gales 2)Cyclones/Hurricanes/Typhoons 3)Tornados 4)Thunderstorms 5)Localised storms
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  A-Cyclones storms
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  B-Thunderstorms C-tornadoes
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  Typical wind andstorm damage  Wind storm disaster cause widespread damage due to high wind speed , and flooding in case of cyclones
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  THANK YOU