shear wall ppt

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Presented By

Brij Mohan Sharma

ROLL NO:11 B1 Civil

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SHEAR WALL

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Shear wall, In building construction, a rigid vertical diaphragm capable of transferring lateral forces from exterior walls, floors, and roofs to the ground foundation in a direction parallel to their planes. Examples are the reinforced-concrete wall or vertical truss. Lateral forces caused by wind, earthquake, and uneven settlement loads, in addition to the weight of structure and occupants, create powerful twisting (torsional) forces. These forces can literally tear (shear) a building apart. Reinforcing a frame by attaching or placing a rigid wall inside it maintains the shape of the frame and prevents rotation at the joints. Shear walls are especially important in high-rise buildings subject to lateral wind and seismic forces.

INTRODUCTION 1

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PICTORIAL VIEW

Shear Wall

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PLACEMENT OF SHEAR WALLS

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Shear walls behaviour depends upon : material used, wall thickness, wall length, wall positioning in

building frame also.

Shear Wall

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Shear walls are especially important in high-rise buildings.

In residential buildings, shear walls are external form a box which provides all of the lateral support for the building.

Resist : Lateral loads , Seismic loads , Vertical Forces(gravity)

Rigid vertical diaphragm transfers the loads into Foundations

SHEAR WALL 5

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Thinner walls. Light weight. Fast construction time. Fast performance Enough well distributed reinforcements. Cost effectiveness Minimized damages to structural and Non structural elements.

ADVANTAGES 6

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Shear walls are not only designed to resist gravity / vertical loads but designed for lateral loads of earthquakes / wind.

walls are structurally integrated with roofs / floors (diaphragms)

Walls have to resist the uplift forces caused by the pull of the wind.

Walls have to resist the shear forces that try to push the walls over.

APPLICATION 7

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(a)The thickness of the shear wall should not be less than 150mm to avoid unusually thin sections.

(b) The minimum reinforcement in the longitudinal and transverse directions in the plan of the wall should be taken as 0.0025 times the gross area in each direction.

Uniform distribution This helps in controlling the width of inclined cracks that are

caused due to shear. (c)if the wall thickness exceeds 200mm, the reinforcement

should be provide in two layers.

DESIGN 8

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Each bars running in both the longitudinal and transverse directions in the plane of the wall.

The use of reinforcement in two layers reduces fragmentation and premature deterioration of the concrete under cyclic loading.

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