Typical load bearing wall units include solid wall panels and window wall and spandrel panels.
Concrete shear wall section detail.
Joist beam connections.
The detailing required in order for the diaphragms and shear walls to maintain their rigidity and shape so that proper connections are maintained.
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The changes are a result of the unsatisfactory performance of many shear walls in the chile earthquake of 2010 and the christchurch new zealand earthquake of 2011.
Band joist support beam.
Footings foundation walls.
The effectiveness of precast concrete shear walls is largely dependent on the panel to panel connections.
Strength reduced from 136 7 to 116 8 in kips.
Band joist bottom plate shear.
Bending strengthof the section has been reduced by about 15 shear strengthat wall base has been reduced by about 14.
The effectiveness of precast shear walls is largely dependent upon the panel to panel connections.
Longer shear segments are more effective and are recommended where possible or required by design.
Shear strength reduced from 7654 lbs to 6589 lbs.
3 clear rather than the designed 2 clear.
The design and detailing requirements for special reinforced concrete shear walls have undergone significant changes from aci 318 11 to aci 318 14.
A reinforcement ratio is defined as the ratio of the gross concrete area for a section taken orthogonal to the reinforcement.
Each of the exterior walls on all four sides of the building and all interior walls designed as shear walls must have at least one 2 ft 610 mm minimum section of wall identified as a shear segment to resist the high lateral loads.
Precast concrete shear wall panels provide a lateral load resisting system when combined with the diaphragm action of the floor construction.
In some cases precast panels are used as formwork for cast in place concrete.
Wall section details.
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Concrete shear walls are reinforced with both horizontal and vertical reinforcement figure 4.
3500 psi concrete 5 10.
Vertical shear walls and shear wall components.
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