![]() ![]() Vertical bracing between structural columns transfers lateral forces to ground level. Resistance is provided by vertical bracing or horizontal bracing. They use diagonal and/or triangulated steel beams or cables to resist lateral forces. The symmetrical location of shear walls in buildings is desirable.īraced frames are common in steel construction. In this case, the shear wall acts as an individual wall section, and the slabs above and below the openings act as a tie beam that distributes the load. Other shear wall shapes include a rectangle, L-shape, and C-shape.Ī shear wall with openings is referred to as coupled shear walls. The latter is referred to as a shear core. Common positioning includes the building’s perimeter or the center of a building encasing an elevator shaft or stairwell. The strength and stiffness of a building depend on the shape and position of the shear wall. Many homes have shear walls on the exterior perimeter. Shear walls are important in medium- to high-rise buildings, or any building located in high wind or seismic activity areas. Shear walls are typically constructed of concrete, masonry, cold-formed steel, or wood framing. They also perform well in areas with seismic activity. Shear walls typically span from the foundation to the top of a building. It essentially acts as a vertically spanning beam to resist lateral forces. Shear walls resist this movement, and the forces are transmitted back down to the diaphragm below or to the foundation. Shear WallsĪ shear wall is a structural member that resists cracking through in-plane shear, such that ground movement enters the building and creates inertial forces that move the floor diaphragms. Additionally, they must be expected to withstand inelastic deformations and sustain a specific inter-story drift angle. Moment frames that are used in zones with seismic activity must have pre-qualified connections per the American Institute of Steel Construction (AISC), or, in some cases, be verified through testing.
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