| Anchorage |
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Anchorage refers to the connectors that attach the structure to the
foundation to resist the applied lateral loads. Anchorage forces
refer to the transfer of vertical (gravity and uplift) loads, lateral forces
perpendicular to the wall, and lateral forces parallel to the wall.
There are two basic type of anchors. The first type are called hold-downs (tie-downs) and are the connectors used at the ends of shear wall segments to resist overturning moments. Hold-downs must transmit the tensile force from a shear wall chord to the foundation of the structure. The second type are called anchor bolts (sill plate bolts). These bolts are evenly spaced along the bottom length of the shear wall and primarily resist sliding action from lateral loads. |
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Anchorage is a connection design problem. The
forces are straightforward to calculate as they are simply the uplift forces
required at the chords of the shear wall to prevent overturning, and the unit shear along the base of the
shear wall to prevent sliding. Information regarding connection design is presented in
the Connections Tutorial. |
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Topics of this module include:
Introduction,
Load
Path, Segmented
Design Method, UBC
Design Table, Wall
Shear,
Dimension Ratios, |
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