Shear Wall Design

Anchorage
 
          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.

 

 
          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.
 


Topics of this module include:

IntroductionLoad Path, Segmented Design Method, UBC Design Table, Wall Shear, Dimension Ratios
Chord Design
Deflection, Perforated Design Method, Method Comparison, Shearwall Failures

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