The discusser briefly reviews literature to support his expression of surprise that the authors of this paper did not consider whether or not angular distortion (net slope) was a suitable index of damage in their analysis of 95 buildings. In the case of framed structures supported by isolated footings, damage is associated not only with foundation displacements but also with location of the footings. Thus "tiliting" will cause no strains in the framing only if the footings are free to rotate. The discusser is unaware that footing rotation has been considered previously in assessing tolerable settlements, or that measurements of footing rotations in buildings have ever been made. If any credence can be placed in the usual practice for designing framed structures, which assumes fixity of the foundations, then the removal settlement due to tilt in the manner suggested by the authors is not justified.

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  • Accession Number: 00099105
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11398 Proceeding
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM