by J.C. De la Llera and A.K. Chopra
De la Llera, J.C., and A.K. Chopra (1992). Evaluation of Code-Accidental Torsion Provisions Using Earthquake Records From Three Nominally Symmetric-Plan Buildings. SMIP92
Seminar on Seismological and Engineering Implications of Recent Strong-Motion Data, p. 4-1 - 4-16.
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A procedure is presented for evaluating building code provisions for accidental torsion from
analysis of recorded motions of nominally symmetric-plan buildings during earthquakes. This
procedure is utilized to analyze the motions of three buildings recorded during recent
California earthquakes. The results demonstrate that the accidental torsion specified by the
Uniform Building Code is adequate in representing the torsion in the recorded motions of these
three buildings. It is also concluded, although somewhat speculatively, that accidental torsion
need not be considered in the
design of many buildings.