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Evaluation of Code Accidental Torsional Provisions Using Strong Motion Records From Regular Buildings

by J. De la LLera and A. Chopra

De la LLera, J., and A. Chopra (1991). Evaluation of Code Accidental Torsional Provisions Using Strong Motion Records From Regular Buildings. SMIP91 Seminar on Seismological and Engineering Implications of Recent Strong-Motion Data, p. 7-1 - 7-13.

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Abstract

A procedure was developed for evaluating building code provisions for accidental torsion from analysis of recorded motions of nominally symmetric-plan buildings during earthquakes. This procedure was applied to the motions of a three story office building in Richmond (CSMIP station no 58506), California recorded during the Loma Prieta earthquake. The results for this particular earthquake show that the prescribed code accidental eccentricity value of 0.05b predicts reasonably well the torsional effects experienced by the structure.