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Title

EVALUATION OF TALL STEEL STRUCTURES WITH DUAL SYSTEM (SMRF&RC SHEAR WALL) IN NEAR-FIELD GROUND MOTIONS BY PERFORMANCE BASED DESIGN METHOD

Pages

 Start Page 85 | End Page 94

Abstract

 This paper discusses performance of tall steel structures with DUAL SYSTEM (comprised of SMRFs and Intermediate RC shear walls) in near-fault ground motions according to acceptance criteria introduced in FEMA356 and ATC40. Achieving this purpose and in comparison with far-fault ground motions and evaluating acceptability of push-over analyses in PERFORMANCE BASED DESIGN method some nonlinear time history analyses under near-field and far-field records and some nonlinear static analyses are performed. Thereafter acceptance criteria of structures is checked. The results show that despite of appropriate performance of DUAL SYSTEM under far-fault excitations structural performance is not acceptable under near-fault ground motions because of inadmissible story drifts. Deficiency of Iranian code (Standard No.2800) in exhibition of critical load combination for column’s seismic design and inadequacy of push-over analysis in demonstrating tall buildings performance are other results of this study.

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