بررسي ضوابط طراحي سازه هاي فولادي بلند با سيستم دوگانه قاب- ديوار در حوزه نزديك به گسل به روش طراحي بر اساس عملكرد

Evaluation of Tall Steel Structures with Dual System (SMRF&RC Shear Wall) in Near-Field Ground Motions by Performance Based Design Method

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 columnʹs seismic design and inadequacy of push-over analysis in demonstrating tall buildings performance are other results of this study. KEYWORDS Dual Systerih Near Field< Performance Based Design, Nonlinear Analyses