FRAME LINE QUANTITY EFFECTS ON REDUCTION FACTOR OF OUTRIGGER BRACED STRUCTURES

Current research is carried out on a special type of tall buildings, which is composed of a steelbraced welded structure equipped with outrigger bracings both on roof and mid height levels. Several2D and 3D models, equipped with outrigger bracings of various types are constructed and analyzed,taking into account the site specifications and Sa=0.25g & 0.35g spectral acceleration levels. Byperforming a Modal Push-over Analysis on each model and by using FEMA 356 specifications,Target Displacements, related Base Shear Forces and finally the Reduction Factors for each model dueto soil conditions and spectral accelerations are computed respectively.

کلیدواژه ها:

High-rise Structures ، Nonlinear Analysis ، Outrigger Bracing ، Reduction Factor