Effect of Design Loads in Buckling Restrained Braced Frames Performance

Abstract eng:
The concept of Buckling Restrained Braced Frames is relatively new and recently their use has increased in many countries. However, detailed design provisions for this type of bracing are currently under development. In this paper two approaches for designing of buckling restrained braced frames are considered. In first approach, the provision of Iranian Earthquake code, which used for designing of concentric braced frames, are considered for 4, 6, 8, 10, 12 and 14 stories building with chevron (V and Invert V) and split X configuration of buckling restrained braced frames. In the other approach a new load combination are considered for designing of these bracing types. Static cyclic and nonlinear dynamic analyses were performed for all frames.. The results in the term of story drifts, story shears, story shear versus drift hysteresis behavior and plastic hinges locations were compared. By comparing the response of these two series of frames, a better performance was observed for the new load combination for designing of buckling restrained braced frames.

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