TIME HISTORY ANALYSIS OF ECCENTRICALLY BRACED FRAMES AND BUCKLING-RESTRAINED BRACED FRAMES: A REVIEW

Abstract

In previous two decades, use of bracing system is in very large amount especially for steel
structures or in retrofitting to resist ground motion. Application of bracing system is mostly seen in western
countries, to resist seismic loads or ground motions. Buckling-Restrained Braced Frames (BRBFs) and
Eccentrically Braced Frames (EBFs) are generally used to provide bracing system. Design EBFs & BRBFs
we need ground motion data or perform earthquake analysis. In previous years seismic analysis is done but
comparison of Time History Analysis for both bracing systems are not done. In simple language time
history analysis is step by step analysis of the dynamical response of structure to a specified loading that
may vary with time and it can linear or non linear. BRBFs are nothing but just a special case of
Concentrically Braced Frames (CBFs) and EBFs are similar to CBFs just difference is at junction of two
braces in CBFs there are no spacing or link between them but in EBFs there is a link of specific length as
per section property. As per opinion of previous researchers, both BRBFs and EBFs are suitable to resist
lateral loadings or in retrofitting. In this paper, previous researches on BRBFs, EBFs and Time history
analysis are thoroughly studied and compiled.