STUDY OF STEEL CONCENTRIC BRACED FRAME STRUCTURES UNDER SEISMIC LOADING FOR VARIOUS SEISMIC ZONES
Keywords:
Steel concentric braced frame, sloping ground, Single bracing, X-bracing, V-bracing, Chevron bracing, seismic behavior, ETABSAbstract
Concentric braced frame is a type of structural system which is used to resist lateral forces (wind or seismic
forces). In the recent few years, world has witnessed many severe seismic events. These events have challenged the bracing
systems of steel structures and standard criteria being used in their design. Past earthquakes in United States and Japan
show the nature and behavior of steel concentric braced frames during the calamity. Studies of moderate to severe
earthquakes give us a good opportunity to study and adequately design these structures. In this study, Single braced, Xbraced, V-braced and Chevron (Inverted V) braced frame structures have been compared with unbraced framed structure for
various seismic zones for seismic behavior case study by using of software package ETABS. The ground is kept sloping at
10o. The study showed that Chevron bracing gives the maximum advantage in terms of reduced bending moment and
reduced deflection for seismic loading as compared to other braced frames considered in the study.
