A REVIEW ON 3D MOMENT RESISTING STEEL FRAME WITH AND WITHOUT BRACING SUBJECTED TO LATERAL LOAD (SEISMIC LOAD)

The idea of utilizing steel supporting is one of the beneficial ideas which can be used to strengthen or retrofit the current structures. In this present study, the seismic performance of steel frame building structure rehabilitated using concentric and eccentric bracing is investigated. The different kinds of bracing like X-bracing, V- bracing, Inverted v-bracing, Diagonal1 bracing, Diagonal 2 bracing, k-bracing and Inverted k- bracing are provided for exterior part of buildings. A G+16 steel frame building is analyzed for seismic zone5 and hard soil as of IS-1893:2002 by equivalent static method and response spectrum method using E-tabs. The effect of distribution of steel bracing along the height of the structure on seismic performance of rehabilitation is studied. The execution of the steel frame building is evaluated in terms of lateral displacements, storey drifts, base shear and time period. It is noticed that X bracing give more stiffness when compared to different types of bracing. The steel frame building with X bracing systems will have minimum possible lateral displacements in comparison to other types of bracing systems. By providing X bracing on exterior part of building the displacement of building is reduced up to 20.59% and 77.52% in longitudinal and transverse direction by equivalent static method. By providing X bracing on exterior part of building the displacement is reduced up to 17.73% and 73.24% in longitudinal and transverse direction by response spectrum method.