09-10-2014, 02:08 PM
This thesis has been organized in four parts. In part I, the state-of-the-art review of seismic design of steel moment resisting frames for both American and Indian codes are discussed. Deficiencies in the seismic resistant design of steel structures by Indian codes are studied. In Part II of this thesis three two-dimensional moment resisting steel frames are analysed to see the effect of panel zone deformation on the elastic drift. The analysis results show that in all cases the final design is governed by drift criteria rather than strength criteria. In addition to that the stability requirements of different structural elements are also studied and incorporated. An approximate method of estimating panel zone deformation is discussed and the results are verified by writing a linear analysis program including joint panel element. Finally a drift based resizing steps of the moment resisting frames are proposed. In Part III of this thesis two important issues related with stability of steel structures are studied. Itâââ‰â¢s well known fact that due to the pres