Effect of Concentric Braces on the Behaviour of Steel Structure by Pushover Analysis

Abstract

Today is the era of economy with the safety of the occupants/user. The past experiences of the earthquakes and the devastations restrict the designer towards the safety, rather than to achieve the economy in the construction. This has led the designers to move towards the performance based design of the structure and the pushover analysis is the part of that. Nonlinear static analysis, or pushover analysis, has been developed over the past twenty years and has become the preferred analysis procedure for design and seismic performance evaluation purposes, as the procedure is relatively simple and considers post elastic behavior. Beside all this, it has been observed that the bracings, if provided, in the structure, increase the capacity of the structure. There are various types of bracing being used wide over. Hence, in this paper, the effect of various types of concentric braces on the behavior of the structure is tried to be evaluated by using pushover analysis which can be used with due achievement of the economy taking care of safety.