Effect of steel bracings on RC building by aligning them at different positions

Abstract

Earthquake is an unexpected and expensive disaster for both livelihood and economy. In the modern day construction there has been a lot of importance to make the structure resistive against the laterally acting loads. Bracings are an option for lateral load resisting system in tall buildings. The concept of bracings is to add more stiffness and strength to the adequate strength of the structure. Members in a braced frame are generally made of structural steel which can work effectively both in strain and pressure. In the present work 13 story irregular building is considered with and without bracings to evaluate the optimum bracing pattern for the structure. By changing the position of the bracings alternately in both horizontal and vertical direction the analysis is carried out. These are the different models analyzed by pushover analysis (a) Building with no bracing, (b) Building with alternate vertical bracing starting from bay-1, (c) Building with alternate vertical bracing starting from bay-2, (d) Building with alternate vertical bracing starting from story-1, (e) Building with alternate vertical bracing starting from story-1. The non linear static results were compared. The various parameters like story drift, shear, time period, stiffness, moment, torsion, performance points are obtained by the analysis for all the models.