Performance of RC Asymmetrical Building With and Without Bracings by Linear Static and Time History Research

Abstract

In asymmetrical Reinforce concrete (RC) buildings, the most effective and practical method of enhancing the seismic resistance and to reduce lateral displacement of the structures by combining bracings elements in the frame. Although past studies have focussed on the modelling of bracing elements, symmetric building models in linear analysis, there have been no detailed investigation on asymmetric structures under seismic excitation. Inclined elements (bracings) react as truss web elements which would bear compression or tension stresses. In present study a G+5 symmetrical RC bare frame, asymmetrical RC bare frame, asymmetrical RC frame incurred with different types of bracings such as X, V, inverted V, eccentric forward, eccentric back bracings at outer positions in all floors. Structural members of G+5 frame are designed as per the provisions of Indian seismic code IS: 1893 (Part-1)-2015. It was observed that maximum reduction both in X direction and Y-direction for x-type bracings in all models. It was observed that the maximum storey drift ratio of the structure under permissible limits as per the Indian seismic code IS: 1893 (Part-1)-2015 from linear static and dynamic analysis. From results obtained from linear static and dynamic analysis, the maximum forces in beams and columns reduced significantly X bracings in symmetric plan and asymmetric plan model