Progressive Collapse Analysis of Multi Storey Steel Structure with Bracing Systems using E Tabs

Progressive collapse refers to the phenomenon in which the local damage of a primary structural element leads to total or partial structural system failure, without any proportionality between the initial and final damage. Even if the probability of structural collapse is low, if it occurs, it can cause significant losses. In the past few decades, many incidents of the total or partial collapse of structures due to fire, explosions or impacts have occurred. In the present study, Multi storey structure is considered. The modelling and analysis are carried out using E tabs software. The different bracing systems are used to analysis the structural behavior. The Structure is later verified for progressive collapse analysis at 3 different locations such as corner, Centre and middle of the structure. The progressive analysis is carried out and results are extracted and discussed. The displacement control can be easily achieved by providing bracings. The displacement of bare frame models can be reduced by 55 , 55 and 63 by adopting bracings such as Diagonal bracing, V Bracing and X Bracing systems. The progressive collapse analysis shows the failure of upper level beams. It is estimated that, the maximum increase in percentage of DCR value for beams are around 38 , 52 and 59 for location A, B and C respectively. And hence the beams are super designed for these additional capacities to avoid progressive collapse. From the overall results, it is concluded that, the bracings are very much necessary for the reductions of displacement and drift effect in a building. However, its Importance is not of much use in case of progressive collapse state. The X Bracings are preferred for bracing system. Rekha M N | Dr. S Vijaya | Dr. B Shivakumara Swamy "Progressive Collapse Analysis of Multi Storey Steel Structure with Bracing Systems using E-Tabs" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33544.pdf Paper Url: https://www.ijtsrd.com/engineering/structural-engineering/33544/progressive-collapse-analysis-of-multi-storey-steel-structure-with-bracing-systems-using-etabs/rekha-m-n