Analysis of RC multistorey building with steel bracings
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Date
2021-02
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Buildings are physical structures which provide shelter and safety for people. People prefer to live in their own individual spaces, so there is a requirement for many tall buildings to be constructed. Tall buildings have their own drawbacks such as lower resistance to wind and earthquake. Thus these buildings, if constructed in high seismic areas, may be susceptible to the severe damage which further leads to loss of life. Along with gravity load, structure has to withstand the lateral loads subjected to the building due to earthquake thus different lateral load resisting techniques are used now-a-days to make a tall structure stiff and stable. The present study focuses on the study of RC framed structure provided with three different type of bracing systems. For this study, a G+14 storied RC frame structure has been considered and the structural behavior has been studied for the seismic zones IV. The RC framed models are analyzed by Response spectrum Method using a computer aided software i.e., STAAD.Pro V8i. The structural
behavior has been studied by using different types of bracing system such as X-bracing, Inverted-V bracing and V-bracing provided on the exterior faces of the buildings and at different locations on all the four sides. Comparative study of the braced and unbraced
models is conducted for the parameters i.e. time period, base shear, storey drift, storey displacement, bending moment and peak storey shear. It has been observed that the storey displacement, storey drift, bending moment and time period of the braced frame
decrease when compared to the un-braced frame and the base shear value of the braced models increases. Peak storey shear values are more for the braced frames. It is concluded that the model with the X-bracing provided at the mid-bays on the exterior
faces of the buildings significantly contribute to structure stiffness as compared to the other bracing system.