International Journal of Engineering Research

Nikhil D. Sontakke ¹, P. S. Lande ¹

Affiliations
1 Department of Applied Mechanics, Government College of Engineering Amravati, Maharashtra, IN

Abstract

Earthquake forces on the structures are great concern for the engineers. To minimize the effects of Earthquake and lateral forces on the structure, bracing system is one of the systems which play an effective role in resisting the lateral forces in buildings. New type of bracing system, called Buckling Restrained bracing system, has many advantages over conventional bracing, hence can be employed in the structure. In present study, comparative analysis between conventional bracing systems and buckling restrained bracing system is done. For comparison, ten story concrete reinforced building which is located in seismic zone IV and soil type is II as specified in IS 1893-2002 is analyzed using a commercial software ETABS v 2015. Inverted V braces are used for both the buildings. For the analysis,Response Spectrum analysis is done and the various parameters such as story drift, story forces and story displacements have been evaluated and compared. It is concluded from this study that buckling restrained bracing can reduce the effect of lateral forces on a building compared to conventional bracing.

Keywords

Buckling Restrained Braces, Response Spectrum Analysis, ETABS v 2015, Story Drifts, Conventional Bracing.

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Vishwajeet Patel ¹, P. S. Lande ¹

Affiliations
1 Department of Applied Mechanics, Government College of Engineering Amravati, Maharashtra, IN

Abstract

Steel-concrete composite columns are used extensively in high rise building and bridges, as a type of hybrid system. However this approach is a relatively new concept for construction industry. In concrete-filled steel tube (CFST) columns, the steel tube provides form work for the concrete, the concrete prevents local buckling of the steel tube wall. The load carrying capacity and behavior in compression,bending and shear are all superior to reinforced concrete. An analytical investigation of behavior of Concrete Filled Steel Tubes column and a theoretical design procedure according to EN 1994-1-1 Euro Code-4 are presented. The investigation has been carried out for rectangular and circular CFST columns under axial compression. The analytical model is developed to predict the capacity of CFST accounting for interaction between steel and concrete. The results obtained by theoretical calculation is validated using ANSYS 11.0 Multi physics utility tool. The results are illustrated by load carrying capacity table and modes of failure.

Keywords

Concrete Filled Steel Tube, ANSYS, Finite Element Analysis, Euro Code 4, Contact Element, Composite Column etc.

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