ANALYSIS OF FLOATING COLUMN BUILDING OF COMPOSITE AND R.C.C BEAM GIRDER & COMPARISON WITH R.C.C FRAME STRUCTURE BY USING ETABS V9.7.0

Jayashri Sarode 1 and Mr. Amol.S. Pote 2 . 1. M.E. II, Department of Civil Engineering, GHRCEM, Pune University, India. 2. Asst.Prof. Department of Civil Engineering, GHRCEM, Pune University, India. ...................................................................................................................... Manuscript Info Abstract ......................... ........................................................................ Manuscript History

Steel-concrete composite beams are extensively used in construction of buildings and bridge. Composite beam under applied loads are often subject to combine action of bending and vertical shear. In order to design composite beam consistently, it is necessary to develop new models for analysis of displacement, storey shear and storey drift. The floating column is a vertical element which is rest on beam, these columns are without foundation. The floating column rests on beam which is a R.C.C Beam Girder. The girder is in the form of beam and the column load acts as a point load on that transfer beam. In this seminar report the composite beam is used in Floating column structure. The composite beam is subjected to floating column; because of this we utilize the strength of composite beam. Three Models are compare in this seminar they are Normal structure, Floating column structure with R.C.C Beam Girder, Floating column structure with composite beam girder. The analyses of structure are carried out with the help of Etabs.

…………………………………………………………………………………………………….... Introduction: -
Reinforced concrete building can adequately resist both horizontal and vertical load. Whenever there is requirement for a multistorey building to resist higher value of seismic forces, lateral load resisting system such as shear wall should be introduced in a building. In R.C.C framed structure, the no of column is present in ground floor. For parking purpose this column is an obstacle. To reduce this obstacles, the floating column concept is used. Column is float at ground level. It provides good architectural view for that building and also increase the open space for parking purpose, assembly hall etc. In this paper the research is related to R.C.C beam girder subjected to floating column and Composite beam girder subjected to floating column. This both model is comprising with the Normal R.C.C framed structure. In many research paper the floating column with R.C.C beam girder is analyzed.
In this report the composite beam is used in Floating column structure. The composite beam is subjected to floating column; because of this we utilize the strength of composite beam. Three Models are compare in this seminar they are Normal structure, Floating column structure with R.C.C Beam Girder, Floating column structure with composite beam girder. The analyses of structure are carried out with the help of Etabs.
1. The objective of present work is to study comparison of normal column structure with floating column composite beam girder structure. 2. By using this R.C.C Beam Girder more open space is available on the ground floor. These open spaces may be required for assembly hall or parking purpose. 3. Concrete is stronger in compression than in tension, and steel is susceptible to buckling in compression. By the composite action between the two, we can utilize their respective advantages to the fullest extent.

Literature review: -
The current literature survey includes composite beam analysis and earthquake response of frame structure and floating column structure. These survey emphasized on strengthening the structure in seismic region.

Formulation of Problem: -
A 18.27mt x 28.14mt, 10 storey regular structure is considered for the study. Modeling, analysis, estimation and design of the structure is done separately on Etabs software. The three models are design in this paper first Normal structure, Second Floating column structure with R.C.C beam girder, Third Floating column structure with composite beam girder.

Result and Discussion: -
Analysis of models carried out with the horizontal component of earthquake load as per equivalent static load method and response spectrum method of IS 1893:2002(part-1). The results are presented with respect to parameters considered in present study such as base shear, displacement. Response Structure analysis was performed on Normal structure, Floating column structure with R.C.C beam girder, Floating column structure with composite beam girder using Etabs. The storey shear forces, storey drift and displacement were calculated for each floor and graph was plotted for each structure.  For Max Storey Shear -Considering the Equivalent Static method, the maximum storey shear is more than Response Spectrum method. It is found that the storey shear is maximum in Equivalent Static method in X direction for model 2 which is floating column building with R.C.C beam girder For Max Storey Drift -Considering the Response spectrum method, the maximum storey drift is more Equivalent Static method. It is found that the storey shear is maximum in Response Spectrum method in Y direction for model 1 which is floating column building with composite beam girder.
For Max Displacement -The displacement is max in model 1 in Y direction, so the model 1 is flexible than another model.