International Journal of Advance Engineering and Research Development A REVIEW ON SEISMIC ANALYSIS OF MULTISTOREY BUILDING WITH FLOATING COLUMN

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1 Scientific Journal of Impact Factor (SJIF): 5.71 International Journal of Advance Engineering and Research Development Volume 5, Issue 4, April -218 e-issn (O): p-issn (P): A REVIEW ON SEISMIC ANALYSIS OF MULTISTOREY BUILDING WITH FLOATING COLUMN Karishma I.patel 1, Hitesh K. Dhameliya 2, Krutarth S. patel 3 1 M.Tech. Structural Engineering student, CGPIT, Bardoli, Gujarat, India 2 Assistant Professor, CGPIT, Bardoli, Gujarat, India 3 Assistant Professor, CGPIT, Bardoli, Gujarat, India Abstract - Now a day s lots of multistory buildings are constructed with floating column for purpose of getting more space at parking areas for movement. But same case highly damaged during highly seismic zone as compared to normal building in earthquake. And this paper also studies the seismic behavior of multistory building with and without floating column considered. To find whether the structure is safe or unsafe with floating column when built in seismically active areas..in this present work different provision of floating column and shear wall are using analysis the building G+3 and G+8. And compered value of X, Y, Z direction and give result and conclusions. Keywords- s, seismic Behavior, Lateral, Story Drift, Shear wall, Base shear. I. INTRODUCTION In recent times, multi-story buildings in urban cities are required to have column free space due to shortage of space, population and also for aesthetic and functional requirements. For this buildings are provided with floating columns at one or more story. These floating columns are highly disadvantageous in a building built in seismically active areas. The earthquake forces that are developed at different floor levels in a building need to be carried down along the to the ground by the shortest path. Deviation or discontinuity in this load transfer path results in poor performance of the building. The earthquake forces developed at different floor levels in a building need to be brought down along the to the ground by the shortest path; any deviation or discontinuity in this load transfer path results in poor performance of the building. Buildings with vertical setbacks (like the hotel buildings with a few story s wider than the rest) cause a sudden jump in earthquake forces at the level of discontinuity. Buildings that have fewer columns or walls in a particular story or with unusually tall story tend to damage or collapse which is initiated in that story. Many buildings with an open ground story intended for parking collapsed or were severely damaged in Gujarat during the 21 Bhuj earthquake. Buildings with columns that hang or float on beams at an intermediate story and do not go all the way to the foundation, have discontinuities in the load transfer path. [1] Column is supposed to be a vertical member starting level to foundation level and transferring the load to the ground. And floating column is also a vertical element which ends (due to architectural design/ site situation) at its lower level (termination Level) rests on a beam which is a horizontal member. The beams in turn transfer the load to other columns below it. Such column where the load was considered as point load. Theoretically such structures can be analyzed and designed. In practice, the true columns below the termination level [usually the stilt level] are not constructed with care and more liable to failure. [1] Figure 1. All rights Reserved 1338

2 International Journal of Advance Engineering and Research Development (IJAERD) II. METHODOLOGY Following position of floating columns and shear wall in G+3 and same position using G+8.For prepare total 14 models in sap 218 is Using following data and plan of building. And prepare Models of building having G+3 and G+8 storey required to compare under earthquake motion along with provision of floating columns and re-compare the data after provision of shear walls for the same. And compare various perimeter give Results and conclusion. Following different position of floating column and shear wall are using modeling. Model No. Table 1. Model wise position of floating columns Specification 1 Normal building without floating columns G+3 2 Corner floating G.F in G+3 3 Internal floating G.F in G+3 4 Corner floating G.F and Corner Shear wall in G+3 5 Internal floating G.F and Corner Shear wall in G+3 6 Corner floating G.F and Centre Shear wall in G+3 7 Internal floating G.F and Centre Shear wall in G+3 Following data and plan are using to models prepared. Structure = SMRF = 3.5m Type of building = Residential Grade of concrete = M2 Grade of steel = Fe415 Density of concrete = 25 KN/m2 Density of brick masonry = 2KN/m2 Importance factor, I = 1. Response reduction factor, R = 5. Basic wind speed, Vb = 44m/s Terrain category = 2 Structure class = C Probability factor, K1 = 1 Topography factor, K3 = 1 Figure 2. Plan of All rights Reserved 1339

3 in mm International Journal of Advance Engineering and Research Development (IJAERD) III. RESULT AND DISCUSSION Following graphical and table show the U1 results of G+3 building in model no. 1, 3, 5, 7 different storey. Table 2. The U1 results of G+3 building in model no. 1, 3, 5, 7 different storey Normal building (G3U1mm) provide is internal (FCIG3 U1mm) shear wall is Centre(FCIG3SWCe U1mm) Ground floor shear wall is corner (FCIG3SWCo U1mm) G3 FCIG3 FCIG3SWCe FCIG3SWCo Figure 3. Comparison of U1 results of G+3 building in model no. 1, 3, 5, 7 different storey. Table 3. The U2 results of G+3 building model no.1, 3, 5, 7 different storey Normal building (G3U2mm) provide is internal (FCIG3 U2mm) shear wall is Centre (FCIG3SWCe U2mm) Ground floor shear wall is corner (FCIG3SWCo All rights Reserved 134

4 in mm in mm International Journal of Advance Engineering and Research Development (IJAERD) G3 FCIG3 FCIG3SWCe FCCIG3SWCo Figure 4. Comparison of U2 results of G+3 building model no.1, 3, 5, 7 different storey Table 4. The U1 results of G+3 building in model no. 1, 2, 4, 6 different storey. Normal building (G3U1mm) provide is corner (FCCG3 U1mm) provide is corner and shear wall is Centre (FCCG3SWCe U1mm) provide is corner and shear wall is corner (FCCG3SWCo U1mm) Ground floor G3 FCCG3 FCCG3SWCe FCCG3SWCo Figure 5. Comparison of U1 results of G+3 building in model no. 1, 2, 4, 6 different storey. Following graphical and table show the U2 results of G+3 building in model no. 1, 2, 4, 6 different All rights Reserved 1341

5 in mm International Journal of Advance Engineering and Research Development (IJAERD) Table 5. The U2 results of G+3 building in model no. 1, 2, 4, 6 different storey. Normal building (G3U2mm) provide is corner (FCCG3 U2mm) provide is corner and shear wall is Centre (FCCG3SWCe U2mm) provide is corner and shear wall is corner (FCCG3SWCo U2mm) Ground floor G3 FCCG3 FCCG3SWCe FCCG3SWCo Figure 6. Comparison of U2 results of G+3 building in model no. 1, 2, 4, 6 different storey. Figure 3, 4 and table 2, 3 give the value of horizontal and vertical is provisions of floating column is internal and share wall is Centre and corner. Figure 5, 6 and table 4, 5 give the value of horizontal and vertical is provisions of floating column is corner and share wall is Centre and corner. IV. CONCLUSIONS From above results we will concluded that 1) Results from all graphs shows that, buildings with provisions of floating columns at corners, on any floor, shows the poor performance compare to other cases. Hence corner provisions of floating columns should be considered as critical case. 2) The reduces values is compered to provision of with floating column and share wall in building more then only floating column is provision of building. 3) The values is reduces as compared to without shear wall models. 4) The values is more reduce in shear wall position is center in compared to shear wall position is corner is near about providing floating column.. 5) The values is reduces in high rise building and low rise building as compared with floating column and with floating column and shear All rights Reserved 1342

6 International Journal of Advance Engineering and Research Development (IJAERD) REFRENCES [1] Prof. A V Asha, Prof. K C Biswal Seismic analysis of multistory building with floating column International Journal of Innovative Research in Science Engineering and Technology, May 212. [2] Nakul A. Patil, Riyaz Sameer Shah Comparative Study of floating column of multi-story building by using software International Journal of Research in Engineering, Science and Technologies,ISSN , Dec215. [3] Joshi Shridhar D, Tande Shrirang N Seismic Response of Multi-Story Building with Vermicular Irregularity as Floating Columns IJIRST International Journal for Innovative Research in Science & Technology, Volume 2 Issue 11 April 216). [4] S.B.Waykule, Dr.C.P.Pise Study of Behaviour of Floating Column for Seismic Analysis of Multistory Building International Journal of Civil Engineerinsssg and Technology, Volume 7, Issue 6, December 216. [5] Sreekanth Gandla Nanabala, Arunakanthi E, Sesismic Analysis of A Normal Building and Floating Column Building International Journal of Engineering Research &Technology, Volume 3, Issue 9,September 214. [6] IS: All rights Reserved 1343