International Journal of Engineering Research and Reviews
ISSN 2348-697X (Online) Vol. 8, Issue 3, pp: (11-18), Month: July - September 2020, Available at: www.researchpublish.com
COMPARITIVE STUDY OF CSA AND LSA OF RCC BUILDING WITH EXTERNAL AND INTERNAL FLOATING COLUMN RESTING ON RCC TRANSFER GIRDER Aayushi Chawla 1, Ms Deepti Surana 2, Dr. Vijay Rode 3 1 2
Student, Department of Civil Engineering SGSITS Indore
Co-Guide and. Prof. Department of Civil Engineering SGSITS Indore 3
Guide and. Prof. Department of Civil Engineering SGSITS Indore
Abstract: Floating columns are very common these days and are adopted to increase the built up area on the floor. Floating column can be considered as structural vertical irregularities in buildings and it is highly undesirable in building built in seismically active areas. This paper presents the comparative study of behaviour of irregular building with floating column and is compared with construction sequential analysis. The crack width calculation is also done on transfer girder in order to check for structural failure. The study is subjected to gravity loads includes the analysis of irregular building with internal and external floating column .The analysis is done by using ETABS software by equivalent static method. The outcome of this analysis will help to understand how the behaviour of structure’s response with Construction Sequence Analysis and conventional analysis with vertical discontinuity and mass irregularity in the structure. Keywords: Floating columns, Construction, structural failure.
1. INTRODUCTION Since a long time the multi-storied building frame have been analysed on the assumption that whole of the load is applied to the completed frame structure with all the loads acting on the building that are gravity loads(dead load (weight of building and contents i.e. self-weight), live loads (floors , roof , snow live loads)), lateral loads(wind load , earthquake loads , loads due to earth pressure , water pressure, blast and impact) which are applied on the completed frame at a given instant as a single step analysis. But in actual practice the dead load due to each structural component and finishing items are imposed in separate stages as the building frame is constructed story by story in a sequential order. The performance of a building structure with the various load applied in a single step differ significantly from that when the loads are applied in stages. Hence, in order to analyse the structure according to the actual construction practices this is known as construction sequence analysis (CSA). Construction sequence analysis is also known as staged construction analysis which is a nonlinear static form of analysis which takes into account the concept of incremental loading. Sequential analysis is becoming an essential part in design package. However this nonlinear static analysis is not so popular because of lack of knowledge about its necessity and scope. Like so many other analysis, construction sequential analysis had specific purposes in design phase of the structures.
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