International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 07 | July -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 785 Construction Sequence Analysis of Multistoried RCC Building Kiran Y. Naxane 1 , Prof. Mr. Laxmikant Vairagade 2 , Mrs. Gitadevi B. Bhaskar 3 1 M-Tech. Student(SE), Department of Civil Engineering, GHRAET, Nagpur, Maharashtra, India 2,3 Assistant Professor, Department of Civil Engineering, GHRAET, Nagpur, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - Most of the Building frames are analyzed as single step using linear static analysis on the assumption that the frame is subjected to the full load once the whole structure are constructed completely. But in practice dead load due to the each frame components are imposed in separate stages as the frame is constructed story by story. Accordingly, the stability of frame varies from every construction stage. Even a freshly placed concrete floor is supported by previously cast floor by formwork. Hence, difference in the theoretical analysis and the actual construction practice leads to the variation in the performance of the structure. Therefore, the frame should be analyzed at every construction stage taking into account variation in loads, phenomenon is known as Construction Stage Analysis. In this paper the effect of sequential construction has been studied on rigid RC frame of different configurations. These structures have been analysed for sequential loading and the analysed results have been compared with the single step analysis for structure having same configuration. The variation in axial deformation, axial force, Bending moments and Shear forces were calculated. Key Words: Non linear analysis, Construction sequence analysis, multi-storeyed building, floating column, ETABS. 1. INTRODUCTION Over a long period of time the multistoried 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 is self-weight, superimposed load, live load and lateral loads 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 non- linear static form of analysis which takes into account the concept of incremental loading. The structural analysis of multistory buildings is one of the areas that have attracted a great deal of engineering research efforts and designers attention. There is one area; however which has been ignored by many previous investigators, i.e. the effects of construction sequence analysis in a multistory frame. The structural members are added in stages as the construction of a building proceeds and hence there dead load is carried by the part of the structure completed at the stage of their installation. Therefore, the distribution of displacement and stresses in a particular story does not depend on the properties of the members which are yet to be constructed. The correct distribution of the displacement and stresses of any member can be obtained by accumulating the results of analysis of each stage of building frame structure. Construction sequential analysis is becoming an essential part during analysis as much well recognized analysis software included this facility in their analysis and 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. As it is mentioned earlier, it deals with nonlinear behavior under static loads in the form of sequential load increment and its effects on structure considering the structural members are started to react against load prior of completing the whole structure. For finite element analysis one of the leading analysis software DzETABS ȋExtended ͵D analysis of building systemsȌdz is used and all displacement outcomes are measured in meter while moment and axial load are measured in KN-m and KN respectively. 2. RESEARCH METHODOLOGY In conventional design all the design checks such as strength, stability and deflection are performed by considering the application of loading in single step. But in reality the behavior of structure is different as the deflection of the components is different due to the self-weight which acts sequentially. The structural self-weight, external loads, boundary conditions and materials are depended on stages during the construction process and their variations are overlooked in conventional design which is nothing but a limitation of conventional design procedure. Non-linear static load case has to be generated to analyse the structure step by step which represents the sequential load case. Grouping of each story is considered during analysis so that software can identify its total steps required for completing the procedure. Step by step analysis, considering nonlinear behavior of materials from previous step, ensures that the construction