Comparative Study on Seismic Analysis of Multi Storey RCC Building with Mass Irregularities Using NBC 105:2020 and IS 1893:2002
Keywords:
Base shear, Storey Shear, Seismic Analysis, Storey DriftAbstract
Today there is increasing population and demand of housing is increasing day by day, because of which multi storied buildings are constructed. These buildings are vulnerable to earthquake because of non
uniform distribution of loads as well as no uniform stiffness in building. As the form of building depends upon the requirements of the client the building may be subjected to the mass irregularity as well as stiffness irregularity. The building which have mass irregularity and stiffness irregularity must be safe during earthquake .Building should be able to withstand the earthquake force and should perform better when earthquake hit that building.In Nepal both IS code and NBC is use for analyzing the building for its performance against earthquake. Because of similar topography of India and Nepal. Nepal allow the use of IS code as well as its own code for the seismic analysis of structure. In Nepal new code is implemented removing the defects of old NBC 1994. In Nepal now NBC 105:2020 is followed for analysis of building .Nepal is located in earthquake prone zone seismic performance of building must be done for the design of any building within its territory. Hence, for the optimum performance of building regarding seismic performance, it has been seen that designers undertake the design considering both IS Code and NBC code. Here, we study the performance of building comparing Nepal building code with that of IS 1893:2002. In this paper, regular building G+7 with plan area 15mX15m is taken for the analysis and beam and column size are taken constant. The building is analyzed using ETABS 2016. Comparison is made for the displacement,drift,store shear, storey stiffness and base reaction.
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