International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 04 | Apr 2024
p-ISSN: 2395-0072
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Seismic analysis of multi-storey Building on Sloping grounds with different earthquake resisting technique using ETABS Nandini Naresh Raut1, Nimish Patankar2, Prof. Pallavi Nikhil Bhende 3 1 M.Tech Computer Aided Structural Engineering Student WCEM, Nagpur 2Structural Engineer, RCC and steel structural Consultant, Nagpur
3Head of Dept. of civil Engineering WCEM, Nagpur ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Because of the current circumstances, which
amplitudes and intensities causing the earth's surface to tremble in all possible directions.
includes a growing population, expanding cities, and uneven terrain, most buildings are usually constructed on sloping terrain. The distribution of mass and stiffness in both the horizontal and vertical planes varies when a building is situated on a sloping site. These structures are susceptible to severe damage from ground motion during an earthquake because they are frequently torsional linked and situated on steep hillsides in seismically active areas. Model analysis software is done using ETABS 16. On both level and sloping surfaces, models are assessed. First, the model is subjected to a seismic analysis procedure that entails allocating various load scenarios and combinations. Among the study's findings are maximum storey displacement, overturning moment, storey drift, and storey shear. For structures of various heights, the dynamic response—basic time period, storey displacement, and base shear action caused in columns—has been examined. As is well known, reinforced concrete structures built on mountain slopes frequently have asymmetrical shapes with downward gradients, making them vulnerable to severe damage during earthquake activity. The aim of this study is to conduct a comparative examination of the results obtained from the dynamic method of earthquake analysis on reinforced concrete structures with five distinct forms, including ordinary buildings. Analysis that includes storey shear, storey drift, and storey displacement in the X and Z dimensions.
1.1 Motivation and background One of the world's most seismically active areas is the Indian Himalayas, which run from Nagaland in the northeast to Kashmir in the northwest. The Indian Zonation map places the entire area under seismic zones IV and V. The demand for multi-story Reinforced Concrete (RC) buildings has surged over the existing local traditional constructions in hilly regions due to rapid urbanization and population growth. But because the majority of these structures are not engineered, they have a great deal of issues, such as low material quality, inadequate seismic detailing and design, and disconnected vertical and horizontal building elements. During previous earthquakes, such as the 2005 Kashmir earthquake, the 2011 Sikkim earthquake, and the 2015 Nepal earthquake, significant damage was noted in these buildings.
1.2 Fundamental Natural period of a building
Key Words: - Seismic Analysis, ETABS 16, Sloping ground 1. INTRODUCTION The economic growth & rapid urbanization in hilly region has accelerated the real estate development. As a result, the hilly region's population density has significan tly expanded.In steep areas, adobe burnt brick, stone masonr y, and dressed stone masonry structures are typically constru cted on level terrain. Since level land in hilly regions is very limited, there is a pressing demand to construct buildings on hill slope. Hence construction of multi-story R.C. Frame buildings on hill slope is the only feasible choice to accommodate increasing demand of residential & commercial activities. Earth quakes are the natural phenomenon’s which are caused by the release of large strain energy by the moving faults below the surface of the earth, the lateral force
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Natural period of a building is one such important dynamic property, which has its key role during the design phase of the construction of a building. The fundamental natural period of a building is one of the significant parameters that is used to calculate the design base shear and lateral forces acting on a building, which are used in the design procedures. But as this building property cannot be computed for a structure during the initial stages of design, building codes provide empirical formulas to calculate the approximate value depending on the building material [steel, reinforced concrete etc.], structural system (frame, shear wall, etc.), and overall dimensions. But the existing expressions of fundamental natural period of a building prescribed by Indian Seismic code IS 1893:2016 are adopted from earlier versions of US codes which are originally developed based on response of buildings founded on flat ground during Californian earthquakes.
2. LITERATURE REVIEW 2.1 Prashant D, et al. (2013) - "Seismic Reaction of RC Frame One-Way Slope Building with Soft Storey" [1]. The building situated on a hillside with a 27° horizontal slope is studied to find out how the soft storey impacts the response
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