Performance Based Analysis of RC Framed Structure with and without Dampers for Different Seismic Zones
by Ritu T Raj | Dr. S Vijaya | Dr. B Shivakumara Swamy | Mary Bhagya Jyothi. J "Performance Based Analysis of RC Framed Structure with and without Dampers for Different Seismic Zones"
Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020,
Paper Url: https://www.ijtsrd.com/engineering/civil-engineering/35702/performance-based-analysis-of-rc-framed-structure-with-and-without-dampers-for-different-seismic-zones/ritu-t-raj
he primary requirement of humans on planet earth is food, clothing and shelter. Prehistoric men and women used to live on trees but steadily they started developing the shelters for protection against natural calamities like rains, cold etc. and also from attack against wild animals. Soon humans grew in knowledge and they started living together, forming communities to ensure additional security and man became a social animal. Now these communities developed and started exploding forming villages which later on transformed into cities and became the commercial centres of a region. Soon within these commercial centres, land for horizontal expansion became extinct. The social animal started expanding vertically constructing multi storied structures. The present study focuses on 12 levelled multi storey structure. The structures are considered to be located at various seismic zones. The Performance of the structure is found out by static nonlinear structure. Further, these structures are provided with seismic dampers. The Modelling and analysis are carried out using ETABS software. The performance of these structures is studied and compared using various parameters such as displacement, storey drift, base shear and time period. Along with these results performance of building is predicted based on demand capacity graphs. The results are extracted and conclusions are drawn.From the pushover analysis, the performance point is found out for all the models. And also, it found that, weakest junctions of the models. The Pushover analysis shows the models with dampers are having base shear than the models without damper. The increase in percentage of base shear is around 45 . The introduction of damper causes the improvement in lateral load carrying capacity by 45 . The base shear values are lesser for Zone II and highest for Zone V. There is a linear increase in base shear values for increase in severity of zones. From the pushover analysis base shear, it is noticed that all the models are having lesser base shear values in case of equivalent static analysis than pushover analysis except Model type A4. This shows that, the model Type A4 is UNSAFE. The models can be made SAFE by introducing Dampers as in Models Type B4.
Progressive Collapse Analysis of Multi Storey Steel Structure with Bracing Systems using E Tabs
by Rekha M N | Dr. S Vijaya | Dr. B Shivakumara Swamy "Progressive Collapse Analysis of Multi Storey Steel Structure with Bracing Systems using E-Tabs"
Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020,
Paper Url: https://www.ijtsrd.com/engineering/structural-engineering/33544/progressive-collapse-analysis-of-multi-storey-steel-structure-with-bracing-systems-using-etabs/rekha-m-n
Progressive collapse refers to the phenomenon in which the local damage of a primary structural element leads to total or partial structural system failure, without any proportionality between the initial and final damage. Even if the probability of structural collapse is low, if it occurs, it can cause significant losses. In the past few decades, many incidents of the total or partial collapse of structures due to fire, explosions or impacts have occurred. In the present study, Multi storey structure is considered. The modelling and analysis are carried out using E tabs software. The different bracing systems are used to analysis the structural behavior. The Structure is later verified for progressive collapse analysis at 3 different locations such as corner, Centre and middle of the structure. The progressive analysis is carried out and results are extracted and discussed. The displacement control can be easily achieved by providing bracings. The displacement of bare frame models can be reduced by 55 , 55 and 63 by adopting bracings such as Diagonal bracing, V Bracing and X Bracing systems. The progressive collapse analysis shows the failure of upper level beams. It is estimated that, the maximum increase in percentage of DCR value for beams are around 38 , 52 and 59 for location A, B and C respectively. And hence the beams are super designed for these additional capacities to avoid progressive collapse. From the overall results, it is concluded that, the bracings are very much necessary for the reductions of displacement and drift effect in a building. However, its Importance is not of much use in case of progressive collapse state. The X Bracings are preferred for bracing system.
Dynamic Analysis of Steel Structure with Bracings and Dampers under Wind and Earthquake Loads
by Pooja V | Dr. S Vijaya | Dr. B Shivakumaraswamy | Kavya H K "Dynamic Analysis of Steel Structure with Bracings and Dampers under Wind and Earthquake Loads"
Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020,
Paper Url: https://www.ijtsrd.com/engineering/civil-engineering/33436/dynamic-analysis-of-steel-structure-with-bracings-and-dampers-under-wind-and-earthquake-loads/pooja-v
In India residents are increasing gradually and the necessary land for living. It is a key requirement to survive anywhere. For that reason multi story building are best choice for construction in Metro cities where a smaller amount of property is presented. As designer knows multi story structure provides large floor area in small area and it is beneficial also. Hence, it is required to assemble high rise structure. If high rise structures are constructed than many structural troubles come to pass, such as lateral load effect, lateral displacement and stiffness etc. Normally for high rise structure wind and earth quake load effects are prevailing. In the present study, a 15 storey building is considered. The structure is subjected to both wind and dynamic loadings. The Modelling and analysis are carried out using ETABS software. The structure is further stabilized by providing the Bracing system and Viscous Dampers. The performance of these structures is studied and compared using various parameters such as displacement, storey drift, base shear and time period. The results are extracted and conclusions are drawn.
