International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 08 | Aug-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 1461 SEISMIC ANALYSIS OF TALL BUILDINGS WITH AND WITHOUT BRACINGS AND STRUTS P.Pramod Kumar Reddy 1 , Prof..H.Sudarsana Rao 2 1 PG Scholar, Dept. of Civil Engineering JNTUA, Anantapur. 2 Professor & Director ICS, JNT University, Ananthapur, Abstract - As the population is increasing and available space is less, world is looking to make tall buildings to accommodate more people within available area. Due to this, tall buildings passion started. Due to movement of tectonic plates Indian land is divided into zones which represent the seismic ranges. These zones are reduced to four from five. This indicates the closeness of earthquake causing effects. If we come across the design of existing buildings we can find the lack of seismic resisting capacity. For impeccable performance of buildings we have to do the seismic analysis. Seismic analysis is performed on Three models namely DzG+ͷͺ Normal Buildingdz as Model ͷ, DzG+ͷͺ Building with Bracingsdz as Model ͸, DzG+ͷͺ Building with Single Strutsdz as Model ͹ using Equivalent static method, Response Spectrum Method and Time History Analysis. The Buildings are assumed to be located in Zone II and Zone III resting on Hard soil. From the static and dynamic analysis we can compare the three models for seismic parameters like Base shear, Storey Shears, Storey drift and Time period. For this comparison ETABS software package is used for modeling the Building Models by following the IS:1893(Part I)-2002. Key Words – Bracings, Base Shear, Equivalent static method, Response spectrum method, Storey Shear, Single Strut, Time history analysis, Time Period. 1 INTRODUCTION The composite reinforced (RC) frame buildings are becoming most preferable for Earthquake Resistant Buildings. The composite materials that are used in composite RC frame buildings are Bracings, Struts, Shear walls, etc. These Composite RC frame buildings shows great stiffness and strength than normal RC frame buildings. Due to these advantages the composite structures are capable of resisting Earthquake effects. In order to study this composite nature of buildings, Bracings and struts are considered. In order to resist the earthquake loads the external loads are to be carried to the foundation in a most effective way without any interruption. These composite materials are installed in between the columns of the building in a diagonal manner. As the weight of the building is increased, the stiffness also increases automatically. By this increase in stiffness the strength of the building also increases, which gives the resistant towards the compression and tension values. From these facts this study is carried over by taking three models, the first model is DzG+1Ͷ Normal RC frame buildingdz, the second one is DzG+1Ͷ RC frame building with Bracingsdz, the third one DzG+1Ͷ RC frame building with strutsdz. Using ETABS software seismic analysis is carried out on these three models in four zones as per IS: 1893(part I)-2002 using Static analysis and Dynamic analysis. Seismic Coefficient method also known as Equivalent static analysis is used as a static analysis and the response spectrum method is used to perform the dynamic analysis. A linear dynamic analysis namely time history analysis is used to apply the ground motions recorded during uttarakasi earthquake which occurred in