International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 01 | Jan-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 849 SEISMIC PERFORMANCE OF HIGH RISE FLAT SLAB BUILDING WITH VARIOUS LATERAL LOAD RESISTING SYSTEMS Pooja Biradar 1 , Kishor Kulkarni 2 , Nikhil Jamble 2 1 Post graduate student in structural engineering, KLEMSSCET, belagavi, Karnatka, India 2 Assistant Professor, Dept. of Civil Engg, KLEMSSCET, Karnataka, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract – In modern era, the construction of flat slab building is increasing everywhere, due to its major advantages such as architectural flexibility and lesser cost of construction. The use of flat slab in high seismic area is a risk as it is not efficient in resisting lateral loads. The study is considered about increase in lateral load carrying capacity of building by using shear walls, perimeter beams and bracing system. In this study 15 storied flat slab building is analyzed for different lateral load resisting system using time history method. For the time history method, realistic BHUJ earthquake data is used and analysis is carried out by commercially available software ǮETABs v9iǯ. The comparison of different lateral load resisting system (LLRS) is made by using various parameter such as maximum storey displacement, storey drift, time period and base shear. Key Words: Flat Slab, Shear Wall, Bracings, Mode Shapes. 1. INTRODUCTION India is a developing country and there is a huge growth in infrastructure development. As the population of India is increasing day by day there is high demand of land for construction. Since, most of the land is preserved for agriculture and farming, there is need for space for human dwelling hence development in vertical construction is necessary. Nowadays there is increase in number of tall buildings which are used for both commercial and residential purposes. When the height of the building increases it is important to counteract the lateral forces such as seismic and wind forces acting on the building. Normally the buildings are designed to counteract the gravity loads acting on it and to attain required strength and stability. Usually buildings are designed to resist gravity loads such as dead loads and live loads but other than these other loads acting laterally on the building such as earthquake and wind loads which may also act on it. To resist these lateral loads extra Lateral Load Resisting System (LLRS) is to be included in tall buildings. Lateral loads can develop high stresses and large lateral displacement. Therefore, it is very important for the structure to have adequate stiffness to resist lateral force along with strength to resist gravity loads. In modern era, along with the construction of high rise building there is also need to emphasis on the aesthetic view of the building and lesser cost of construction along with architectural flexibility. Hence modern trend is to construct high rise building with flat slab floor system. [1] 1.1 Objectives of Study Based on the literature the following objectives are proposed for the present study  To determine the better lateral load resisting system for high rise buildings with flat slabs under seismic effects.  To determine the variation in lateral displacement, story drift, time period and base shear by using various lateral load resisting systems. 2. STRUCTURAL MODELLING AND ANALYSIS In the present study multistoried building with flat slab system is modeled and analyzed for seismic forces. The various parameters are considered to make it seismic resistance. The different locations of shear wall at different locations and combination of bracing and shear wall system. Eight models are considered for the study. The analysis is carried out using commercially available software ǮETABSǯ ͻ vi. The details of multistoried flat slab building are given in Table 1. Figure 1 shows the plan of Reinforced Concrete (RC) flat slab building modeled in ETABSǯ ͻ vi. Table 1: Details of multistoried flat slab building Type of building Commercial building Plan area ͵ͷmX͵ͷm Storey height ͵.͹ͷm Total height of building ͷͶ.ͷm Bays ͷ bays in X and Y-direction Spacing of bays ͹m Type of soil Type ))ȋ Medium soilȌ Earthquake zone ))) Location of building Pune