International Journal of Advanced Engineering Research and Science (IJAERS) [Vol-5, Issue-3, Mar- 2018] https://dx.doi.org/10.22161/ijaers.5.3.24 ISSN: 2349-6495(P) | 2456-1908(O) www.ijaers.com Page | 192 Analysis of Irregular High Raised RCC Buildings by Using Tuned Mass Damping System B. Siva Konda Reddy 1 , A. Madhavi Latha 2 , Ch.Srikanth 3 1 Dept. of Civil Engg., JNTUH College of Engineering, Hyderabad, T.S, India 2 Water Resource Department, A.P, India 3 I&CAD Department, T.S, India Abstract— Tall buildings are indispensable in urban areas due to high cost of land, shortage of open spaces and scarcity of lands. The tall buildings are in general highly vulnerable to lateral forces arising out of cyclones and earthquakes. Designing the structures to withstand these occasional lateral forces is very expensive; hence it is not always desirable. The measures to reduce the lateral forces are by way of reducing the weight of the structure and by reducing the exposed faces to thwart wind. However the architectural requirement and the utility of the building have to be honored at all times by the structural designer. Though the technique of Tuned mass damping (TMD) is very well appreciated, the mathematical implications involved in finding the magnitude of mass, stiffness and damping of the TMD is highly intricate and suitable TMD system for a given building structure, which shall remain an integral part of the structure itself, placed on top of the building yet serves the purpose of reducing the earthquake effects on buildings. The TMD methodology adopted for three irregular R.C. framed models having + (Plus)-shape , C-shape and T- shape in plan. This apart the device shall find its utility for all zones of seismic activity and ground/structural conditions and introduces various structural motion control methodologies with focus on tuned mass damping systems. The control properties and some aspects of TMD parameters are outlined. ETABS software is used for dynamic analysis of various shapes of the framed buildings. Keywords— Irregular High Raised RCC Buildings, Tuned Mass Damping System, Dynamic analysis. I. INTRODUCTION To perform better analysis of Irregular High Raised RCC Buildings the Tuned mass damper (TMD) system is applied which involves in positioning of a structure over an existing building to reduce the effects of dynamic loads. The TMD will have a certain mass, damping and stiffness. Tuning of TMD refers to suitably adjust in the values of mass, damping and stiffness to reduce the dynamic effects of given building subjected to dynamic forces/displacements. The TMD concept was first applied by Frahm in 1909 to re rolling motion of ships as well as ship hull vibrations. However not much of headway was made in possible is the field of TMD due to absence of rational theories of structural dynamics. At present with the advent of computer aided packages it is possible to apply reasonably valid dynamic theories coupled with parametric studies to assess the contribution of the TMD in reducing the effects of dynamic loads on the structure. This project presents the effectiveness of tuned mass dampers work for in reducing the seismic response of structure, duly ensuring its structural stability when subjected to earth quake loads. The concept of TMD is still not understood for real time structures, more so when damping is involved. In this context, a brief insight into the concept of TMD is presented. Tuned mass damper (TMD) which is a passive energy absorbing device consisting of a mass, a spring and a damper. The frequency of the damper is tuned to a particular Structural frequency. so that when that frequency is excited, the damper will resonate out of phase with the structural motion. Energy is dissipated by the damper inertia force acting on the structure. There are many types of TMD systems which can be adopted for different kinds of structural systems. In this present work it is proposed to develop a TMD system which is easily constructible economically viable and easily maintainable. II. ANALYSIS 2.1. Problem Definition In present case study three irregular R.C. framed models with Fifteen (15) storey's were taken up and modeled using ETABS package.. The models are + (plus) -shape in plan, C-shape and the other is T-shape (from "Fig.1 to 3"). The + (Plus) - shaped building has plan dimensions of 100.0 m (25 bays of 4.0 m each) x 100.0 m (25 bays of 4.0 m each).The C-shaped building has plan dimensions of 68.0 m (17 bays of 4.0 m each) x 52.0 m (13 bays of 4.0 m each). The T-shaped building has plan dimensions of 100.0 m (25 bays of 4.0 m each) x 60.0 m (15 bays of 4.0 m each). The height of each storey is 3.5 m. The tuned