www.ijcrt.org © 2021 IJCRT | Volume 9, Issue 7 July 2021 | ISSN: 2320-2882 IJCRT2107418 International Journal of Creative Research Thoughts (IJCRT) www.ijcrt.org d864 Design of Lead Rubber Bearing Base Isolator system for High Rise Structure SANKET VIJAY MUNOT, P.B.AUTADE Abstract—The main objective of project is to protect buildings by earthquake resistant structure. While no structure can be entirely immune to damage from earthquakes, the goal of earthquake resistant construction is to erect structures that fare better during Seismic activity than their conventional counterparts. Damper systems are designed and manufactured to protect integrities and structural damages and to prevent injuries. There are many techniques to make seismic resistant structure. The base isolation technique is used in this project to resist against earthquake. Lead Rubber Bearing is a new type earthquake resistance rubber bearing, formed by inserting lead core into ordinary laminated rubber bearing, vertical supporting, and horizontal displacement and hysteric damping are combined in single unit together. Index Terms—Base isolator, Lead Rubber Bearing, High rise structure, Horizontal and Vertical Stiffness 1 INTRODUCTION raditional seismic design of buildings is founded on struc- tural ductility and redundancy. Forces induced by severe earthquakes are reduced as a function of the energy dissi- pation capacity at the structural components and their connec- tions. Base isolation systems partially uncouple a structure from the seismic ground motion by means of specially designed, replaceable, devices inserted between the structure and its foundation. It illustrates a conventional P+10 storey building and a protected base isolated one. The conventional building reduces dynamic forces by plasticity of the structural and non- structural components. In order to understand the perfor- mance of the building under seismic effect and the effect of lateral loads on a structure, it is necessary to evaluate the time period of a structure. It is necessary to determine the signifi- cance of the time period before evaluating the time period of a structure. Time period plays an important role in estimating the lateral loads and hence contributes to the seismic assess- ment of a structure. Time period depends on mass and stiff- ness. Based on the time period which is purely dependent on stiffness and mass, the behavior of building under lateral loads can be evaluated. It is difficult to determine the exact time period. For the design of earthquake resistant structures which seem to be safe and economical, the determination of time period is necessary. In this project an attempt is done to understand the various parameters which affect the time peri- od of a building. Hence a parametric study is done on time period of a structure as per the codal provisions. IS code (IS 1893(part I):2016) is referred for the parametric study. The model is prepared and analyzed using ETABS software con- sidering various parameters in the model. The value obtained for time period as per the code and as per the software is compared. 1.1 Base Isolation system In base isolation technology during earthquake, separating the superstructure or reducing the lateral movements of building superstructure from the movement of ground or foundation. The bearings of base isolation are designed in such a way that they are stiff vertically and flexible horizon- tally to allow for the difference in lateral movement while still supporting the superstructure. a building is decoupled from the earthquake ground motion or seismic waves. When a building is decoupled from ground motion it significantly reduces response in the structure which would have affected building if it is fixed base. Base isolation decouples the building from ground motion by decreasing the fundamental fre- quency when compared to fix based building. This concept of base isolation also makes to remain building elastic during an earthquake. Base isolation concept is also used in bridges, nuclear power plants and liquid storage tanks etc. 1.2 Lead Rubber Bearing System:- Lead rubber bearing (LRB) was firstly invented by William- son in 1975. It was found in Newzeland. Lead rubber bearing is applied to building and bridge constructions, is a practical and cost-effective choice for seismic isolation. It is composed of laminated elastomeric bearing pad, top and bottom sealing & connecting plates and lead plug inserted. 1.3 components of Lead Rubber Bearing System LRB has 4 main Components which are listed below A) Upper and Bottom sealing plate :- They transfer loading and constraint defor- mation of lead core. These plates are connected to base and column These plates are connected by anchorage bolting Plates having circular cutout at center for lead ore. T