Sensitivity Analysis of LRB Isolator for RC Shear Frame

Author(s):

Mahesh Kumar C L , Acharya Institute of Technology; Shwetha K G, NM Institute of Technology; Amrutharani H R, Akshaya Institute of Technology ; Jagadeesh B N, Akshaya Institute of Technology

Keywords:

LRB; Stiffness; Mass; Natural Frequency

Abstract:

In the past due to earthquakes many concrete structures are severely damaged. This has indicated the need for evaluating the seismic adequacy of existing buildings. In particular, the seismic rehabilitation of aged concrete structures in high seismic areas is a matter of growing concern, since structures vulnerable to damage must be identified and an acceptable level of safety must be determined. Sensitivity analysis plays a critical role in inverse and identification studies, as well as numerical optimization and reliability analyses for the structural engineers. Sensitivity analysis of structures to dynamic loads is essential for the structural engineers to identify the response variables that are important to the response of the system. Then it is essential to understand any change in the physically identifiable design variable of the structural system affect the response variable. When the structural engineer studies the relationship between the response variables and the design variables, it is possible to achieve the value of response variable toward a desired value. This analysis to understand the relationship between stiffness (k), mass (m), and damping co-efficient (c) is termed as the sensitivity analysis. The present work focuses on determining the effectiveness of lead rubber bearing isolator by determining the parameters like displacement, storey drift, frequency, base shear force, mass and stiffness for various frames with fixed base (without base isolation) and with base isolation. The performance of Lead Rubber Bearings(LRB) is check by sensitivity of stiffness, mass & natural frequency.

Other Details:

Manuscript Id	:	IJSTEV2I1011
Published in	:	Volume : 2, Issue : 1
Publication Date	:	01/08/2015
Page(s)	:	25-32

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