STUDY ON THE EFFECT OF VISCOUS DAMPER FOR RCC FRAME STRUCTURE

Puneeth Sajjan, Praveen Biradar

Abstract: Structures are mainly subjected to various types of loading conditions such as earthquake, wind loads etc. For earthquake zone areas, the structures are designed considering seismic forces. The structure which are present in higher earthquake zone area are liable to get damaged or collapsed, hence to increase the safety of these structure few retrofitting techniques or addition of materials to stabilize the structures against the earthquake forces are done. And if the retrofitting techniques are adopted then cost plays an important role and possibly few spaces will be compromised depend upon the type of methods adopted. Later the structure may be strengthened by adding materials externally to transfer the lateral loads i.e. some protective devices have been developed. In modern seismic design, damping devices are used to reduce the seismic energy and enable the control of the structural response of the structure to that1earthquake excitation. For the present study, an 8-story structure which is symmetrical in plan is modelled and analyzed using the ETABs 2015 software. The earthquake loads are defined as per IS1893-2002 (Part 1). To analyze the structure, the static and dynamic analysis method is adopted. The response spectrum function is defined to carry out dynamic analysis. To control the seismic response and to increase the stiffness of the structure, viscous damper are provided to the structure. The structure with viscous damper is modelled and analyzed with same parameters. The mechanical properties of viscous damper used in this study are as damping coefficient Cd= 810 kN-s/m and exponent as 0.3. The results obtained and compared in the form of displacement, story drift and story shear are compared.

Keywords: Structures, Dynamic Analysis, Seismic Response, Earthquake, Viscous Damper.

DOI: https://doi.org/10.15623/ijret.2016.0509005