Application of Dampers for Seismic Strengthening of A Multistorey Frame Budholiya Shubhankar1,*, Gupta Chhavi2,** 1Student M. Tech Structural Engineering, School of Engineering and Technology, Sharda University, Greater Noida, India 2Assistant Professor, School of Engineering and Technology, Sharda University, Greater Noida, India *Corresponding author email id: Shubh.budholiya@gmail.com
**chhavi.gupta@sharda.ac.in
Online published on 4 June, 2018. Abstract The earthquake forces cause severe damage to the structures. In recent times, the seismic strengthening becomes necessity and many techniques are evolved. The technique of passive energy dissipation is being used very widely. The various passive energy dissipation techniques are energy dissipation devices, base isolation technique and dynamic oscillators. The energy dissipation devices are friction damper, fluid viscous damper, metallic dampers and viscoelastic dampers. This article presented the vibration control of a G+4 storey frame (TK Dutta, Seismic analysis of structures) subjected to dynamic excitation using friction damper device. The frame under study has mass (m) at each floor and stiffness (k/2) at each column. The young modulus (E) is 2×104 N/m2. Moment of inertia of the element is calculated by equation kl3/12E.. The value of damping ratio (#) is 5%. The support condition is fixed. The friction damper has stiffness, yield strength (slip load), post-yield stiffness ratio and yield exponent. Preliminary the time history analysis of frame under study is performed under various earthquake history data available to us. The result of the passive control of vibration using friction damper by SAP2000 software is presented. Then the time history analysis of frame under study with changing the position of the device is performed to find out the most optimum position which is efficient and economical. It is also observed that for some earthquake history (Loma Prieta), device is not controlling the displacement and acceleration as negative value of percentage controlled is coming. The future scope of this study is to use the combination of other device with the friction damper for the reduction in displacement and acceleration of the structure. Top Keywords Friction damper, Passive energy dissipation, SAP2000, El Centro. Top |