Performance Evaluation of a Multistorey Steel Frame with Viscous Fluid Dampers in Lower Toggle Configuration
J. Premalatha1, M. Palanisamy2
1J. Premalatha Professor, Department of Civil Engineering Kumaraguru College of Technology, Coimbatore (TamilNadu), India.
2M. Palanisamy Professor, Department of Civil Engineering Balaji Institute of Technology and Science, Lakenpally, Narsampet, Warangal (TamilNadu), India.
Manuscript received on 10 December 2018 | Revised Manuscript received on 17 December 2018 | Manuscript Published on 30 December 2018 | PP: 327-331 | Volume-8 Issue- 2S December 2018 | Retrieval Number: BS2658128218/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open-access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The performance evaluation of a 20-Storey steel moment resisting frame [1] incorporated with viscous fluid dampers in lower toggle configuration under earthquake loads was carried out using SAP 2000 software. The time history analysis was carried out with El Centro, Kobe, Northridge and S_Monica earthquake time histories. The peak ground acceleration (PGAs) for the model building is assumed as 0.35g. The Time history analysis for bare frame and the frame with dampers placed in six different configurations were done to find their optimum placing to perform better under earthquake forces. The absolute acceleration (a), displacements (d), inter-storey drifts (dr) produced in all six different model frames with different configurations of lower toggle mechanisms due to earthquake forces are found out. The optimum damper configuration was arrived from the analytical results. The peak average response reduction values for the optimum Lower toggle configuration of viscous dampers in the model frame are found out as 69.0, 59.1 and 68.6 for absolute acceleration, maximum displacements and inter story drifts respectively.
Keywords: Time History Analysis, Inter-storey Drifts, Lower Toggle, Energy Dissipation Devices.
Scope of the Article: Computational Techniques in Civil Engineering