http://www.iaeme.com/ijptm/index.asp 68 editor@iaeme.com International Journal of Production Technology and Management (IJPTM) Volume 10, Issue 1, January-June, 2019, pp. 68–76, Article ID: IJPTM_10_01_007 Available online at http://www.iaeme.com/ijptm/issues.asp?JType=IJPTM&VType=10&IType=1 Journal Impact Factor (2019): 7.2150 (Calculated by GISI) www.jifactor.com ISSN Print: 0976- 6383 and ISSN Online: 0976 – 6391 DOI: 10.34218/IJPTM.10.1.2019.007 © IAEME Publication EXPERIMENTAL INVESTIGATION OF A PORTAL FRAME USING MAGNETORHEOLOGICAL FLUID DAMPER G. Sailaja* Assistant Professor, Dept. of Mech. Engg., MJCET, Banjara hills, Hyderabad, India N. Seetharamaiah Professor, Dept. of Mech. Engg., MJCET. Banjara hills, Hyderabad, India Maganti Janardhana Professor, Dept. of Civil Engg, JNTU Hyderabad, India *Corresponding Author ABSTRACT A Magnetorheological fluid (MRF) damper gives a real solution for semi-active vibration control in vibrations for structures. The performance of the MRF damper depends significantly on the electromagnetic circuit which is integrated into it. The force which is developed by MR fluid damper is greatly influenced by the magnetic flux density induced in the fluid flow gap. In the fields of Civil and Mechanical Engineering, Magnetorheological fluid (MRF) damper based semi-active systems offer protection to structures subjected to mechanical vibrations and also lateral loads due to wind and earthquake forces. In the present work, structural and magnetic analysis of the MR damper is studied and also, the dynamic behavior of a frame when subjected to different forcing frequencies has been discussed. Key words: MR Fluids, SMRF, HMRF, MR Fluid Damper, Structural vibrations. Cite this Article: G. Sailaja, N. Seetharamaiah, Maganti Janardhana, Experimental Investigation of a Portal Frame Using Magnetorheological Fluid Damper, International Journal of Production Technology and Management (IJPTM), 10(1), 2019, pp. 68–76. http://www.iaeme.com/ijptm/issues.asp?JType=IJPTM&VType=10&IType=1 1. INTRODUCTION Magnetorheological Fluid Damper is one of the smart fluid dampers which can be used to suppress the vibrations and to improve the performance. Out of many dampers that are being used, MR fluid damper was found to be more effective than the conventional viscous damper [1] . Magnetorheological (MR) fluid was first reported by Rabinow [2] in the year 1948 and he concluded that MR fluids are magnetic field controllable fluids. When the fluid is exposed to