An Investigation of an Innovative Diagonal Brace-Brake Pad Friction Damper via Experimental and Numerical Methods
الموضوعات :
Mehdi Shalchi Tousi
1
,
Ata Hojatkashani
2
,
Leila Haji Najafi
3
,
Mohammadreza adibramezani
4
1 - Department of Civil Engineering, Islamic Azad University South Tehran Branch, Tehran, Iran
2 - Assistant Professor, Department of Civil Engineering, Islamic Azad University South Tehran Branch, Tehran, Iran; (corresponding author)
3 - Assistant Professor, Department of Civil and Environmental Engineering, of Technology, Tehran, Iran
4 - Assistant Professor, Department of Civil Engineering, Islamic Azad University South Tehran Branch, Tehran, Iran
الکلمات المفتاحية: diagonal-braced frames, Seismic mitigation, Brake pad friction damper, Cyclic loading, Experimental examination, Numerical analysis, Response Modification Factor, Brace-friction damper structural system.,
ملخص المقالة :
Earthquakes represent a considerable hazard to braced steel frames, thereby underscoring the necessity for economically viable mitigation strategies. Braced steel frames are extensively employed in construction owing to their exceptional strength and rigidity. Nevertheless, their intrinsic stiffness may result in substantial damage during seismic occurrences. This investigation examines a potentially effective solution: brake pad friction dampers. A comprehensive experimental-numerical analysis is presented to evaluate their energy dissipation properties. An experimental assessment under cyclic loading is conducted to ascertain the performance of individual damper components. Finite element simulations employing ABAQUS and OPENSEES scrutinize the efficacy of such dampers when incorporated into diagonal brace braced frames subjected to seismic forces. This research endeavors to elucidate the seismic performance of brake pad friction dampers in diagonal braced, with an emphasis on their capacity to enhance seismic performance. The findings bear significant potential for the formulation of innovative and cost-efficient solutions for earthquake-resistant infrastructures. Furthermore, to augment the comprehension of seismic performance enhancement, a numerical study is performed to quantify the Response Modification Factor. The influence of the friction brake pad (FBP) on the R factor of brace-friction damper structural systems is analyzed through push-over assessment. Subsequent investigations will explore optimal damper design parameters and specifications, including a range of damper capacities.
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