EARTHQUAKE RESISTANCE TECHNIQUE BY PTMD (PENDULUM TUNED MASS DAMPER)t


EOI: 10.11242/viva-tech.01.04.241

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Citation

Mr. Shubham Shivdas Sawant, Mr. Ashpak Raheman Shaikh, Mr. Pratik Prakash Pawar, Hiran Shrikant Sharma, "EARTHQUAKE RESISTANCE TECHNIQUE BY PTMD (PENDULUM TUNED MASS DAMPER)t", VIVA-IJRI Volume 1, Issue 4, Article 241, pp. 1-6, 2021. Published by Computer Engineering Department, VIVA Institute of Technology, Virar, India.

Abstract

The objective of this thesis is to describe the design, construction, implementation and performance of a prototype adaptive pendulum tuned mass damper (PTMD). Furthermore the thesis aims at demonstrating the performance improvements obtained when the pendulum tuned mass damper (PTMD) parameters are optimized. The study considers the effect of adjusting the PTMD tuned frequency and damping ratio on a two storey test structure subjected to broadband and narrowband excitation. An analytical model of the PTMD for a single-degree-of-freedom (SDOF) structure is used to demonstrate the performance improvements when the PTMD parameters are optimized. The optimized model considers the effects of adjusting the frequency ratio, damping ratio, and mass ratio of the combined system to reduce the maximum deflection dynamic vibration absorber when the structure is subjected to a harmonic excitation force. The analytical model is used to simulate the optimal performance of the PTMD system. The experimental PTMD is capable of identifying the structural vibration modes in real time and tuning to the desired mode. The structural vibration control modes are identified by calculating the windowed power spectral density of the structure’s acceleration, followed by peak-picking algorithm to identify the modal frequencies. Tuning is performed by moving the pivot location of the pendulum arm via a tuning frame along a set of rails. The design also allows for changes in the external dampening force. An adjustable damper is attached to the pendulum mass to allow for control of the PTMD damping ratio.

Keywords

: pendulum tuned mass damper, dynamic vibration absorber, mass ratio, vibration control, damping ratio.

References

  1. Baker, W.F., Korista, S., and Novak, L.C., 2007. Burj Dubai: Engineering the World’s Tallest Building, The Structural Design of Tall and Special Buildings, 16(4), pp.361-375
  2. Brownjohn, J.M.W., Carden, E.P., Goddard, C.R., and Oudin, G., 2010. Real-Time Performance Monitoring of Tuned Mass Damper System for a 183 m Reinforced Concrete Chimney, Journal of Wind Engineering and Industrial Aerodynamics, 98(3), pp.169-179
  3. Carpineto, N., Lacarbonara, W., and Vestroni, F., 2010. Mitigation of Pedestrian-Induced Vibrations in Suspension Footbridges via Multiple Tuned Mass Dampers, Journal of Vibration and Controls, 16(5), pp.749-776
  4. Chang, M.L., Lin, C.C., Ueng, J.M., and Hsieh, K.H., 2010. Experimental Study on Adjustable Tuned Mass Damper to Reduce Floor Vibration Due to Machinery, Structural Control and Health Monitoring, 17(5), pp.532-548
  5. Chen, G., and Wu, J., 2001. Optimal Placement of Multiple Tuned Mass Dampers for Seismic Structures, Journal of Structural Engineering, 127(9), pp.1054-1062
  6. Chey, M.H., Carr, A.J., Chase, J.G., and Mander, J.B., 2007. Design of Semi-Active Tuned Mass Damper Building Systems using Resettable Devices, 8th Pacific Conference on Earthquake Engineering, Singapore, Dec 5-7
  7. Chey, M.H., Chase, J.G., and Mander, J.B., Carr, A.J., 2010. Semi-Active Tuned Mass Damper Building Systems: Design, Earthquake Engineering and Structural Dynamics, 39(2), pp.119-139
  8. Lourenco, R., Roffel, A.J., and Narasimhan, S., 2009. Adaptive Pendulum Mass Damper for Control of Structural Vibration, CANSMART Workshop, Montreal, Quebec, Canada
  9. Matlab, 2007a, The Mathworks. Natick, MA, 2007.
  10. Mendis, P., Ngo, T., Haritos, N., Hira, A., Samali, B., and Cheung, J., 2007. Wind Loading on Tall Buildings, Electronic Journal of Structural Engineering, 7(Special Issue), pp.41-54
  11. Nagarajaiah, S., and Varadarajan, N., 2005. Short Time Fourier Transform Algorithm for Wind Response Control of Buildings with Variable Stiffness TMD, Engineering Structures, 27(3), pp.431-441