TADAS dampers in very large deformations
- 136 Downloads
Triangular-plate Added Damping and Stiffness (TADAS) dampers are special kinds of passive control devices that can be used in seismic design and retrofitting of structural systems. However, when exposed to large deformations, primary members of a structure can be in danger of serious damage due to improper geometric characteristics of these dampers. In this study, response of a one bay frame equipped with a TADAS device, previously tested in the laboratory, was simulated using a detailed FE model in ABAQUS. A monotonic analysis was then conducted on the TADAS damper alone, which indicated that in large deformations, TADAS damper pins hit the top of the holes, resulting in an abrupt stiffness increase in the damper. Seismic analysis of a six story moment resisting frame with TADAS dampers, using a series of twelve scaled earthquake ground motions, was also conducted in OpenSees which indicated that with sudden stiffness increase in dampers, the value of moments in beams as well as axial forces in braces will increase, causing possible damages in these areas. At the end, a method for calculating the optimal height for the holes in the damper was proposed, which is shown to be in good agreement with detailed ABAQUS models.
KeywordsTADAS damper large deformations test simulation improper geometric characteristic structural damage
Unable to display preview. Download preview PDF.
- ASCE (2014). “Seismic Evaluation and Retrofit of Existing Buildings” ASCE/SEI Standard 41-13, American Society of Civil Engineers, Reston, VA,USA.Google Scholar
- Bergaman, D. and Goel, S. (1987). Evaluation of cyclic testing of steel-plate devices for added damping and stiffness, Report No. UMCE 87-10. University of Michigan, Ann Arbor, Michigan, USA.Google Scholar
- BHRC (2005). “Iranian code of practice for seismic resistance design of buildings.” Standard no. 2800, 3rd edition, Building and Housing Research Center.Google Scholar
- BHRC (2015). Road, Housing and Urban Development Research Center, PART SAZE SAINAR engineering Company report on TADAS damper experiments. Report No. 1122-Ó/9 (in Persian).Google Scholar
- Kelly, J.M., Skinner, R., and Heine, A. (1972). “Mechanisms of energy absorption in special devices for use in earthquake resistant structures.” Bulletin of NZ Society for Earthquake Engineering, 5(3), pp. 63–88.Google Scholar
- Kobori, T., Miura, Y., Fukusawa, E., Yamada, T., Arita, T., Takenake, Y., Miyagawa, N., Tanaka, N., and Fukumoto, T. (1992). “Development and application of hysteresis steel dampers.” Proceedings of the 10th World Conference on Earthquake Engineering, Madrid, Spain, pp. 2341–2346.Google Scholar
- McKenna, F., Fenves, G. L., Scott, M. H., and Jeremic, B. (2000). Open System for Earthquake Engineering Simulation (OpenSees). Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA,USA.Google Scholar
- MHUD (2006). “Iranian National Building Code, part 10: steel structure design.”Google Scholar
- SIMULIA (2013). ‘ABAQUS Documentation’, 6.13-1 ed. Dassault Systèmes.Google Scholar
- Tsai, K. and Li, C. (1994). “Seismic Analysis of Passive Energy Dissipation Subsystems by Hybrid Experiments.” Proceedings of the 12th International Modal Analysis, 2251, pp. 1520.Google Scholar
- Whittaker, A.S., Bertero, V.V. and Thompson, C. (1989). Earthquake simulator testing of steel plate added damping and stiffness elements, Report No. UCB/EERC-89-02. Earthquake Engineering Research Center, University of California at Berkeley, Berkeley, California, USA.Google Scholar