Structural Engineering and Mechanics

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Seismic mitigation of an existing building by connecting to a base-isolated building with visco-elastic dampers

  • Yang, Zhidong (Department of Civil & Environmental Engineering, The Hong Kong Polytechnic University) ;
  • Lam, Eddie S.S. (Department of Civil & Environmental Engineering, The Hong Kong Polytechnic University)
  • Received : 2013.04.29
  • Accepted : 2014.06.19
  • Published : 2015.01.10
⟨ Previous Next ⟩

Abstract

This study investigates the feasibility of retrofitting an existing building by connecting the existing building to a new building using connecting dampers. The new building is base-isolated and viscoelastic dampers are assigned as connecting dampers. Scaled models are tested under three different earthquake records using a shaking table. The existing building and the new building are 9 and 8 stories respectively. The existing building model shows more than 3% increase in damping ratio. The maximum dynamic responses and the root mean square responses of the existing building model to earthquakes are substantially reduced by at least 20% and 59% respectively. Further, numerical models are developed by conducting time-history analysis to predict the performance of the proposed seismic mitigation system. The predictions agree well with the test results. Numerical simulations are carried out to optimize the properties of connecting dampers and base isolators. It is demonstrated that more than 50% of the peak responses can be reduced by properly adjusting the properties of connecting dampers and base isolators.

Keywords

References

  1. Bhaskararao, A. and Jangid, R. (2006), "Seismic analysis of structures connected with friction dampers", Eng. Struct., 28(5), 690-703. https://doi.org/10.1016/j.engstruct.2005.09.020
  2. Brincker, R., Zhang, L. and Andersen, P. (2001), "Modal identification of output-only systems using frequency domain decomposition", Smart Mater. Struct., 10(3), 441.
  3. Christenson, R.E., Spencer Jr, B., Hori, N. and Seto, K. (2003), "Coupled building control using acceleration feedback", Comput. Aid. Civil Inf., 18(1), 4-18. https://doi.org/10.1111/1467-8667.00295
  4. Christenson, R.E., Spencer, Jr. B. and Johnson, E.A. (2007), "Semiactive connected control method for adjacent multidegree-of-freedom buildings", J. Eng. Mech., 133(3), 290-298. https://doi.org/10.1061/(ASCE)0733-9399(2007)133:3(290)
  5. Constantinou, M.C., Soong, T.T. and Dargush, G.F. (1998), Passive energy dissipation systems for structural design and retrofit, Multidisciplinary Center for Earthquake Engineering Research Buffalo, NY
  6. Datta, T.K. (2010), Seismic analysis of structures, Wiley, Singapore.
  7. GB50011-2010 (2010), Code for seismic design of buildings, Chinese Architecture & Building Press, Bei Jing.
  8. Hemez, F.M. and Doebling, S.W. (2001), "Review and assessment of model updating for non-linear, transient dynamics", Mech. Syst. Signal Pr., 15(1), 45-74. https://doi.org/10.1006/mssp.2000.1351
  9. Humar, J.L. (2012), Dynamics of structures, CRC PressI Llc
  10. Kim, J., Ryu, J. and Chung, L. (2006), "Seismic performance of structures connected by viscoelastic dampers", Eng. Struct., 28(2), 183-195. https://doi.org/10.1016/j.engstruct.2005.05.014
  11. Lamarche, C., Paultre, P., Proulx, J. and Mousseau, S. (2008), "Assessment of the frequency domain decomposition technique by forced-vibration tests of a full-scale structure", Earthq. Eng. Struct. D., 37(3), 487-494. https://doi.org/10.1002/eqe.766
  12. Li, C., Lam, S., Zhang, M. and Wong, Y. (2006), "Shaking table test of a 1: 20 scale high-rise building with a transfer plate system", J. Struct. Eng., 132(11), 1732-1744. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:11(1732)
  13. MacLeod, I.A. (2005), Modern Structural Analysis: Modelling Process and Guidance, Thomas Telford, London.
  14. Matsagar, V.A. and Jangid, R. (2006), "Base-isolated building connected to adjacent building using viscous dampers", Bull. New Zealand Soc. Earthq. Eng., 39(1), 59-80.
  15. Matsagar, V.A. and Jangid, R.S. (2005), "Viscoelastic damper connected to adjacent structures involving seismic isolation", J. Civil Eng. Manag., 11(4), 309-322. https://doi.org/10.1080/13923730.2005.9636362
  16. Ng, C.-L. and Xu, Y.-L. (2006), "Seismic response control of a building complex utilizing passive friction damper: Experimental investigation", Earthq. Eng. Struct. D., 35(6), 657-677. https://doi.org/10.1002/eqe.549
  17. Roh, H., Cimellaro, G.P. and Lopez-Garcia, D. (2011), "Seismic response of adjacent steel structures connected by passive device", Adv. Struct. Eng., 14(3), 499-517. https://doi.org/10.1260/1369-4332.14.3.499
  18. Seto, M., Toba, Y. and Matsumoto, Y. (1995). "Reduced order modeling and vibration control methods for flexible structures arranged in parallel", Proceedings of the American Control Conference.
  19. Xu, Y.L., Chen, J., Ng, C. and Qu, W. (2005), "Semiactive seismic response control of buildings with podium structure", J. Struct. Eng., 131(6), 890-899. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:6(890)
  20. Xu, Y.L., He, Q. and Ko, J. (1999a), "Dynamic response of damper-connected adjacent buildings under earthquake excitation", Eng. Struct., 21(2), 135-148. https://doi.org/10.1016/S0141-0296(97)00154-5
  21. Xu, Y.L. and Ng, C. (2008), "Seismic protection of a building complex using variable friction damper:experimental investigation", J. Eng. Mech., 134(8), 637-649. https://doi.org/10.1061/(ASCE)0733-9399(2008)134:8(637)
  22. Xu, Y.L., Zhan, S., Ko, J. and Zhang, W. (1999b), "Experimental investigation of adjacent buildings connected by fluid damper", Earthq. Eng. Struct. D., 28(6), 609-631. https://doi.org/10.1002/(SICI)1096-9845(199906)28:6<609::AID-EQE831>3.0.CO;2-S

Cited by

  1. Comparing the dynamic behavior of a hospital-type structure with fixed and isolated base vol.9, pp.3, 2015, https://doi.org/10.12989/eas.2015.9.3.657
  2. Retrofitting of a weaker building by coupling it to an adjacent stronger building using MR dampers vol.62, pp.2, 2015, https://doi.org/10.12989/sem.2017.62.2.197
  3. Seismic mitigation of substation cable connected equipment using friction pendulum systems vol.72, pp.6, 2015, https://doi.org/10.12989/sem.2019.72.6.785