Smart Structures and Systems

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Compensation techniques for experimental errors in real-time hybrid simulation using shake tables

  • Received : 2014.04.14
  • Accepted : 2014.08.10
  • Published : 2014.12.25
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Abstract

Substructure shake table testing is a class of real-time hybrid simulation (RTHS). It combines shake table tests of substructures with real-time computational simulation of the remaining part of the structure to assess dynamic response of the entire structure. Unlike in the conventional hybrid simulation, substructure shake table testing imposes acceleration compatibilities at substructure boundaries. However, acceleration tracking of shake tables is extremely challenging, and it is not possible to produce perfect acceleration tracking without time delay. If responses of the experimental substructure have high correlation with ground accelerations, response errors are inevitably induced by the erroneous input acceleration. Feeding the erroneous responses into the RTHS procedure will deteriorate the simulation results. This study presents a set of techniques to enable reliable substructure shake table testing. The developed techniques include compensation techniques for errors induced by imperfect input acceleration of shake tables, model-based actuator delay compensation with state observer, and force correction to eliminate process and measurement noises. These techniques are experimentally investigated through RTHS using a uni-axial shake table and three-story steel frame structure at the Johns Hopkins University. The simulation results showed that substructure shake table testing with the developed compensation techniques provides an accurate and reliable means to simulate the dynamic responses of the entire structure under earthquake excitations.

Keywords

Acknowledgement

Grant : CAREER: Advanced Acceleration Control Methods and Substructure Techniques for Shaking Table Tests

Supported by : National Science Foundation

References

  1. Carrion, J. and Spencer, B.F. (2007), Model-based strategies for real-time hybrid testing, NSEL report, University of Illinois at Urbana-Champaign, NSEL-006.
  2. Carrion, J.E., Spencer, B.F. and Phillips, B.M. (2009), "Real-time hybrid simulation for structural control performance assessment", Earthq. Eng. Eng. Vib., 29(8), 481-492.
  3. Christenson, R., Lin, Y., Emmons, A. and Bass, B. (2008), "Large-scale experimental verification of semiactive control through real-time hybrid simulation1", J. Struct. Eng. - ASCE, 134(4), 522-534. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:4(522)
  4. Dyke, S., Spencer, B., Quast, P. and Sain, M. (1995), "Role of control-structure interaction in protective system design", J. Eng. Mech. - ASCE, 121(2), 322-338. https://doi.org/10.1061/(ASCE)0733-9399(1995)121:2(322)
  5. Gunay, M.S. and Mosalam, K.M. (2012), "Investigation of the response of electrical insulator posts using real-time hybrid simulation on a smart shaking table", Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal.
  6. Igarashi, A., Iemura, H. and and Suwa, T. (2000), "Development of substructured shaking table test method", Proceedings of the 12th World Conference on Earthquake Engineering, Auckland, New Zealand.
  7. Igarashi, A., Sanchez-Flores, F., Iemura, H., Fujii, K. and Toyooka, A. (2009). "Real-time hybrid testing of laminated rubber dampers for seismic retrofit of bridges", Proceedings of the 3rd International Conference on Advances in Experimental Structural Engineering, San Francisco, USA.
  8. Ji, X, Kajiwara, K, Nagae, T, Enokida, R. and Nakashima, M. (2009), "A substructure shaking table test for reproduction of earthquake responses of high-rise buildings", Earthq. Eng. Struct. D., 38(12), 1381-1399. https://doi.org/10.1002/eqe.907
  9. Lee, S., Parka, E., Mina, K. and Park, J. (2007), "Real-time substructuring technique for the shaking table test of upper substructures", Eng. Struct., 29(9), 2219-2232. https://doi.org/10.1016/j.engstruct.2006.11.013
  10. Nakashima, M., Kato, H. and Takaoka, E. (1992), "Development of real-time pseudo dynamic testing", Earthq. Eng. Struct. D., 21(1), 79-92. https://doi.org/10.1002/eqe.4290210106
  11. Nakata, N. (2010), "Acceleration tracking control for earthquake simulators", Eng. Struct., 32(8), 2229-2236. https://doi.org/10.1016/j.engstruct.2010.03.025
  12. Nakata, N. (2012), "A multi-purpose earthquake simulator and a flexible development platform for actuator controller design", J. Vib. Control, 18(10), 1552-1560. https://doi.org/10.1177/1077546311421946
  13. Nakata, N. and Stehman, M. (2012), "Substructure shake table test method using a controlled mass:formulation and numerical simulation", Earthq. Eng. Struct. D., 41(14), 1977-1988. https://doi.org/10.1002/eqe.2169
  14. Nakata, N. and Stehman, M. (2014), "Substructure shake table testing of 10-story RTHS structure", Network for Earthquake Engineering Simulation (NEES)(distributor). Dataset. DOI: 10.4231/D3ST7DX1R.
  15. Neild, S.A., Stoten, D.P., Drury, D. and Wagg, D.J. (2005), "Control issues relating to real-time substructuring experiments using a shaking table", Earthq. Eng. Struct. D., 34(9), 1171-1192. https://doi.org/10.1002/eqe.473
  16. Pan, P., Nakashima, M. and Tomofuji, H. (2005), "Online test using displacement-force mixed control", Earthq. Eng. Struct. D., 34(8), 869-888. https://doi.org/10.1002/eqe.457
  17. Phillips, B.M. and Spencer, B.F. (2011), "Model-based feedforward-feedback actuator control for real-time hybrid simulation", J. Struct. Eng. - ASCE, 139, 1205-1214.
  18. Shao, X., Reinhorn, A.M. and Sivaselvan, M.V. (2011), "Real-time hybrid simulation using shake tables and dynamic actuators", J. Struct. Eng. -ASCE, 137(7), 748-760. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000314
  19. Spencer, B. and Yang, G. (1998), "Earthquake simulator control by transfer function iteration", Proceedings of the 12th ASCE Engineering Mechanics Conference, San Diego, USA.
  20. Stehman, M. and Nakata, N. (2012), "Direct acceleration feedback control of shake tables with force stabilization", J. Earthq. Eng., 17(5), 736-749.
  21. Stoten, D. P. and Gomez, E. (2001), "Adaptive control of shaking tables using the minimal control synthesis algorithm", Philos. T. R. Soc. A, 359(1786), 1697-1723. https://doi.org/10.1098/rsta.2001.0862
  22. Twitchell, B. and Symans, M. (2003), "Analytical modeling, system identification, and tracking performance of uniaxial seismic simulators", J. Eng. Mech. - ASCE, 129(12), 1485-1488. https://doi.org/10.1061/(ASCE)0733-9399(2003)129:12(1485)
  23. Zapateiro, M,. Karimi, H.R., Luo, N. and Spencer, B.F. (2010), "Real-time hybrid testing of semi active control strategies for vibration reduction in a structure with MR damper", Struct. Control Health Monit., 17(4), 427-451.

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