Real-time hybrid simulation of structures equipped with viscoelastic-plastic dampers using a user-programmable computational platform
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A user-programmable computational/control platform was developed at the University of Toronto that offers real-time hybrid simulation (RTHS) capabilities. The platform was verified previously using several linear physical substructures. The study presented in this paper is focused on further validating the RTHS platform using a nonlinear viscoelastic-plastic damper that has displacement, frequency and temperature-dependent properties. The validation study includes damper component characterization tests, as well as RTHS of a series of single-degree-of-freedom (SDOF) systems equipped with viscoelastic-plastic dampers that represent different structural designs. From the component characterization tests, it was found that for a wide range of excitation frequencies and friction slip loads, the tracking errors are comparable to the errors in RTHS of linear spring systems. The hybrid SDOF results are compared to an independently validated thermalmechanical viscoelastic model to further validate the ability for the platform to test nonlinear systems. After the validation, as an application study, nonlinear SDOF hybrid tests were used to develop performance spectra to predict the response of structures equipped with damping systems that are more challenging to model analytically. The use of the experimental performance spectra is illustrated by comparing the predicted response to the hybrid test response of 2DOF systems equipped with viscoelastic-plastic dampers.
Keywordsreal-time hybrid simulation user-programmable computational/control platform supplemental dampers performance spectra
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The financial support for this study from NSERC Discovery (Grant 371627-2009) and NSERC RTI (Grant 374707-2009 EQPEQ) programs, as well as the startup funds from the University of Toronto are gratefully acknowledged. Any opinions, findings, conclusions and recommendations expressed here are those of the authors and do not necessarily reflect the views of the sponsors.
- Asai T, Chang CM, Spencer BF (2014), “Real-time Hybrid Simulation of a Smart Base-isolated Building,” Journal of Engineering Mechanics (ASCE), DOI: 10.1061/(ASCE)EM.1943-7889.0000844.Google Scholar
- Carrion JE, Spencer BF (2006), “Real-time Hybrid Testing Using Model-based Delay Compensation,” Proceeding of 4th International Conference on Earthquake Engineering, Chinese Taipei.Google Scholar
- Chen C (2007), “Development and Numerical Simulation of Hybrid Effective Force Testing Method,” Ph.D. Dissertation, Lehigh University, Bethlehem, Pa.Google Scholar
- Daniel Y, Montgomery M and Christopoulos C (2014), “Testing and Modeling of ISD-111H Viscoelastic Dampers under Wind and Earthquake Loading,” Proc. Tenth U.S. National Conference on Earthquake Engineering, Paper 595, Anchorage, Alaska.Google Scholar
- Dermitzakis SN and Mahin SA (1985), “Development of Substructuring Techniques for On-line Computer Controlled Seismic Performance Testing,” Report UBC/EERC-85/04, Earthquake Engineering Research Center, University of California, Berkeley, CA.Google Scholar
- Guo WWJ and Christopoulos C, (2016), “Experimental Characterization and P-spectra Design of Frames with Viscoelastic-Plastic Dampers,” Earthquake Eng. Struct. Dyn, DOI: 10.1002/eqe.2732.Google Scholar
- Horiuchi T, Inoue M, Konno T, Namita Y (1999), “Real-time Hybrid Experimental System with Actuator Delay Compensation and Its Application to a Piping System with Energy Absorber,” Earthquake Eng. Struct. Dyn, 28(10): 1121–1141. DOI10.1002/(SICI)1096-9845(199910)28:10<1121::AID-EQE858>3.0.CO;2-O.CrossRefGoogle Scholar
- Matsuoka T, Ohmata K, and Miyagi Z (2002), “A Study of Viscoelastic-friction Damper Using a Lever-type Displacement Magnifying Mechanism,” Journal of Society of Mechanical Engineering. 674(68): 56–62. (in Japanese)Google Scholar
- Pall AS, Marsh C and Fazio P (1980), “Friction Joints for Seismic Control of Large Panel Structures,” J. Prestressed Concrete Inst., 25(6): 38–61.Google Scholar
- Shao X, Reinhorn AM and Sivaselvan M (2006), “Realtime Dynamic Hybrid Testing Using Force-based Substructuring,” Proceeding of the Structures Congress (ASCE), Reston, Va.Google Scholar
- Shing PB, Spacone E and Stauffer E (2002), “Conceptual Design of a Fast Hybrid Test System at the University of Colorado,” Proceeding of the 7th US Conference on Earthquake Engineering, Boston, MA, USA.Google Scholar
- Somerville P, Punyamurthula S and Sun J (1997), SAC Report No. SAC/BD-97/04 Development of Ground Motion Time Histories for Phase 2 of the FEMA/SAC Steel Project, SAC Joint Venture.Google Scholar