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Real-time hybrid simulation of structures equipped with viscoelastic-plastic dampers using a user-programmable computational platform

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Earthquake Engineering and Engineering Vibration 2017年第4期16卷 693-711页

作者： Jack Wen Wei Guo Ali Ashasi-Sorkhabi Oya Mercan Constantin Christopoulos Kinetica 1235 Bay St.Suite 1004ONM5R 3K4 Department of Civil Engineering University of Waterloo200 University Avenue WWaterlooONN2L 3G1Canada Department of Civil Engineering University of Toronto35 St.George StreetTorontoONM5S 1A4Canada

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 thermal- mechanical 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.

关键词： real-time hybrid simulation user-programmable computational/control platform supplemental dampers performance spectra

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