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Earthquakes and Structures
  Volume 13, Number 3, September 2017, pages 299-307
DOI: http://dx.doi.org/10.12989/eas.2017.13.3.299
 


RTS test study and numerical simulation of mechanical properties of HDR bearings
Tianbo Peng and Yicheng Wu

 
Abstract
    High Damping Rubber bearings (HDR bearings) have been used in the seismic design of bridge structures widely in China. In earthquakes, structural natural periods will be extended, seismic energy will be dissipated by this kind of bearing. Previously, cyclic loading method was used mainly for test studies on mechanical properties of HDR bearings, which cannot simulate real seismic responses. In this paper, Real-Time Substructure (RTS) test study on mechanical properties of HDR bearings was conducted and it was found that the loading rate effect was not negligible. Then the influence of peak acceleration of ground motion was studied. At last test results were compared with a numerical simulation in the OpenSees software framework with the Kikuchi model. It is found that the Kikuchi model can simulate real mechanical properties of HDR bearings in earthquakes accurately.
 
Key Words
    high damping rubber bearing; real-time substructure test; loading rate; numerical simulation
 
Address
Tianbo Peng and Yicheng Wu:
1) State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China
2) College of Civil Engineering, Tongji University, Shanghai, China
 

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