Open Access

ARTICLE

Rotational Friction Damper’s Performance for Controlling Seismic Response of High Speed Railway Bridge-Track System

Wei Guo^1,2, Chen Zeng^1,2, Hongye Gou^3,*, Yao Hu^1,2, Hengchao Xu⁴, Longlong Guo^1,2

1 School of Civil Engineering, Central South University, Changsha, 410075, China.
2 National Engineering Laboratory for High Speed Railway Construction, Changsha, 410075, China.
3 School of Civil Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
4 Department of Civil Engineering, the University of British Columbia, Vancouver V6T 1Z4, Canada.

*Corresponding Author: Hongye Gou. Email: .

(This article belongs to this Special Issue: Advances in OpenSees Applications to Civil Engineering)

Computer Modeling in Engineering & Sciences 2019, 120(3), 491-515. https://doi.org/10.32604/cmes.2019.06162

Abstract

CRTS-II slab ballastless track on bridge is a unique system in China high speed railway. The application of longitudinal continuous track system has obviously changed dynamic characteristics of bridge structure. The bridge system and CRTS-II track system form a complex nonlinear system. To investigate the seismic response of high speed railway (HSR) simply supported bridge-track system, nonlinear models of three-span simply supported bridge with piers of different height and CRTS-II slab ballastless track system are established. By seismic analysis, it is found that shear alveolar in CRTS-II track system is more prone to be damaged than bridge components, such as piers, girders and bearings. The result shows that the inconsistent displacement of bridge girders is the main cause of the CRTS-II track system’s damage. Then the rotational friction damper (RFD) is adopted, which utilizes the device’s rotation and friction to dissipate seismic energy. The hysteretic behavior of RFD is studied by numerical and experimental methods. Results prove that RFD can provide good hysteretic energy dissipation ability with stable performance. Furthermore, the analysis of RFD’s influence on seismic response of HSR bridge-track system shows that RFD with larger sliding force is more effective in controlling excessive inconsistent displacement where RFD is installed, though response of other bridge spans could slightly deteriorated.

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