1. Numerical analysis on longitudinal seismic responses of high-speed railway bridges isolated by friction pendulum bearings
- Author
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Jiang Lizhong, Jianfeng Mao, Biao Wei, Haiyan Li, and Zhiwu Yu
- Subjects
seismic isolation ,lcsh:Mechanical engineering and machinery ,high-speed railway ,020101 civil engineering ,02 engineering and technology ,Track (rail transport) ,friction pendulum bearing ,0201 civil engineering ,OpenSees ,CRTS ,0203 mechanical engineering ,lcsh:TJ1-1570 ,General Materials Science ,Friction coefficient ,CRTS II slab ,business.industry ,Mechanical Engineering ,Numerical analysis ,Comparison results ,Pendulum ,simply supported bridge ,Structural engineering ,020303 mechanical engineering & transports ,Slab ,business ,Geology - Abstract
As to analyze the effects of friction pendulum bearings (FPB) on the responses of simply supported bridges on a high-speed railway under longitudinal earthquakes, a spatially integrated track-bridge model with a CRTS II slab ballastless track and FPB was established by using the OpenSEES software. The seismic responses under different ground motions were calculated and compared with those using common spherical steel bearings. The comparison results show that the combination of FPB and the CRTS II slab ballastless track is more reasonable. Namely, using FPB can effectively protect the bridge and track structures. Moreover, the rails, fasteners, CA layer and piers are perfectly protected by multi-layer isolation mechanics, induced by FPB and sliding layer, even under strong earthquakes. Finally, 0.05 is identified to be the best value for the friction coefficient of FPB under longitudinal earthquakes.
- Published
- 2018