Seismic response analyses of high-speed railway bridge round-ended piers using global bridge model

摘要

The non-linear failure occur in pier bottom which may cause the collapse or damage of bridge under high-level earthquake, lots of researchers have been paying more and more attention to the seismic behaviour of high-speed railway bridge piers with the development of high-speed railway. The seismic responses of high-speed railway round-ended piers are investigated in this paper. The global finite element model of the multi-span bridge simply supported bridge is set up under earthquake action, the round-ended piers are taken into account as part of whole bridge, by means of finite element software and moment-curvature relationship programme, the seismic responses of bridge piers are calculated under the different earthquake action combination, pier height and vehicle speed. Calculation results show that the seismic responses will increase with increment of speed of vehicles, pier height and seismic intensity, the elastic-plastic deformation will occur at the pier bottom under high-level earthquake action, and some measures such as lateral reinforced steel encryption should be taken into account to ensure safety.