Analysis of rail-bridge interaction of high-speed railway suspension bridge under near-fault pulse-type earthquakes

Abstract Due to the limitations of railway route selection, some high-speed railways are inevitably built near or across fault zones. To study distribution rail-bridge interaction under different load history states suspension bridges three types near-fault pulse-type earthquakes, this paper takes China's longest bridge—Wufengshan Yangtze River Bridge as background and establishes a spatial model bridge. The results show that: constant state, additional force earthquakes generally consistent, produce more significant responses than non-pulse-type with fling-step pulse being largest, it is advised specifically consider influence in calculation. Under initial condition main beam temperature loading history, all forces increase significantly, particularly affecting steel rail system. value earthquake state bridge when train deflection loaded from tower mid-span unfavorable. effect braking will weaken history. indicate an important factor influencing which needs be considered future seismic design.