Simplified research on pier of simply-supported long bridge subjected to braking force

Through monolithic analysis on track and bridge structure, the author finds bridge length range and working features of simply-supported long bridge´s piers subjected to braking force. According to mechanical features, the simplified calculation model is established. By dynamical analysis and calculation, the dynamical coefficient and displacement response curve at top of pier are gained. The author deduces the ratio of braking force born by long bridge´s mid substructure to braking force on track surface in a girder span. The author also deduces variable curves of bridge length subjected to braking force.