高速铁路桥上无缝线路制动附加力研究

Study on Additional Brake Force of Continuously Welded Rail on High-speed Railway Bridge

制动荷载是高速铁路桥梁的重要荷载,但高速列车在双线高速铁路桥梁上单向或双线对向制动时,制动荷载并不具有对称性,而双线高速铁路整孔箱形梁具有很强的空间性,平面力学模型不能很好反映上述工况,有着很大的局限性。本文在吸收专家研究成果的基础上,建立了梁轨相互作用三维有限元空间力学模型,并用该模型对高速列车在桥上不同制动工况下引起的制动附加力进行了较详细的研究。

The brake load is an important load of high-speed railway bridge.The brake load is not symmetric when a high-speed train brakes on the bridge or two trains brake on the bridge in the opposite direction.While the box-girder of double-line high-speed railway bridges is of strong spatial mechanics characteristics,the plane mechanics calculation model,with lots of limitations,cannot reflect these conditions effectively.Based on the previous study,a three dimension FEM space mechanics model is established to simulate the interaction between beam and rail;and a more detailed study is made by this model on the additional braking force induced by high-speed train under different working condition.