串联简支梁上纵向连接器刚度的研究

Study on stiffness of longitudinal connector on a series of simply supported girders

串联简支梁中纵向连接器刚度的不同会直接影响到桥上无缝线路的受力。为了研究纵向连接器刚度的变化对桥上无缝线路的影响,利用ANSYS有限元计算软件建立模型,分析了刚度变化对伸缩力、挠曲力、制动力、断轨力的影响。计算结果表明,纵向连接器的使用可以明显改善桥上无缝线路的受力状况,随着刚度的增加,最大伸缩附加力会出现先增大后减小的现象,制动力作用下的梁轨快速相对位移呈减小的趋势,断轨力作用下的断缝值也会越来越小。

The stiffness differences of the longitudinal clutch in series-connected simple supported beams directly affect the force-bearing capacity of the continuously welded rail （CWR）. With the help of ANSYS finite-element software, the paper built up the model to analyse the influence of stiffness differences on expansion-constriction force, bending force, braking force and breaking force. The result indicated that the installation of longitudinal clutch will visibly improve the force bearing capacity of CWR on bridge. With the increase of stiffness, the maximum expansion-constriction additional force goes up first and comes down afterwards; while the rapid beam-rail relative displacement narrows down under the influence of braking force; and the break joint values decrease in the action of braking force.