结合工程实际提出了采用现浇钢筋混凝土梁板+钢格构柱组成的组合式新型铁路便桥结构,并成功地在铁路枢纽工程中应用。着重阐述了混凝土梁板+钢格构柱组合式铁路便桥结构的动力特性分析和车桥耦合振动响应分析,并采取有针对性的增强便桥横向刚度的设计措施。组合式铁路便桥是对现有铁路便桥结构的一种补充,较好的解决了跨既有线的铁路站房建设与保证既有线安全正常运营的矛盾。 Combined with engineering practice, a new type of combined railway bridge structure with cast-in-place reinforced concrete beam plate and steel lattice column is proposed and applied successfully in the railway hub project. The dynamic characteristics analysis and the coupling vibration analysis of the bridge with concrete beam + steel lattice columns are emphatically elaborated, and the design measures to enhance the transverse stiffness of the bridge are taken. The combined railway bridge is a complement to the existing railway bridge structure, which better solves the contradiction between the railway station building across existing lines and the safe and normal operation of existing lines.