《铁路列车荷载图式》制定研究

Development and Research of Train Load Schema

铁路列车荷载图式是铁路列车对线路工程结构静态作用的概化表达形式,主要用于铁路桥涵结构的设计。随着我国铁路运输的发展,不同类型线路的运营列车在轴重、速度、运输密度等方面具有较大差异,单一列车荷载图式难以反映新形势下的铁路运输特征。自20世纪90年代以来,我国研究制定了适用于高速铁路、城际铁路、客货共线铁路、重载铁路的列车荷载图式,形成了铁道行业标准TB/T 3466—2016《铁路列车荷载图式》。回顾我国铁路列车荷载图式的研究和发展情况,重点对各种类型荷载图式及相应动力系数的研究思路进行研讨,并提出进一步研究方向。

The train load schema is a generalized expression mode of the static effect of trains on the engineering structure of railways and is mainly used in tile structure design of railway bridges and culverts. With the development of China＇s railway transportation, great differences exist in operating trains on different types of railways in terms of axle load, speed, transport density and other aspects. Therefore, it is difficult to reflect the features of railway transportation in the new context with a single load schema. Since 1990s, China has developed the train load schemas for high-speed railways, intercity railways, mixed passenger and freight railways and heavy-haul railways, having formed the standard of the railway industry-TB/T 3466-2016 Train Load Schema. Reviewing the research and development of China＇s train load schema, this article tbcuses on the research idea of different types of load schemas and corresponding dynamic coefficient and puts forward further research orientation.