A Simplified Design Method for Ballastless Track Seamless Line of Extra Large Railway Bridge

Abstract

The invention discloses a simplified design method for a ballastless track seamless track of a super-large railway bridge. The steps of the method include using ANSYS software to simulate S1 the seamless track structure on a super-large span bridge; establishing a ballastless track of a super-large railway bridge The vertical, horizontal, and vertical spatial coupling static model of the track seamless line, the modeling objects include rails, fasteners, track plates, elastic rubber cushions, limit bosses, bridges and piers S2; the static coupling static model Mechanical Analysis S3. On the basis of simplifying the design method, the technical solution of the present invention can accurately and effectively analyze the static force of the railway seamless line-ballastless track-ultra-large span bridge system, fully consider the beam-rail interaction relationship, and try to follow the actual situation The state completes the modeling of the track structure. On the premise of ensuring the model is meticulous, complete and accurate, the calculation model is simplified. Compared with the traditional modeling method, the design has obvious improvement.

Description

technical field [0001] The invention relates to the field of railway engineering design, in particular to a simplified design method for a ballastless track seamless track of a super-large railway bridge. Background technique [0002] With the development of urban rail transit and the limitation of space resources, the need for road and railway dual-use bridges was gradually raised during the design process. Therefore, when the railway bridge crosses a large river, not only the span of the bridge is required to be large enough, but also the bridge deck is required to be wide enough, that is, there have been extra-long-span bridges, such as the Dashengguan Yangtze River Bridge in Nanjing, and the extra-large span across the Dongping Waterway in Nanhai District, Foshan City. bridge etc. [0003] Whether it is a high-speed railway or an urban rail transit line, in the design process of a super-large bridge, it is necessary to check the strength and stability of the seamless li...

AI Technical Summary

Problems solved by technology

However, when the span is particularly large and the bridge deck is particularly wide, because some detailed structures of the track system (such as limiting bosses) are too small compared with the width of the bridge deck, although the simulation results using 3D solid elements are relatively accurate, However, there are too many units in the model structure, which leads to the calculation model being too large and the calculation speed too slow, which is not conducive to fast detection and calculation.

If the two-dimensional calculation model is used, although the number of elements in the model is greatly reduced and the calculation speed is greatly accelerated, it is difficult to reflect the interaction between beams and rails well due to the simplification of the two-dimensional model, so the calculation results are consistent with actual difference

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