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Method and system for analyzing longitudinal interaction of longitudinal connecting plate type ballastless track and bridge

A slab-type ballastless track, ballastless track technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve the longitudinal interaction without considering the interaction between steel and concrete, ballastless track concrete cracking and closing effects, It does not conform to the actual situation and other problems, so as to achieve the effect of improving the simulation accuracy.

Active Publication Date: 2016-12-14
宁波澎湃轨道科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the research on the longitudinal interaction between longitudinal slab ballastless track-bridge-bridge abutment at home and abroad does not consider the interaction between steel bars and concrete, the cracking and closing effect of ballastless track concrete, which is not in line with the actual situation.

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  • Method and system for analyzing longitudinal interaction of longitudinal connecting plate type ballastless track and bridge
  • Method and system for analyzing longitudinal interaction of longitudinal connecting plate type ballastless track and bridge
  • Method and system for analyzing longitudinal interaction of longitudinal connecting plate type ballastless track and bridge

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Embodiment 1

[0032] The embodiment of the present invention firstly discloses a method for analyzing the longitudinal interaction between the longitudinally connected slab ballastless track and the bridge, such as figure 1 shown, including:

[0033] Step S1, determining the minimum temperature of the longitudinally connected slab ballastless track on the bridge during service. The concrete realization of this step can be realized through following (1)-(5):

[0034] (1) Download the relevant meteorological data of a regional meteorological bureau from the website of the meteorological bureau, including year, month, day, average wind speed, average temperature, sunshine hours, daily minimum temperature, daily maximum temperature, total daily total radiation, etc.

[0035] (2) Drawing on the research results of the temperature field of engineering structures at home and abroad, a calculation model for the temperature field of the longitudinal slab ballastless track on the bridge is established...

Embodiment 2

[0050] In order to facilitate those skilled in the art to fully understand the technical solutions of the present invention, this embodiment further describes the foregoing embodiment 1 in detail in combination with specific scenarios.

[0051] In this embodiment, the rolling stock adopts the CRH3 high-speed train widely used on high-speed railways in my country; the track slab is a standard CRTS II track slab widely used on high-speed railways, and its concrete label is C55. The track slab is 2.55 meters wide and 0.2 meters thick. The base plate concrete is high-performance concrete for high-speed railways, the concrete grade is C30, the width is 2.95 meters, and the thickness is 0.2 meters; the longitudinal main reinforcement of the ballastless track reinforcement is 6 HRB500 fine-rolled threaded steel bars with a diameter of 20mm in the track slab and There are 58 HRB500 threaded steel bars with a diameter of 16mm in the base plate; the bridge is a 32m double-line standard box...

Embodiment 3

[0079] Corresponding to the above-mentioned embodiments 1 and 2, this embodiment discloses a longitudinal interaction analysis system between a longitudinally connected slab ballastless track and a bridge, including:

[0080] The first processing unit is used to determine the minimum temperature of the longitudinal connecting slab ballastless track on the bridge during service;

[0081] The second processing unit is used to consider the influence of the construction temperature of the ballastless track, the minimum temperature of the ballastless track during service and the shrinkage of the ballastless track concrete, and obtain the maximum equivalent temperature drop of the ballastless track during service;

[0082] The third processing unit is used to establish the initial longitudinal interaction model of the ballastless track-bridge-bridge abutment of the longitudinally connected slab. The longitudinal connection units at all pre-cracks are set as longitudinal spring units,...

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Abstract

The invention relates to railway engineering application calculation and design techniques, discloses a method and a system for analyzing the longitudinal interaction of a longitudinal connecting plate type ballastless track and a bridge, and aims to provide important support to on-bridge longitudinal connecting plate type ballastless tracks and lower foundation design in different climate environments. The method comprises the following steps: respectively establishing a longitudinal connecting plate type ballastless track-bridge temperature field calculation model and a longitudinal connecting plate type ballastless track-bridge-bridge pier longitudinal interaction model; studying the interaction of a longitudinal connecting plate type ballastless track, a bridge and a bridge pier under longitudinal loads such as the longitudinal load of a train in service, the temperature of concrete of the ballastless track and the shrinkage load of concrete, the bridge temperature load, the plate breakage load and the broken track load by using the models. The method and the system are relatively fine as a mechanical model takes the cracking and closure effects of the cracks and longitudinal interaction of reinforced steel concrete into account, and are relatively complete as a load model takes different temperature characteristics of different climate environments into account.

Description

technical field [0001] The invention relates to railway engineering application calculation and design technology, in particular to a longitudinal interaction analysis method and system of a longitudinally connected slab ballastless track and a bridge. Background technique [0002] Longitudinal slab ballastless track on the bridge is a main type of ballastless track structure in my country's high-speed railway, and it is widely used in China's high-speed railway. Compared with other types of ballastless track structures on bridges, it has the advantages of improving the smoothness of high-speed trains passing through the line, actively controlling the location of cracks, and greatly reducing the longitudinal force of rails and bridge piers. [0003] Although the longitudinally connected slab ballastless track on the bridge has various advantages, since the steel bar of the longitudinally connected slab ballastless track on the bridge is continuous in the longitudinal directi...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 徐庆元张泽李奕金娄平宋旭明周小林陈伟张向民闫斌
Owner 宁波澎湃轨道科技有限公司
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