Glare Effect Analysis and Glare-resistance Strategy of Parallelly Arranged Highway and Railway in Close Range
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1.College of Civil Engineering, Tongji University, Shanghai 200092, China;2.College of Transportation Engineering, Tongji University, Shanghai 201804, China

Clc Number:

U491.5+3;U447;U24

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    Abstract:

    According to the contrast principle of ambient light intensity for disability glare, a process of disability glare analysis based on three-dimensional spatial relationship model is proposed. Taking same-layer arranged highway and railway on the lower deck of a cable-stayed truss bridge as the engineering background, a case study is carried out. When no glare-resistance measures are taken for parallelly arranged highway and railway in close range, the glare effect produced by headlamps of railway train is serious, which is far beyond the threshold requirements of the relevant codes. Finally, an assemblable and three-dimensional glare-resistance strategy is proposed, and a detailed glare-resistance scheme is given in the case study. The results show that the glare-resistance strategy proposed can effectively reduce the glare effect of railway train headlamps to the drivers on highway.

    Fig.1 Flow chart of disablity glare analysis
    Fig.2 Cross section layout of truss bridge with same-layer arranged highway and railway (unit: mm)
    Fig.3 Basic light field model
    Fig.4 Disability glare simulation in dynamic operation
    Fig.5 Schematic diagram of simulation conditions
    Fig.6 Relationship between Ti and relative distance of railway and vehicles without glare-resistance measures
    Fig.7 Glare-resistance measures
    Fig.8 Relationship between Ti and the position of railway lamps under the most unfavorable condition with glare-resistance measures
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CHEN Airong, CAO Zhe, MA Rujin, CUI Chuanjie, TU Huizhao. Glare Effect Analysis and Glare-resistance Strategy of Parallelly Arranged Highway and Railway in Close Range[J].同济大学学报(自然科学版),2021,49(2):211~217

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History
  • Received:April 24,2020
  • Online: March 18,2021
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