Abstract
Wind-flow pattern over embankments involves an overexposure of the rolling stock travelling on them to wind loads. Windbreaks are a common solution for changing the flow characteristic in order to decrease unwanted effects induced by the presence of cross-wind. The shelter effectiveness of a set of windbreaks placed over a railway twin-track embankment is experimentally analysed. A set of two-dimensional wind tunnel tests are undertaken and results corresponding to pressure tap measurements over a section of a typical high-speed train are herein presented. The results indicate that even small-height windbreaks provide sheltering effects to the vehicles. Also, eaves located at the windbreak tips seem to improve their sheltering effect.
Highlights
Wind-flow pattern over embankments involves an overexposure of the rolling stock travelling on them to wind loads
The wind-flow pattern on railway embankments represents a good example of this problem, as it could significantly increase the wind loads on rolling stocks and, the risk of overturning [12,13,14,15,16,17]
Taking into account the work by Kim et al [18] it can be noted that changes on the wind-flow pattern due to artificial structures erected on the terrain of a specific location can produce higher wind loads, and temperature variations that could lead to negative effects on crop yields
Summary
Taking into account the work by Kim et al [18] it can be noted that changes on the wind-flow pattern due to artificial structures erected on the terrain of a specific location can produce higher wind loads, and temperature variations that could lead to negative effects on crop yields. These authors clearly state that “highway embankments influence the lower currents at the bottom of a slope” and “there have not been sufficient studies carried out on airflow near an artificial structure such as a highway embankment.”
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