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Cross-wind environment numerical simulation of connection section between tunnel and bridge(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2012年05期
Page:
52-57
Research Field:
Publishing date:

Info

Title:
Cross-wind environment numerical simulation of connection section between tunnel and bridge
Author(s):
WANG Lu;  CHEN Hong
School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
Keywords:
bridge engineering;  connection section between bridge and tunnel;  canyon wind;  wind characteristic;  numerical simulation
PACS:
U491
DOI:
-
Abstract:
For the study of cross-wind around bridge connection section influencing the wind field characteristics, three dimensional model of bridge and tunnel connection segment was established. Internationally fluid mechanics calculation software FLUENT and finite volume method for spatial discretization were adopted, and k-w turbulence model was used to numerically simulate the horizontal cross-wind characteristics at different locations over the bridge. The calculation results show that under the same wind speed condition, the smaller the valley space is, the more obvious the airflow speeds up and the smaller scope to accelerate over the bridge. When the distance between valleys is 20、30、50 m respectively, the wind speed over the bridge increases by 30.8%、29.3%、27.2% respectively,and the accelerating scope is 16、20、38 m respectively. At the same time, the wind speed is smaller at a certain range in the bridge-tunnel section but the turbulence intensity is larger. Within a certain range of the bridge, the wind speed is higher but the turbulence intensity is smaller. The results of numerical simulation provide reliable basis for the study of traffic safety and traffic comfort. 2 tabs, 8 figs, 8 refs.

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Last Update: 2012-10-30