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Reasonable Transition form of Bridge-tunnel Connecting Section in Mountainous Expressway Affected by Crosswind
In order to explore a reasonable transition form of mountainous expressway in bridge-tunnel connecting section, driver's dynamic behavioural changes affected by crosswind is analysed through driving simulator. The experimental section is composed of tunnel and bridge, with different width of left shoulder. Driver's dynamic behaviour consists of two main parts: counter steering wheel angle and heart rate. The results show that the influence on driver's dynamic behaviour is greater when the car encountered crosswind at the exit of the tunnel than the crosswind suddenly disappearing at entry of incoming tunnel. As design speed is 100 kmph, the recommended value of left shoulder width is 1.5 m for tunnel exit, while 1.75 m for entrance. For the facility of design and construction, the theoretical transition form of bridge- tunnel connecting section is simplified.
Keywords
Bridge–Tunnel Connecting Section, Cross Wind, Driving Simulator, Mountainous Expressway, Transition Form.
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