| Budget Amount *help |
¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Outline of Final Research Achievements |
The vehicle model including out-of-plane and in-plane motion along with effect of curved line with specific radius, camber angle and longitudinal grade is developed. The vehicle stability is evaluated by the rollover and sideslip stability. Numerical simulations were conducted using a highway junction consisting of four curved sections and two straight sections. Effects of curved bridge radii, level of earthquake, vehicle velocity and driver reaction on the vehicle stability were evaluated. It was found that vehicle moving on a curved bridge during large earthquakes has a larger possibility for rollover and sideslip stability than vehicle moving on a straight section for the same driving velocity and level of earthquake. Reduction of normal forces on vehicle’s wheels associated with curved bridge effect and steering angle, effect of road camber at the curved section all contributed to the higher risk of instability in addition to earthquake-induced acceleration of bridge deck
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