Ms. Ning Jia Profile

Ning Jia

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Publications (2)

Proceedings Article | 14 February 2024 Paper

Simulation analysis of multi angle collision of super high-speed car on bridge guardrail

Gang Guo, Jian Lu, Guangdong Wang, Yao Yao, Ning Jia

Proceedings Volume 13018, 130182J (2024) https://doi.org/10.1117/12.3024188

KEYWORDS: Bridges, Roads, Numerical simulations, Design, Safety

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Proceedings Article | 7 September 2023 Paper

Analysis of safety performance of guardrail after paving on expressway pavement

Yonghui Zuo, Jian Lu, Ning Jia

Proceedings Volume 12790, 127903Y (2023) https://doi.org/10.1117/12.2689525

KEYWORDS: Safety, Roads, Numerical simulations, Engineering, Transportation

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The anti-slip performance of the road surface is closely related to the technical condition of the road surface. Long-term operation of the highway road surface will cause different damage situations, resulting in varying degrees of reduction in the anti-slip performance of the road surface, which has a serious impact on operational safety. In response to the impact of variable thickness paving on the protective capacity of guardrails in emergency lanes, numerical simulation analysis was used to calculate the process of a vehicle collision with guardrails. The deformation of guardrails and related indicators of vehicle inclination during vehicle collision was obtained. The results show that: (1) Under both overlay and non-overlay conditions, the driving trajectory of the vehicle after colliding with the guardrail is within the range of the guided exit frame. The vehicle has not broken through the guardrail, and the guardrail provides effective protection for the vehicle. The guidance and blocking functions of the guardrail meet the requirements. (2) When a vehicle collides with a guardrail structure under two conditions, the maximum lateral dynamic deformation value D and the maximum lateral dynamic extension value W of the guardrail structure themselves are relatively close, with a difference of no more than 5cm. The deformation of the guardrail is not significantly different. (3) For the vehicle camber index, under the conditions of overlay and no overlay, the camber value when the vehicle collides with the guardrail is relatively close, with a difference of about 0.9 cm between the two. The camber situation when the vehicle collides with the guardrail under the two conditions is relatively similar, and the difference in guardrail protection ability is not significant. (4) Based on the comprehensive analysis of the deformation index of the guardrail structure and the vehicle inclination index, when the height difference of the road surface is 4 cm within the 3 m range of the emergency lane, the deformation index of the guardrail and the vehicle inclination index are relatively close to those under the condition of no overlay. The variable thickness overlay does not have a significant adverse effect on the actual protective ability of the guardrail, and the safety performance of the guardrail structure meets the requirements.

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