Anti-collision performance of FRP-concrete combined guardrail under heavy vehicle impact

doi:10.11835/j.issn.1000.582X.2024.04.005

Home > Archive>Volume 47, Issue 4, 2024 >51-63. DOI:10.11835/j.issn.1000.582X.2024.04.005

Anti-collision performance of FRP-concrete combined guardrail under heavy vehicle impact
DOI:
                        10.11835/j.issn.1000.582X.2024.04.005
                    
CSTR:
                        [cstr]
                    
Author:
                        ZHENG Zhi1,2ZHENG Zhi
School of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China;National Key Laboratory of Structural Dynamics of Bridge Engineering, China Merchants Chongqing Communications Technology Research and Design Institute Co., Ltd., Chongqing 400067, P. R. China
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YANG Bo1YANG Bo
School of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China
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YUAN Pei2YUAN Pei
National Key Laboratory of Structural Dynamics of Bridge Engineering, China Merchants Chongqing Communications Technology Research and Design Institute Co., Ltd., Chongqing 400067, P. R. China
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GENG Bo2GENG Bo
National Key Laboratory of Structural Dynamics of Bridge Engineering, China Merchants Chongqing Communications Technology Research and Design Institute Co., Ltd., Chongqing 400067, P. R. China
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Affiliation:1.School of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China;2.National Key Laboratory of Structural Dynamics of Bridge Engineering, China Merchants Chongqing Communications Technology Research and Design Institute Co., Ltd., Chongqing 400067, P. R. China
Clc Number:U417.1+2
Fund Project:Supported by Natural Science Foundation of Chongqing（CSTB2022NSCQ-MSX1658）, and the Science and Technology plan project of Guizhou Province (Qiankehe Support （2022）026).

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Abstract:

To improve the protective capabilities of existing low-grade concrete guardrails against heavy vehicles,three types of composite protective plates designed for direct installation on the surface of concrete guardrails were developed. Refined finite element (FE) models of truck-guardrails were established, and the reliability of these models was verified by comparison with crash test results. Six evaluation indexes, including impact force,collision angle variations,vehicle trajectory, height variations of the carriage box tail,vehicle dynamic extroversion value and camber angle, were considered. The anti-collision performance of the three schemes was compared and analyzed. The results indicate that all three kinds of guardrails effectively guide vehicles to turn smoothly during the integral truck impacts. Scheme 1, without hindrance, demonstrates superior performance in key indices compared to the others. Under towed truck impacts, scheme 1 exhibits excellent guiding and blocking capabilities, with an exit angle of only 0.75°.The protection energy of the combined guardrail reaches 650 kJ,providing a protection capacity 4 times greater than the existing low-grade guardrail.

Key words:combined guardrail;crash simulation;anti-collision ability;composite material

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郑植,杨波,袁佩,耿波.FRP-混凝土组合式护栏防护重型车辆撞击的能力[J].重庆大学学报,2024,47(4):51~63

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Received:June 15,2023
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Online: May 06,2024
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