Journal of Jilin University(Engineering and Technology Edition) ›› 2025, Vol. 55 ›› Issue (8): 2669-2680.doi: 10.13229/j.cnki.jdxbgxb.20240069

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Collision prevention performance of outsourced U-shaped steel concrete composite guardrail based on reasonable energy allocation

Chang-ru MU1(),Liang XU1,Guo-zhu CHENG2   

  1. 1.School of Civil Engineering，Changchun Institute of Technology，Changchun 130012，China
    2.School of Civil Engineering and Transportation，Northeast Forestry University，Harbin 150040，China
  • Received:2024-01-19 Online:2025-08-01 Published:2025-11-14

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Abstract:

In view of the poor energy absorption and buffering capacity of existing concrete rigid guardrails， a new type of composite guardrail with U-shaped steel and concrete encased by foam aluminum is proposed. Using ABAQUS to establish a guardrail vehicle collision coupling system， simulate the collision process of a 49 t heavy-duty truck with a guardrail， and analyze the guiding function， buffering function， and energy absorption function of the guardrail. The results of finite element analysis show that the ultimate strength of the new composite guardrail with wrapped U-shaped steel and concrete assembled with foam aluminum is significantly improved compared with the existing ordinary concrete guardrail. At the same time， during the collision of the truck with the guardrail， the loaded truck did not cross the guardrail， and the new combination guardrail has good guidance performance； the lateral acceleration and longitudinal acceleration at the driver's position are both less than 200 m/s2； the protection energy of the new composite guardrail is 431 kJ， and the impact efficiency is 91.25%. The new composite guardrail structure of wrapped U-shaped steel concrete with foam aluminum has a good energy absorption and cushioning effect， which can reduce the degree of injury to passengers， has a good anti-collision performance， can effectively improve the safety of riding， and can provide a reference for the energy absorption design of concrete guardrails.

Key words: engineering of communication and transportation system, outsourcing U-shaped steel-concrete guardrail, collision simulation, collision resistance performance, energy absorption

CLC Number: 

  • U417.1

Fig.1

Existing concrete guardrail collision system"

Fig.2

Collision cloud of existing concrete guardrail"

Fig.3

Structure diagram of new combined guardrail （mm）"

Table 1

Mechanical behavior of concrete under compression"

弹性模量泊松比压缩力学行为压缩损伤
31 0000.2拉伸应力/MPa

非弹性

应变

拉伸

损伤

非弹性

应变

1.30E+01000
2.15E+018.30E-043.06E-018.30E-04
1.88E+016.81E-034.90E-016.81E-03
1.51E+012.75E-036.13E-012.75E-03
1.23E+013.70E-036.93E-013.70E-03
1.03E+014.62E-037.48E-014.62E-03
8.83E+005.52E-037.87E-015.52E-03
7.72E+006.40E-038.17E-016.40E-03
6.17E+008.15E-038.57E-018.15E-03
3.50E+001.49E-029.27E-011.49E-02

Table 2

Tensile mechanical behavior of concrete"

弹性模量泊松比拉伸力学行为拉伸损伤
31 0000.2

拉伸应力

/MPa

开裂

应变

拉伸

损伤

开裂

应变

2.9000
1.94E+006.62E-053.81E-016.62E-05
1.30E+001.23E-046.17E-011.23E-04
8.73E-011.73E-047.63E-011.73E-04
5.86E-012.20E-048.53E-012.20E-04
3.92E-012.65E-049.09E-012.65E-04
2.63E-013.08E-049.44E-013.08E-04
1.76E-013.51E-049.65E-013.51E-04
1.18E-013.94E-049.79E-013.94E-04
7.92E-024.38E-049.87E-014.38E-04
5.31E-024.82E-049.92E-014.82E-04

Fig.4

Steel ideal elastic-plastic model"

Table 3

Steel material properties"

弹性模量/Mpa泊松比屈服应力塑性应变
210 0000.33450.0
3500.1

Fig.5

Finite element model of components"

Fig.6

Yield line analysis method"

Fig.7

Guardrail static loading diagram"

Fig.8

Cloud image of guardrail damage"

Fig.9

Dynamic collision diagram of guardrail"

Fig.10

Dynamic loading damage cloud diagram of guardrail （mm）"

Fig.11

Vehicle model"

Fig.12

New combined guardrail model"

Fig.13

Vehicle guardrail collision system"

Fig.14

Mathematical model of vehicle-guardrail collision"

Fig.15

The lateral collision force history curve of the new composite guardrail"

Fig.16

Energy conversion process"

Fig.17

Stress cloud diagram of stud （MPa）"

Fig.18

Crash force history curve of heavy truck"

Fig.19

Collision trajectory of heavy truck"

Fig.20

Trajectory diagram of heavy trucks"

Fig.21

Displacement cloud diagram of anti-collision closed-cell aluminum foam buffer plate （mm）"

Fig.22

Collision acceleration history curve of heavy truck"

Fig.23

Absorption energy distribution curve"

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