Aiming at problems of poor performance and short service life of bridge guardrails during use, a continuous basalt fiber composite guardrail was proposed.Firstly, the collision simulation system of the proposed guardrail was established, and then the collision process of the guardrail was simulated with the nonlinear explicit dynamics software LS-DYNA.Finally, the simulation results of the proposed guardrail were compared with those of a steel guardrail.The results showed that the proposed system’s hourglass energy is less than 10% of the total energy in collision process, so the finite element simulation process has a good simulation performance; in collision process, vehicles do not have phenomena of pass over guardrail, astride it, or pass through it, so the guardrail has a good guiding performance; in collision process, the longitudinal and transverse acceleration values at the seat position are less than the standard allowable values, so the guardrail has a good buffer function for vehicles; compared to steel guardrails, the proposed guardrail can better reduce vehicle’s acceleration and absorb collision energy, so the anti-collision performance of the proposed guardrail is better than that of steel guardrail.
Key words
bridge /
BFRP /
numerical simulation /
guardrail /
acceleration /
energy absorption
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