Sensitivity Analysis of Barriers Test Parameters Based on Deformation Index

Abstract

7(HB) grade combined bridge barriers was taken as the analysis object, and the simulation collision analysis model was established. After full-scale impact test with real vehicle and energy balance analysis method were used to verify the effectiveness of the model, the sensitivity level of the maximum dynamic lateral deflection of highway barriers to the collision test parameters was quantitatively analyzed by single factor sensitivity analysis technique. The results show that the finite element simulation is consistent with the full-scale impact test with real vehicle results, and the energy curve is reasonable, which verifies the reliability of the computer simulation. The sensitivity coefficients of the maximum dynamic lateral deflection index of highway barriers to vehicle mass, impact velocity and impact angle are 0.625, 1.64 and 1.635, respectively. Impact velocity and impact angle are relatively sensitive factors affecting the maximum dynamic lateral deflection of highway barriers. The research results can provide reference for the fault tolerance of test parameters in formulating standard for safety performance evaluation of highway barriers.