Optimization of Barriers Structure Design Based on LS-DYNA Collision Analysis

Abstract

In order to get barriers whose safety performance and landscape design were suited for double-deck viaduct of a highway and conformed to standard specification, barriers structure needed to be optimized. LS-DYNA finite element program was used for simulation analysis, and structural comparison was carried out according to the redirective performance and buffering performance of different forms of concrete slopes, by analyzing the stress and deformation, relative position relationship and working width of the upper column and beam of barriers, the structural strength, height layout and horizontal layout were optimized, and the stress optimization was carried out according to the stress situation of the foundation bolts on the collision side. The analysis results show that the improved slope makes it easier for the vehicle to return to the normal operating posture and the acceleration index is lower. The reasonable arrangement of the horizontal position of the beam can optimize the working width of barriers. The design of the rib plate on the side of the column against the collision can significantly improve the problems of high stress level and large difference of the foundation bolts.