钢-混组合护栏的力学模型及仿真分析

Mechanical model and simulation analysis of steel-concrete composite barrier

针对汽车与钢-混组合护栏碰撞过程中汽车和混凝土共同变形,建立汽车与钢-混组合护栏碰撞的计算模型,并用有限元通用显式程序LS-DYNA对碰撞运动进行数值仿真分析.在分析组合护栏中各组件在碰撞中的作用的基础上对组合护栏的抗撞能力进行综合评价.因钢-混组合护栏中钢结构能够在碰撞中吸收较多的能量,所以组合护栏的防撞能力得到很大的提高.仿真分析结果证明组合护栏防撞能力相对其他类型的护栏具有较大的优势.该研究为新型防撞护栏的设计提供了新的方法.

According to co-deformation of both sides collided,computational mechanics model of collision between automobile and steel-concrete composite barrier is established.Numerical simulation analysis of collision course is done using the finite element common explicit program LS-DYNA.A comprehensive evaluation about the anti-collision of the composite barrier is evaluated on the basis of the roles of the various components which are analysed in this paper.Steel structure of composite barrier can absorb more energy in collisions;so the anti-collision ability of composite barrier is greatly improved.Results of simulations show that anti-collision ability of composite barrier has greater advantages than that of other types of barriers.The study provides a new way for new crash barrier design.