针对现有混凝土刚性护栏吸能缓冲能力不佳、给行车安全带来危险等问题，提 出一种新型装配式防撞护栏。为验证其可行性，利用 LS-DYNA 有限元软件建立护栏 － 桥面板协同受力模型，模拟小客车和 40 t 大型货车在不同速度下与护栏的碰撞过程。数 值模拟结果表明: 碰撞过程中车辆未翻越栏杆，爬升高度和驶出角度较小，新型护栏改 善大货车的导向效果优于小客车; 驾驶员位置处横向加速度峰值明显降低，最大降低幅 度达 60. 8% ; 新型护栏受到的纵横向碰撞力峰值均得到减小，纵向力最多降低 49. 2% 。 新型护栏导向性好，具备更佳的吸能缓冲效果，能有效提高乘车安全性，可为实车碰撞 试验提供参考。

In view of the existing problems such as poor energy absorption and buffering capacity of concrete rigid guardrail and the danger to driving safety，a new type of prefabricated anti-collision guardrail was proposed． In order to verify its feasibility，the LS-DYNA finite element software was used to establish a guardrail-bridge deck cooperative force model to simulate the collision process of a small car and a 40 t large truck with the guardrail at different speeds． Numerical results show that the vehicle doesn＇t climb over the guardrail in collision process，the climb height and exit angle are small，and the guardrail improves guidance effects of large trucks better than that of small cars． The peak value of lateral acceleration at the driver＇s position is significantly reduced up to 60. 8% ． The peak values of the Longitudinal and lateral collision force received by the new guardrail are reduced and the longitudinal force component is reduced by up to 49. 2% ． So the new guardrail has great guiding functions and better energy absorption effects，which can effectively improve driving safety． The guardrail design can provide reference for the actual car crash test．