新型装配式混凝土防撞墙拟静力有限元分析

Quasi-static Finite Element Analysis of a New Type of Fabricated Concrete Anti-collision Wall

对预制装配式防撞墙竖向的新型连接形式进行了对比分析,利用ABAQUS有限元模拟的方法,通过应力云图和位移云图比较两者的受力特点,讨论不同因素对预制装配式防撞墙承载能力和位移的影响。结果表明:在单向均布荷载作用下,所提连接节点模型的屈服破坏特点与现浇模型基本一致,随着配筋率的提高,承载力分别提高了4.8%、12.4%、20%。改变预应力钢筋的分布间距对装配式防撞墙的承载能力的提高并不显著。增加混凝土强度能够有效提高防撞墙的承载能力,但提升空间有限。

In this paper,the new connection forms of prefabricated anti-collision walls are coMPared and analyzed.The abaqus finite element simulation method is used to establish the cast-in-place anti-collision wall model and the prefabricated anti-collision wall model, first through the stress cloud map and the displacement cloud map,comparing the force characteristics of the two, then discussing the influence of different factors on the bearing capacity and displacement of the prefabricated anti-collision wall.The results show that under the one-way uniform load, the yield failure characteristics of the proposed joint model are basically the same as those of the cast-in-place model.With the increase of the reinforcement ratio, the bearing capacity increased by 4.8%, 12.4%, and 20%, respectively.Changing the distribution spacing of the prestressed steel bars does not significantly improve the load carrying capacity of the assembled anti-collision walls.Concrete strength can effectively improve the carrying capacity of the anti-collision wall, but the lifting space is limited.