关键词: 道路工程, 防撞性能, 升级改造, 冲击实验, 立柱

Abstract: The crashworthiness of guardrail post in old standard can not satisfy the current specification requirements in the process of expansion. From the perspective of improving the column bending and tension performance, the upgrade and reconstruction design scheme of column in old standard was put forward. In the proposed scheme, the soil underground and inside the column was removed and the reinforced concrete was filled. Through the mechanics calculation, the force characteristics of column bending and pullout were analyzed, and the reasonable depth and height of the concrete filled inside the column were also determined. Finally, the bending static load, bending quasi-dynamic load, pendulum impact test and pullout quasi-dynamic load experiment of the old specification columns, the current specification columns and the upgraded columns were carried out and compared. The research indicates that the crashworthiness of column in old specification upgraded and reconstructed by the proposed scheme can meet the design requirements of the current specification.

Key words: highway engineering, anti-collision performance, upgrade and reconstruction, impact test, column