Abstract

The most popular crash barriers made so far are made up of steel-reinforced concrete (RC), which has high flexural rigidity but poor energy absorption. Consequently, when a vehicle collides with such crash barrier, the vehicle is seriously damaged and occupants may be fatally injured due to the severe impact of the collision. Hence, in order to enhance the safety of road users, a pre-fabricated textile-reinforced concrete (TRC) crash barrier prototype is developed using glass and basalt textile as reinforcement. The experimental investigations are carried out on both glass and basalt TRC crash barrier at the laboratory level under impact load to study the level of impact and deceleration rate. The performance of TRC crash barriers are also compared with RC crash barriers of equivalent calibrated reinforcement ratio. The lesser impact force and the lower rate of deceleration and higher energy absorption characteristics were experienced during the impact test for TRC crash barriers when compared to that of conventional RC barrier. Present study indicates that the application of TRC in crash barriers can improve the safety of the occupants and reduces damages to the impacting vehicles.

摘要

迄今为止，最受欢迎的防撞护栏由钢筋混凝土 (RC) 制成，其抗弯刚度高但能量吸收能力差。因此，当车辆与这种防撞护栏发生碰撞时，车辆会受到严重损坏，并且由于碰撞的剧烈冲击，乘客可能会受到致命伤害。因此，为了提高道路使用者的安全性，使用玻璃和玄武岩织物作为增强材料，开发了一种预制纺织增强混凝土 (TRC) 防撞屏障原型。在实验室水平上对玻璃和玄武岩 TRC 防撞屏障在冲击载荷下进行了实验研究，以研究冲击水平和减速率。还将 TRC 防撞护栏的性能与等效校准加固比的 RC 防撞护栏进行了比较。与传统 RC 护栏相比，TRC 防撞护栏在冲击试验中经历了较小的冲击力和较低的减速率和较高的能量吸收特性。目前的研究表明，TRC在防撞屏障中的应用可以提高乘员的安全性并减少对碰撞车辆的损害。