Wang Jingbo, Xia Hongxiang, Wang Shijie
College of Civil and Architectural Engineering, Heilongjiang Institute of Technology, Harbin 150050, China.
School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China.
Biomimetics (Basel). 2025 Jun 1;10(6):355. doi: 10.3390/biomimetics10060355.
In recent years, frequent vehicle-bridge pier collision accidents have posed a serious threat to people's economic and life security. In order to avert the impairment of reinforced concrete bridge piers (RCBPs) under the impact of vehicles, three kinds of Mg-Al alloy AlSi10Mg anti-collision structures designed by selective laser melting (SLM) printing were tested by the numerical simulation method in this study: an ultra-high performance concrete (UHPC) anti-collision structure, a bio-inspired honeycomb column thin-walled structure (BHTS) buffer interlayer, and a UHPC-BHTS composite structure were used to reduce the damage degree of RCBPs caused by vehicle impact. In accordance with the prototype configuration of the pier, a scaled model with a scale ratio of 1:10 was fabricated. Three anti-collision structures were installed on the reinforced concrete (RC) column specimens for the steel ball impact test. The impact simulation under low-energy and high-energy input was carried out successively, and the protective effect of the three anti-collision devices on the RC column was comprehensively evaluated. The outcomes demonstrate that the BHTS buffer interlayer and the UHPC-BHTS composite structure are capable of converting the shear failure of RC columns into bending failure, thereby exerting an efficacious role in safeguarding RC columns. The damage was evaluated under all impact conditions of BHTS and UHPC-BHTS composite structures, and the RC column only suffered slight damage, while the RC column without protective measures and the RC column with the UHPC anti-collision structure alone showed serious damage and collapse behavior. This approach can offer a valuable reference for anti-collision design within analogous projects.
近年来，频繁发生的车辆与桥墩碰撞事故对人们的经济和生命安全构成了严重威胁。为了避免钢筋混凝土桥墩（RCBPs）在车辆撞击下受到损伤，本研究采用数值模拟方法对三种通过选择性激光熔化（SLM）打印设计的镁铝合金AlSi10Mg防撞结构进行了测试：一种超高性能混凝土（UHPC）防撞结构、一种仿生蜂窝柱薄壁结构（BHTS）缓冲夹层以及一种UHPC-BHTS复合结构，以降低车辆撞击对RCBPs造成的损伤程度。按照桥墩的原型配置，制作了比例为1:10的缩尺模型。在钢筋混凝土（RC）柱试件上安装三种防撞结构进行钢球撞击试验。先后进行了低能量和高能量输入下的撞击模拟，综合评估了三种防撞装置对RC柱的保护效果。结果表明，BHTS缓冲夹层和UHPC-BHTS复合结构能够将RC柱的剪切破坏转化为弯曲破坏，从而在保护RC柱方面发挥有效作用。在BHTS和UHPC-BHTS复合结构的所有撞击条件下对损伤进行了评估，RC柱仅遭受轻微损伤，而没有防护措施的RC柱和仅采用UHPC防撞结构的RC柱则出现了严重损伤和倒塌现象。该方法可为类似工程中的防撞设计提供有价值的参考。
