使用生物灵感的蜂柱薄壁结构 (BHTS) 改善混凝土柱的抗碰撞性能
Jingbo Wang1, Hongxiang Xia2,3, Shijie Wang1,4
1College of Civil and Architectural Engineering, Heilongjiang Institute of Technology, Harbin 150050, China.
Biomimetics (Basel, Switzerland)
|June 25, 2025
概括
车辆与桥梁的碰撞威胁着安全. 这项研究测试了钢筋混凝土桥梁支柱 (RCBPs) 的三种防撞结构,发现生物灵感的蜂柱薄壁结构 (BHTS) 和复合结构有效地保护了支柱免受冲击损坏.
科学领域:
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
背景情况:
- 车辆与桥梁码头的碰撞是经常发生的危险,造成了严重的经济和安全问题.
- 钢筋混凝土桥梁支柱 (RCBPs) 容易受到车辆碰撞造成的冲击损伤.
- 需要新的抗碰撞结构来减轻桥梁支柱的损坏.
研究的目的:
- 评估三种新型抗碰撞结构在保护RCBPs免受车辆撞击方面的有效性.
- 为了比较超高性能混凝土 (UHPC) 结构,生物灵感蜂巢柱薄壁结构 (BHTS) 和复合结构的保护性能.
- 评估低能和高能影响对受保护和不受保护的RCBPs的影响.
主要方法:
- 进行了数值模拟和缩放物理冲击测试 (1:10尺度).
- 通过选择性激光化 (SLM) 设计和测试了三种由Mg-Al合金AlSi10Mg制成的防撞结构.
- 钢球撞击测试是在带有和没有保护结构的钢筋混凝土 (RC) 柱标本上进行的.
主要成果:
- BHTS缓冲区间层和UHPC-BHTS复合结构有效地将剪切故障转化为RC柱中的曲故障.
- 在所有冲击条件下,由BHTS和UHPC-BHTS结构保护的RC柱只受到了轻微的损坏.
- 没有保护的RC柱子和那些只有UHPC结构的柱子出现了严重的损坏和崩.
结论:
- BHTS缓冲区间层和UHPC-BHTS复合结构为RCBPs提供了对车辆冲击的显著保护.
- 这些先进的结构可以防止灾难性的故障,并最大限度地减少对桥梁支柱的损坏.
- 这些发现为设计桥梁和类似结构的有效防撞系统提供了宝贵的参考.
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