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裸体和CFRP改装的多柱柱在火灾后合车辆碰撞和空气爆炸下作出反应
Qusai A Alomari1, Daniel G Linzell2, Mubarak F Abu Zouriq2
1Midwest Roadside Safety Facility, University of Nebraska-Lincoln, Lincoln, NE 68583, USA.
Materials (Basel, Switzerland)
|April 24, 2025
概括
暴露于火灾,车辆碰撞和空气爆炸的桥梁柱是脆弱的. 这项研究使用有限元模型来分析码头反应,并测试碳纤维增强聚合物 (CFRPs) 的改装,提高结构安全.
科学领域:
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
- 抗灾能力 抗灾能力 抗灾能力
背景情况:
- 火灾,碰撞和空气爆炸等灾难性事件对桥梁基础设施构成重大风险.
- 有限的研究存在于桥梁结构元素在结合极端需求下的行为.
- 了解桥梁对多重危险场景的弹性对于开发有效的改装和设计策略至关重要.
研究的目的:
- 为了研究多柱桥梁的结构行为,这些桥梁受到火灾后的条件,中型卡车碰撞和随后的空气爆炸的影响.
- 根据损坏,故障模式和永久变形来量化和评估码头的响应.
- 评估碳纤维增强聚合物 (CFRP) 作为改装技术减轻损坏的有效性.
主要方法:
- 在LS-DYNA软件中使用了先前验证的有限元 (FE) 模型.
- 在火灾,碰撞和空气爆炸后的联合负载下模拟的多柱柱 (两,三和四柱配置).
- 分析了损坏传播,故障机制和永久变形,并评估了使用CFRP的改装.
主要成果:
- 在连续的火灾,碰撞和空气爆炸负荷下,量化了桥梁的结构反应和故障模式.
- 确定了关键损伤区域和变形特征.
- 证明了CFRP改装在减轻这些危险组合的不利影响方面的潜力.
结论:
- 该研究提供了有价值的见解,了解在多种危险场景下桥梁支柱的性能.
- 调查结果可以为开发改进的设计建议和改进的装备技术提供信息,以提高桥梁的安全性和弹性.
- 碳纤维复合材料的改装显示出改善桥梁支柱的结构完整性的承诺,这些支柱受到火灾,冲击和爆炸负荷的影响.
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