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关于有限元模拟和B750HL桥梁屏障桥梁B750HL全尺寸车辆碰撞测试的研究
1Zhejiang Institute of Communications Co., Ltd., Hangzhou, 310030, China.
Scientific reports
|July 26, 2024
概括
本研究介绍了一种新的B750HL钢制桥梁屏障,改造现有的51厘米混凝土底座,以满足SS级保护标准. 创新的设计提高了安全性,降低了桥梁甲板负载,并降低了成本,通过模拟和碰撞测试进行验证.
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
- 运输安全运输安全
背景情况:
- 现有的51厘米混凝土桥梁障碍物没有足够的保护,无法满足当前的安全标准.
- 需要改装策略来提高低调桥梁障碍的性能.
- 在桥梁障碍物中使用B750HL钢等先进材料是未被充分探索的.
研究的目的:
- 开发和验证一种升级现有51厘米混凝土桥梁障碍物的方法,以满足SS级保护.
- 为了研究使用B750HL钢的新型桥梁屏障设计的结构完整性和性能.
- 确认有限元模拟在预测桥梁障碍物全面碰撞测试结果中的可靠性.
主要方法:
- 研究了现有障碍的结构维度和具体强度.
- 使用有限元 (FE) 模拟分析来评估屏障性能.
- 使用收益率线理论设计和计算了一种改进的屏障的承载能力.
- 对各种车型 (小型汽车,公共汽车,拖拉机-货车拖车) 进行了全面的车辆碰撞测试.
主要成果:
- 新的B750HL钢桥屏障设计成功满足了SS级保护要求.
- 改进的设计将桥梁甲板的额外负载降至最低,同时提高安全性.
- FE模拟准确预测了全面撞击测试的结果,证明了它们的可靠性.
- 与传统升级相比,B750HL桥梁屏障可以降低材料和工程成本.
结论:
- B750HL桥梁屏障是改造现有的低高度混凝土屏障以满足高安全标准的有效解决方案.
- FE模拟是评估桥梁障碍安全性能的可靠工具,可能减少对广泛物理测试的需求.
- 这项研究为混合桥梁障碍物提供了一种经过验证的设计方案,适用于51厘米或更高的现有结构.
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