在一个简单支的钢桥上的地震冲击损伤的数值模拟
Fan Shi1, Dongsheng Wang1, Lei Tong1
1School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China.
Heliyon
|December 6, 2023
概括
在熊本地震期间,钢桥经历了意想不到的地震冲击损坏. 这项研究使用有限元分析来详细分析钢桥上的冲击效应,揭示横向冲击会造成最严重的损伤.
科学领域:
- 结构工程 结构工程
- 地震工程的工程是地震工程.
- 计算力学 计算力学 计算力学
背景情况:
- 钢桥,虽然一般具有弹性,但在熊本地震中遭受了严重的地震冲击损坏.
- 现有的桥梁冲击研究主要集中在混凝土结构上,在了解钢桥的行为方面存在差距.
- 钢制桥梁组件的复杂动态特性和不同的刚度需要特别的研究.
研究的目的:
- 在简单支钢桥上的地震冲击损伤进行详细的数值调查.
- 分析不同地震冲击方向 (纵向,横向,水平) 对钢制桥梁组件的影响.
- 提出一种基于位移的冲击识别方法,以及对横向冲击损伤的预防措施.
主要方法:
- 使用Abaqus开发一个多尺度的,三维的有限元素模型.
- 执行动态隐含分析以模拟地震事件及其影响.
- 对数值结果的分析,以在各种地震情景下量化冲击损害.
主要成果:
- 大规模和断层附近的地震活动会导致钢梁遭受重大冲击损伤.
- 纵向冲击导致钢梁末端局部轻微损伤.
- 侧向冲击导致钢梁直接,广泛和严重损坏.
- 横向的冲击,结合纵向和横向的力量,导致桥梁甲板旋转,并加剧横向损伤.
结论:
- 地震冲击对钢桥构成相当大的风险,特别是在接近断层的条件下.
- 侧向冲击是导致钢桥梁梁严重损坏的最关键因素.
- 该研究为改善钢桥的地震设计和损害评估提供了基础,包括一种新的识别方法和拟议的预防策略.
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