在非常低的高度侧冲击负载下的圆形混凝土填充钢管柱的测试和偏斜计算方法
Jiayu Liang1, Yanhui Liu2, Yichao Zhao3
1School of Civil Engineering Southwest, Jiaotong University, Chengdu, 610031, People's Republic of China.
Scientific reports
|November 13, 2023
概括
这项研究在侧面冲击下测试了圆形混凝土填充钢管柱 (CFST). CFST柱的冲击阻力最初增加,然后随着轴承负载的增加而下降.
科学领域:
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
背景情况:
- 圆形混凝土填充钢管柱 (CFST) 是关键的结构元素,特别是在高速铁路基础设施.
- 了解它们在动态侧冲击负载下的行为对于安全和设计优化至关重要.
研究的目的:
- 实验性地研究圆形CFST柱的侧面冲击反应.
- 开发CFST柱在冲击负荷下偏移的预测模型.
主要方法:
- 在低海拔侧冲击下对6个圆形CFST成员进行实验测试.
- 钢管厚度,冲击速度和轴负荷的参数变化.
- 有限元分析用于研究轴负荷和缩放对偏移的影响.
- 基于移动塑料链理论的三级刚性塑料机械模型的开发.
主要成果:
- 记录了故障模式,冲击力和偏移时间历史.
- 冲击阻力与轴向压缩比有非单调的关系 (增加然后减少).
- 开发并验证了CFST列的新型偏移计算方法.
结论:
- 拟议的机械模型准确地预测了CFST柱在任何位置的侧向冲击下的偏移.
- 该研究为CFST柱的抗冲击性和动态行为提供了宝贵的见解,为关键基础设施的结构设计提供了信息.
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