关于非断层PHC管道和轴承平台的节点复合轴承性能研究
Yasheng Liu1, Zhaosheng Guo1, Wubin He1
1College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
Materials (Basel, Switzerland)
|July 13, 2024
概括
这项研究测试了预应力混凝土 (PHC) 管道堆,揭示了嵌入深度的增加显著提高了最终承载能力. 首选的节点设计具有特定的强化和250毫米的嵌入深度是最佳性能.
科学领域:
- 土木工程 土木工程是指土木工程.
- 地质技术工程 地质技术工程
- 结构工程 结构工程
背景情况:
- 预压混凝土 (PHC) 管道堆在基础设施中至关重要.
- 了解复杂负载下的节点行为对于结构完整性至关重要.
- 现有的研究可能无法完全解决PHC节点中的损伤机制.
研究的目的:
- 调查PHC管道堆节点的损坏过程和承载性能.
- 为了描述在拉伸-曲-剪切负荷下的标本的形态.
- 为了确定最佳的嵌入深度和节点设计,以提高承载能力.
主要方法:
- 在非截断的PHC B 600 130带有轴承节点的管状上进行了脚尺测试.
- 应用了低圆周反转负荷来模拟现实世界的条件.
- 使用数值模拟来验证测试结果并分析各种节点配置.
主要成果:
- 在拉力-曲-剪切负荷下,轴承混凝土扣,和固的钢筋产量,导致减弱的约束和增加节点旋转能力.
- 嵌入深度从200mm增加到300mm,最终承载能力增加了31.04% (正值) 和36.16% (负值).
- 数字分析证实了测试结果,并评估了不同类型的和嵌入深度.
结论:
- 该研究确定了在联合负载下PHC堆节点的关键损伤机制.
- 最佳性能是通过一个终端板接杆和管道堆芯填充的纵向增强在轴承节点实现的.
- 建议在拟议的节点设计中采用250mm的嵌入深度.
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