一个新的UT型预制接头的特点,用于在联合轴矩负荷下使用矩形钢管
Menghan Sun1, Luyao He1, Zailin Yang1
1Harbin Engineering University, Harbin City, Heilongjiang Province, China.
PloS one
|July 21, 2025
概括
这项研究引入了一种改进的UT型关节,具有可调节的袖子,以获得更好的建筑耐受性和能量消耗. 轴力显著影响性能,但关节显示出良好的能量吸收,具有验证的预测模型.
科学领域:
- 结构工程 结构工程
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
背景情况:
- 预制建筑要求接头管理建筑公差.
- 确保足够的可塑性和关节中的能量消耗对于地震性能至关重要.
- 现有的联合设计可能无法充分解决耐受性和能量消散要求.
研究的目的:
- 开发和评估一种新的UT型预制接头,具有可调的袖子和能量分散的细分.
- 为了研究拟议的关节在联合轴力和曲矩下的机械行为.
- 为关节的恢复力提出并验证一个简化的分析模型.
主要方法:
- 在UT型关节上进行了静态和循环负荷测试.
- 轴向力 (张力和压力) 与曲矩一起应用.
- 开发了一个简化的三线性恢复力模型,并根据实验数据进行了验证.
主要成果:
- 轴张增加了42.6% (μ = 0.4) 的初始刚度.
- 轴向压缩减少了24.5%的收益率时刻.
- 关节在循环负荷下表现出显著的能量消耗能力,经过验证的模型显示<10%的误差.
结论:
- 拟议的UT型接头有效地管理了施工公差,并提供了能量消耗.
- 轴力是影响关节刚性和强度的关键参数,在设计中需要仔细考虑.
- 在高轴力下发生脆性故障 (曲) 的潜在风险需要在实际应用中注意设计.
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