预制RC框架结构与连接的渐进式崩阻力的有限元分析,考虑到化物腐蚀
1School of Civil and Transportation Engineering, Yellow River Conservancy Technical University, Kaifeng, China.
PloS one
|November 20, 2025
概括
这项研究评估了预制钢筋混凝土框架结构 (PRCS) 具有钢管连接的渐进式崩阻力. PRCS显示了降低的崩能力,特别是当内部柱子被移除或受到腐蚀的影响时.
科学领域:
- 结构工程 结构工程
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
背景情况:
- 预制建筑提供了效率,但需要严格的安全评估.
- 渐进的抗崩性对于结构完整性和安全性至关重要.
- 钢管连接是现代预制结构的关键组成部分.
研究的目的:
- 为了评估预制钢筋混凝土框架结构 (PRCS) 具有钢管连接的生命周期渐进式崩阻力.
- 为了比较PRCS的崩行为与现场造混凝土框架结构 (CPCS).
- 分析化物诱导腐蚀对PRCS结构崩性能的影响.
主要方法:
- 在SAP2000中使用多段线性塑料连接元件开发了一种简化的预制列模型.
- 建立和分析一个六层PRCS和一个可比的CPCS.
- 在四个不同的柱子移除场景下,使用柱子移除方法模拟渐进式崩.
- 通过推向分析分析化物诱导的腐蚀效应.
主要成果:
- 拟议的连接模型准确地复制了预制柱体关节的行为.
- 内部柱子的移除对PRCS产生了最严重的影响,与CPCS相比,移位增加了72.2%.
- 在特定的柱子移除场景下,PRCS表现出减少的光束机制容量 (25.4%较低) 和连锁机制容量 (33.1%较低).
- 长期腐蚀显著降低了PRCS的渐进式崩能力.
结论:
- 钢管连接方案是可行的,但需要仔细考虑崩场景.
- 与CPCS相比,PRCS显示出不同的崩机制和漏洞.
- 耐用性,特别是化物诱导的腐蚀,显著影响PRCS的渐进式崩抗性,需要将其纳入设计考虑.
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