在施工过程中组合的随机缺陷下预制轻度尺钢框架材料的曲性能:基于批判性的分析
Gang Yao1,2, Ting Lei2,3, Yang Yang1,2
1Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China.
Materials (Basel, Switzerland)
|July 30, 2025
概括
轻尺钢框架 (LGSF) 的缺陷可能会导致不稳定. 一个新的基于CRITIC的模型识别了关键缺陷组合,改进了LGSF材料的结构安全分析.
科学领域:
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
背景情况:
- 轻尺钢框架 (LGSF) 材料容易出现设计,制造和立方面的缺陷.
- 这些缺陷可能会损害结构完整性和稳定性,特别是在施工过程中.
- 现有的概率方法难以完全捕捉材料和结构复杂性,导致预测不准确.
研究的目的:
- 在组合缺陷场景下开发一个创新的模型来评估LGSF材料.
- 为了确定由组合缺陷引起的最有害的曲折模式组合.
- 提高LGSF结构的计算预测的可靠性和安全性.
主要方法:
- 利用标准重要性通过标准间相关性 (CRITIC) 方法来评估组合缺陷下的曲模式.
- 确定了代表最不利情景的最关键的模式组合.
- 在LGSF模型上执行有限元分析,基于来自CRITIC的关键场景.
主要成果:
- 与传统方法相比,基于CRITIC的模型预测了临界负载因子的0%~5%降低.
- 观察到控制节点的最终位移增加了1%~3%.
- 证明一级曲模式并不总是LGSF材料中最有害的故障模式.
结论:
- 基于CRITIC的组合缺陷分析模型提高了LGSF结构模拟的可靠性和安全性.
- 这种方法提供了在组合不完美的情况下对曲模式的更批判的评估.
- 这项研究挑战了LGSF曲分析中关于初级故障模式的传统假设.
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