使用 (FEM-ML) 方法考虑杆效应的宽浅RC梁切割强度的预测建模
Ahmed A Soliman1, Dina M Mansour2, Ayman H Khalil3
1Structural Engineering & Construction Management Department, Faculty of Engineering & Technology, Future University in Egypt, New Cairo, Egypt.
Scientific reports
|May 31, 2024
概括
这项研究使用有限元分析 (FEA) 和机器学习预测宽浅钢筋混凝土梁的剪切强度. 人工神经网络 (ANN) 模型实现了99%的准确性,提供了有价值的工程设计见解.
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:
- 精确预测钢筋混凝土梁的切削强度对于结构安全和设计优化至关重要.
- 宽浅光束由于其几何形状而存在独特的挑战,需要先进的分析方法.
- 现有的方法可能无法完全捕捉混凝土和钢筋在剪切应力下的复杂行为.
研究的目的:
- 开发和验证宽浅钢筋混凝土梁的剪切强度的预测模型.
- 探索有限元分析 (FEA) 和各种机器学习技术在剪切强度预测中的有效性.
- 确定影响这些结构元素剪切行为的关键参数.
主要方法:
- 对实验数据 (13个标本) 进行详细的有限元模型 (FEM) 的开发和验证.
- 进行参数研究以生成77个宽光配置的数据集.
- 训练和比较机器学习模型:遗传编程 (GP),进化多项式回归 (EPR) 和人工神经网络 (ANN).
主要成果:
- FEM表现出很好的准确性,负载和偏移的最大差异分别为8%和12%.
- 机器学习模型显示出高预测能力:GP和EPR实现了>95%的相关性,而ANN达到99%的准确性.
- 灵敏度分析强调了混凝土强度和梁面比作为影响剪切强度的主导因素.
结论:
- 与机器学习相结合的FEA提供了一种强大的方法,用于预测宽浅钢筋混凝土梁的剪切强度.
- 该模型提供了非常准确的预测,对于提高结构设计和工程实践非常有价值.
- 了解材料特性和几何比率的影响对于可靠的剪切强度评估至关重要.
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