基于机器学习的HPC压力强度的预测
Libing Jin1, Jie Duan2,3, Yichen Jin4
1School of Civil Engineering, Henan University of Technology, Zhengzhou, 450000, China. jinlb@haut.edu.cn.
Scientific reports
|July 22, 2024
概括
预测高性能混凝土的强度是复杂的. 综合基因算法支持向量机 (GA-SVM) 模型准确预测压力强度,其中水结合比率是最有影响力的因素.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 计算力学 计算力学 计算力学
背景情况:
- 准确预测高性能混凝土 (HPC) 的压力强度对于结构完整性至关重要.
- HPC组件和压力强度之间的关系是复杂的,高维的,非线性的.
- 现有的模型经常与HPC强度预测的复杂性质作斗争.
研究的目的:
- 为预测HPC压力强度制定一个高效和强大的计算策略.
- 为了比较各种机器学习模型的性能,包括BPNN,SVM,GA-BPNN和GA-SVM.
- 提高预测模型的可解释性,并确定关键影响因素.
主要方法:
- 使用8个提取的特征构建一个压力强度数据库,包含454个数据集.
- 实施和比较四个机器学习模型:BPNN,SVM,GA-BPNN和GA-SVM.
- 灰色关系分析 (GRA) 和沙普利分析用于模型可解释性的应用.
主要成果:
- 组合模型 (GA-BPNN,GA-SVM) 的表现优于单个模型 (BPNN,SVM).
- 与GA-BPNN相比,GA-SVM模型显示出更高的概括能力,融合速度和预测准确性.
- 水结合比被确定为影响HPC压力强度的最重要因素.
结论:
- GA-SVM模型为HPC压力强度预测提供了强大而准确的方法.
- 水结合剂比率是一个关键参数,需要在HPC混合物设计中仔细考虑.
- 这项研究为优化HPC配方和提高预测准确度提供了宝贵的见解.
更多相关视频
相关概念视频
Fatigue Strength of Concrete
182
Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
182
Non-destructive Tests for Concrete Strength
115
The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
115
Relation Between Tensile Strength and Compressive Strength of Concrete
191
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the...
191
Impact Strength of Concrete
189
Impact strength in concrete is a critical measure that reflects the material's capability to endure the forces applied during pile driving and when supporting machinery foundations that experience impulsive loads. It is also essential when handling precast concrete components to prevent accidental damage. The impact strength is assessed by observing the concrete's resistance to repeated impacts and energy absorption capacity. A key indicator of significant damage to concrete is when it...
189
Strength of Cement
129
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
129
Behavior of Concrete Under Compressive Load
153
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
As the concrete specimen fractures under...
153


