以数据为导向的对嵌入粘土主导土壤的钢筋混凝土结构中腐蚀的数据驱动评估
Shahbaz Ahmad1,2, Siraj Ahmad3, Sabih Akhtar3
1Geomechanics & Geotechnics, University of Kiel, Kiel, Germany. shahbaz.10ahmad@gmail.com.
Scientific reports
|July 2, 2025
概括
人工神经网络 (ANN) 准确地预测粘土土壤中轻度钢铁腐蚀. 抑制剂剂量是最关键的因素,改善基础设施的耐用性.
科学领域:
- 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
- 计算工程 计算工程 计算工程
背景情况:
- 在水泥复合材料中软钢钢筋的腐蚀是民用基础设施中一个主要的耐久性问题.
- 粘土占主导地位的土壤环境呈现出复杂的条件,加速了钢筋腐蚀.
- 腐蚀率的预测建模对于基础设施寿命评估和材料设计至关重要.
研究的目的:
- 研究人工神经网络 (ANN) 模型在预测温和钢筋的腐蚀率方面的有效性.
- 评估环境参数的影响,如化 (NaCl) 含量,抑制剂剂量 (DOI) 和暴露时间对腐蚀率的影响.
- 为了比较Feedforward Backpropagation (FFBP) 和Cascadeforward Backpropagation (CFBP) ANN架构的性能,用于腐蚀预测.
主要方法:
- 开发和培训两个ANN架构:FFBP和CFBP.
- 利用现有文献中的72个实验数据点进行模型培训和测试.
- 输入变量包括NaCl含量 (0-4%),DOI (0-5%) 和暴露时间 (30-180天).
- 使用相关系数 (R),平均绝对百分比误差 (MAPE) 和根平均平方误差 (RMSE) 的性能评估.
- 灵敏度分析,以确定输入参数对腐蚀速率的影响.
主要成果:
- 与CFBP模型相比,FFBP模型显示出更高的预测准确性.
- 在测试期间,FFBP实现了高相关系数 (R) 0.998,MAPE为30.43%和RMSE为0.071.
- 灵敏度分析表明,抑制剂剂对腐蚀率的影响最大,其次是NaCl度和暴露时间.
- 该模型有效地捕捉了在侵蚀性土壤环境中控制腐蚀的复杂,非线性关系.
结论:
- 基于ANN的方法提供了一个可靠的AI驱动的框架,用于预测温和钢筋的腐蚀率.
- 这项研究强调了抑制剂剂量在缓解粘土土壤环境中腐蚀方面的关键作用.
- 这些发现支持机器学习的应用,用于模拟建筑材料的依赖时间的恶化过程.
- 这项研究有助于提高暴露在侵袭性地下条件下的基础设施的耐用性和安全性.
相关概念视频
Corrosion of Reinforcement
257
The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
257
Non-destructive Tests for Concrete Strength
195
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...
195
Abrasion Resistance of Concrete
220
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
One such test is the revolving disc test, where three plates...
220
Measurement of Air Content in Concrete
287
Air content measurement in concrete is critical for ensuring structural integrity and durability of concrete structures, especially in environments prone to severe weather conditions. Accurate air content analysis optimizes concrete's resistance to freeze-thaw cycles and enhances its workability and strength. Several methods are standardized under ASTM guidelines to measure the air content in fresh concrete, each suitable for different concrete types and conditions.
The pressure method,...
The pressure method,...
287
Permeability of Concrete
221
Permeability in the context of concrete refers to how easily liquids or gases can pass through the material. This quality is crucial for assessing the water-tightness and durability of concrete structures and their resistance to chemical attacks. Concrete permeability can be determined through comparative laboratory tests. These tests typically involve sealing a concrete specimen from the sides, applying water pressure to the top surface with pressure, and measuring the amount of water passing...
221
Effect of Sea Water on Concrete
473
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...
Concrete in areas between tide marks,...
473


