当前位置:
X-MOL 学术
›
Comput. Struct.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Multiphysics Modeling of Chloride-Induced Corrosion Damage in Concrete Structures
Computers & Structures ( IF 4.4 ) Pub Date : 2025-01-20 , DOI: 10.1016/j.compstruc.2025.107643
Mojtaba Aliasghar-Mamaghani, Ioannis Koutromanos, Carin Roberts-Wollmann, Matthew Hebdon
Computers & Structures ( IF 4.4 ) Pub Date : 2025-01-20 , DOI: 10.1016/j.compstruc.2025.107643
Mojtaba Aliasghar-Mamaghani, Ioannis Koutromanos, Carin Roberts-Wollmann, Matthew Hebdon
This paper presents a computational scheme describing the formation and evolution of cracks in concrete structures due to chloride-induced corrosion in reinforcing or prestressing steel. The scheme accounts for coupled heat, moisture and chloride transport, while phenomenologically describing the kinetics of the electrochemical corrosion reaction in steel, formation of expansive corrosion products, and subsequent formation of stresses and cracks in concrete. Advective and diffusive chloride transport mechanisms are considered. The increase in concrete permeability against moisture and chloride transport due to cracking is considered in the constitutive laws. Novel equations are proposed to accurately describe the expansion of corrosion products. The scheme is calibrated using data from small-scale tests in the literature. Subsequently, it is applied to the simulation of real-life prestressed concrete bridge beams that exhibited corrosion-induced cracking after decades of service. The boundary conditions represent the ambient climate data, obtained from weather stations near the bridges. The analyses reproduce the observed cracking damage and enable the investigation of the validity of modeling assumptions commonly adopted in analytical studies for concrete infrastructure durability. The results also emphasize the significance of cracking on the evolution and spatial distribution of chloride content and on the extent of corrosion.
中文翻译:
混凝土结构中氯化物诱导腐蚀损伤的多物理场建模
本文提出了一种计算方案,描述了钢筋或预应力钢中氯化物诱导腐蚀导致混凝土结构裂缝的形成和演变。该方案考虑了热、湿和氯化物耦合传输,同时从现象学上描述了钢中电化学腐蚀反应的动力学、膨胀腐蚀产物的形成以及随后在混凝土中形成的应力和裂缝。考虑了平流和弥漫的氯离子传输机制。本构定律考虑了由于开裂引起的混凝土对水分和氯化物传输的渗透性的增加。提出了新的方程来准确描述腐蚀产物的膨胀。该方案使用文献中小规模测试的数据进行校准。随后,它被应用于模拟现实生活中的预应力混凝土桥梁,这些桥梁在服役数十年后出现腐蚀引起的开裂。边界条件表示从桥梁附近的气象站获得的环境气候数据。这些分析再现了观察到的开裂损伤,并能够调查混凝土基础设施耐久性分析研究中常用的建模假设的有效性。结果还强调了开裂对氯化物含量的演变和空间分布以及腐蚀程度的重要性。
更新日期:2025-01-20
中文翻译:
混凝土结构中氯化物诱导腐蚀损伤的多物理场建模
本文提出了一种计算方案,描述了钢筋或预应力钢中氯化物诱导腐蚀导致混凝土结构裂缝的形成和演变。该方案考虑了热、湿和氯化物耦合传输,同时从现象学上描述了钢中电化学腐蚀反应的动力学、膨胀腐蚀产物的形成以及随后在混凝土中形成的应力和裂缝。考虑了平流和弥漫的氯离子传输机制。本构定律考虑了由于开裂引起的混凝土对水分和氯化物传输的渗透性的增加。提出了新的方程来准确描述腐蚀产物的膨胀。该方案使用文献中小规模测试的数据进行校准。随后,它被应用于模拟现实生活中的预应力混凝土桥梁,这些桥梁在服役数十年后出现腐蚀引起的开裂。边界条件表示从桥梁附近的气象站获得的环境气候数据。这些分析再现了观察到的开裂损伤,并能够调查混凝土基础设施耐久性分析研究中常用的建模假设的有效性。结果还强调了开裂对氯化物含量的演变和空间分布以及腐蚀程度的重要性。