Evaluating the Combined Effects of Stress and Deterioration in Concrete Subjected to Deleterious Environments

评估有害环境下混凝土的应力和劣化的综合影响

• 批准号: 342535-2012
• 负责人: Boyd, Andrew
• 金额: $ 1.53万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=509052
• 关键词: Evaluating; Combined; Effects; Stress; Deterioration

Concrete is inherently a brittle material, exhibiting low tensile strength and strain capacities. From a structural viewpoint, this is overcome by the addition of reinforcing steel to carry applied tensile loads. However, tensile stresses are still present in the concrete and it tends to crack relatively easily in service. The initiation of cracking leads to accelerated deterioration as deleterious agents penetrate more readily into the cracks. At this point, the rate of deterioration increases exponentially as cracks widen or more cracks form.

混凝土本质上是脆性材料，表现出低拉伸强度和应变能力。从结构的角度来看，这是克服了钢筋的增加，以承担所施加的拉伸载荷。然而，混凝土中仍然存在拉应力，并且在使用中相对容易开裂。开裂的开始导致加速劣化，因为有害试剂更容易渗透到裂纹中。在这一点上，恶化的速度随着裂纹的扩大或更多裂纹的形成而呈指数级增加。