港口工程钢筋混凝土结构性能退化模型研究

根据应力和氯离子共同作用下港口工程混凝土结构的性能退化机理,确定了描述结构性能退化的参数:以承载力描述结构安全性退化,以刚度和纵向裂缝描述结构适用性退化。考虑了应力大小、持续时间和氯离子对结构性能的综合影响,提出了港口工程钢筋混凝土结构钢筋锈蚀率计算模型。以钢筋锈蚀率为表征参数,通过理论分析和室内试验,建立了港工钢筋混凝土结构承裁力衰减模型、纵向裂缝开展模型和刚度退化模型。

Performance degradation mode of RC structure for port engineering

Mechanics of performance degradation for harbor engineering under stress and chloride ions is discussed. The safety of structure is described by bearing capacity while the applicability is described by stiffness and longitudinal crack. The model for corrosion rate of reinforcement for RC port structures is proposed after considering the effects of stress intensity and duration and chloride ions on structure performance. The deterioration model of bearing capacity, development model of longitudinal crack and degradation model of stiffness characterized by corrosion rate of reinforcement are established based on the theoretical analysis on multiple factors and lab corrosion experiments.