钢筋锈蚀量对周围混凝土应力场的参数敏感性分析

Parameters sensitivity analysis on corrosion of reinforcement to concrete stress field

通过对钢筋锈蚀产生的膨胀产物用虚拟径向位移表示,变化虚拟径向位移达到对周围混凝土应力场影响的分析,模拟了多根锈蚀钢筋对周围混凝土应力场的影响,与设计中常规的钢筋分布相符,用应力路径的方式显示钢筋附近混凝土的应力变化,尤其是保护层附近混凝土剖面应力的变化值,清楚地了解到保护层最外缘混凝土的应力分布,可以判断分布钢筋锈蚀对表层混凝土的破坏位置,验证了用有限元方法分析混凝土应力场参数敏感性分析的可行性。

Swelling product caused by steel erosion will be simulated by dummy radial displacement.The effect of concrete stress field will be analyzed by varying dummy radial displacement.Considering routine steel distribution,concrete stress variety round steel is revealed by concrete stress path.The stress distribution law is clearly,especially the stress outside concrete protection cover.The destroy location of surface layer concrete caused by steel erosion will be judged.The feasibility of sensitive parameter analysis is verified by analyzing concrete stress field with finite element method.