Effect of steel pit on the mechanical property was discussed in succession . numerical results show that exponential relation exists between the yield strength and depth of corrosion pit . the work in this part is the theoretical foundation on the study in modeling of constitutive behavior of the corroded concrete and rusty rebar 基于微觀腐蝕機(jī)理分析了硫酸鹽介質(zhì)對混凝土的膨脹性腐蝕作用,從理論上研究了由于膨脹作用引起混凝土內(nèi)部產(chǎn)生的膨脹應(yīng)力;討論了鋼筋表面銹蝕坑對鋼筋力學(xué)性能的影響,建立了鋼筋屈服強(qiáng)度與蝕坑深度之間的關(guān)系;為受腐蝕混凝土和銹蝕鋼筋本構(gòu)關(guān)系的建立提供了一定的理論基礎(chǔ)。