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    張德鋒¹  呂志濤²  胡祖光¹
    （1 上海建科預(yù)應(yīng)力技術(shù)工程有限公司  200032； 2 東南大學(xué)土木工程學(xué)院  南京 210096）

[提要]  現(xiàn)有預(yù)應(yīng)力混凝土結(jié)構(gòu)在預(yù)應(yīng)力筋脫鈍后，是否發(fā)生耐久性失效還取決于結(jié)構(gòu)所處的環(huán)境條件。通過(guò)分析各主要因素對(duì)預(yù)應(yīng)力混凝土結(jié)構(gòu)耐久性的影響程度，確立了各主要影響因素的模糊特征函數(shù)，并基于它們之間的邏輯關(guān)系模型，提出了現(xiàn)有預(yù)應(yīng)力混凝土結(jié)構(gòu)耐久性評(píng)估的方法。
[關(guān)鍵詞]  預(yù)應(yīng)力結(jié)構(gòu)  模糊特征函數(shù)  失效概率  耐久性評(píng)估

After the depassivation of steel bars of existing prestressed structures,whether the durability failure may occur or not depends on the exposure conditions where the structures are located. Through analyzing the main factors, which affect the clurability of prestressed concrete structures, the fuzzy characteristic functions of the main affecting factors are built. Based on the logical relation model between these factors, the durability evaluation method on the existing prestressed concrete structures is submitted.
Keywords: prestressed structure; fuzzy characteristic function; failure probability; durability evaluation