混凝土结构碳化寿命的时变可靠度分析
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摘要
在一般大气环境下,混凝土结构的耐久性问题主要是由于碳化引起的钢筋锈蚀问题.碳化造成混凝土结构从新建到最终失效破坏过程包括:混凝土中钢筋开始发生锈蚀;混凝土保护层开始出现顺筋裂缝;裂缝宽度达到不容许值或混凝土保护层锈胀剥落等三个阶段.采用拟Monte-Carlo随机模拟方法,计算了以上述三个状态作为极限我状态所对应的时变失效概率,计算结果令人满意.该方法可以应用于混凝土结构受钢筋腐蚀破坏的耐久性寿命预测中.
Under average air environment condition,durability deficiency of reinforced concrete structure is mainly induced by carbonation which will cause reinforcement corrosion in concrete.Usually,the failure process of RC structure from service initiation to ultimate destruction induced by carbonation can be divided into three stages: from service initiation to steel corrosion initiation;from corrosion initiation to concrete cracking initiation and from cracking to crack width up to maximum or concrete cover peeling.With quasi Monte-Carlo method,time-dependent failure probabilities corresponding to these three limit states are calculated and results are agreeable.This methodology is applicable to predict durability life-span of RC structure demolished by steel corrosion.
Under average air environment condition,durability deficiency of reinforced concrete structure is mainly induced by carbonation which will cause reinforcement corrosion in concrete.Usually,the failure process of RC structure from service initiation to ultimate destruction induced by carbonation can be divided into three stages: from service initiation to steel corrosion initiation;from corrosion initiation to concrete cracking initiation and from cracking to crack width up to maximum or concrete cover peeling.With quasi Monte-Carlo method,time-dependent failure probabilities corresponding to these three limit states are calculated and results are agreeable.This methodology is applicable to predict durability life-span of RC structure demolished by steel corrosion.
引文
[1]周新刚.混凝土结构的耐久性与损伤防治[M].北京:中国建材工业出版社,1999.
[2]牛荻涛.混凝土结构耐久性与寿命预测[M].北京:科学出版社,2003.
[3]邸小坛,周燕.旧建筑物的检测加固与维护[M].北京:地震出版社,1992.
[4]徐善华,牛荻涛,陈新孝.钢筋混凝土结构锈胀寿命分析[J].建筑科学,2002,18(5):32-35.
[5]徐善华,牛荻涛,王庆霖.钢筋混凝土结构碳化耐久性分析[J].建筑技术开发,2002,29(8):8-10.
[6]SAETTA A V,VITAIANI R V.Experimental investiga-tion and numerical modeling of carbonation process in re-inforced concrete structures-Part I-Theoretical formula-tion[J].Cement&Concrete Research,2004,34(4):571-579.
[7]ISGOR O B,RAZAQPUR A G.Finite element modelingof coupled heat transfer,moisture transport and carbona-tion processes in concrete structures[J].Cement&Con-crete Composites,2004,26(1):57-73.
[8]BAZANTZ P.Physical model for steel corrosion in con-crete sea structures-theory[J].Journal of Structural Di-vision ASCE,1979,105(6):1137-1153.
[9]BAZANTZ P.Physical model for steel corrosion in con-crete sea structures-application[J].Journal of StructuralDivision ASCE,1979,105(6):1155-1166.
[10]BALLIM Y,REID J C.Reinforcement corrosion and thedeflection of RC beams:an experimental critique of cur-rent test methods[J].Cement&Concrete Composites,2003,25(6):625-632.
[11]AHMAD Shamsad.Reinforcement corrosion in concretestructures,its monitoring and service life prediction:a re-view[J].Cement&Concrete Composites,2003,25(4-5):459-471.
[12]张宇贻,秦权.钢筋混凝土桥梁构件的时变可靠度分析[J].清华大学学报,2001,41(12):65-67.
[13]赵羽习,金伟良.正常使用极限状态下混凝土结构构件可靠度的分析方法[J].浙江大学学报(工学版),2002,36(6):674-679.
[14]唐铁羽,赵国藩.混凝土结构裂缝及保护层碳化极限状态可靠性[J].大连理工大学学报,1997,37(supp.1):154-156.
[15]赵尚传,赵国藩.混凝土结构碳化寿命的概率模型研究[J].四川建筑科学研究,2002,28(1):24-26.
[16]RODRIGUEZ J,ORTEGA L M,CASAL J,et al.Corro-sion of reinforcement and service life of concrete struc-tures[C]//7th International Conference on Durability ofBuilding Materials and Components,7DBMC,May,19-23,1996.Stockholm:1996,1:117.
[17]BENTZ E C.Probabilistic modeling of service life forstructures subjected to chlorides[J].ACI Materials Jour-nal,2003,100(5):391-397.
[2]牛荻涛.混凝土结构耐久性与寿命预测[M].北京:科学出版社,2003.
[3]邸小坛,周燕.旧建筑物的检测加固与维护[M].北京:地震出版社,1992.
[4]徐善华,牛荻涛,陈新孝.钢筋混凝土结构锈胀寿命分析[J].建筑科学,2002,18(5):32-35.
[5]徐善华,牛荻涛,王庆霖.钢筋混凝土结构碳化耐久性分析[J].建筑技术开发,2002,29(8):8-10.
[6]SAETTA A V,VITAIANI R V.Experimental investiga-tion and numerical modeling of carbonation process in re-inforced concrete structures-Part I-Theoretical formula-tion[J].Cement&Concrete Research,2004,34(4):571-579.
[7]ISGOR O B,RAZAQPUR A G.Finite element modelingof coupled heat transfer,moisture transport and carbona-tion processes in concrete structures[J].Cement&Con-crete Composites,2004,26(1):57-73.
[8]BAZANTZ P.Physical model for steel corrosion in con-crete sea structures-theory[J].Journal of Structural Di-vision ASCE,1979,105(6):1137-1153.
[9]BAZANTZ P.Physical model for steel corrosion in con-crete sea structures-application[J].Journal of StructuralDivision ASCE,1979,105(6):1155-1166.
[10]BALLIM Y,REID J C.Reinforcement corrosion and thedeflection of RC beams:an experimental critique of cur-rent test methods[J].Cement&Concrete Composites,2003,25(6):625-632.
[11]AHMAD Shamsad.Reinforcement corrosion in concretestructures,its monitoring and service life prediction:a re-view[J].Cement&Concrete Composites,2003,25(4-5):459-471.
[12]张宇贻,秦权.钢筋混凝土桥梁构件的时变可靠度分析[J].清华大学学报,2001,41(12):65-67.
[13]赵羽习,金伟良.正常使用极限状态下混凝土结构构件可靠度的分析方法[J].浙江大学学报(工学版),2002,36(6):674-679.
[14]唐铁羽,赵国藩.混凝土结构裂缝及保护层碳化极限状态可靠性[J].大连理工大学学报,1997,37(supp.1):154-156.
[15]赵尚传,赵国藩.混凝土结构碳化寿命的概率模型研究[J].四川建筑科学研究,2002,28(1):24-26.
[16]RODRIGUEZ J,ORTEGA L M,CASAL J,et al.Corro-sion of reinforcement and service life of concrete struc-tures[C]//7th International Conference on Durability ofBuilding Materials and Components,7DBMC,May,19-23,1996.Stockholm:1996,1:117.
[17]BENTZ E C.Probabilistic modeling of service life forstructures subjected to chlorides[J].ACI Materials Jour-nal,2003,100(5):391-397.
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