考虑滑移的锈蚀混凝土偏压构件抗弯刚度模型
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摘要
对锈蚀混凝土偏压构件抗弯刚度退化的影响因素进行了研究,采用刚度解析法对粘结性能退化后偏压构件的截面刚度进行了理论分析,引入了锈蚀钢筋滑移的粘结退化综合影响系数,建立了考虑滑移的锈蚀钢筋混凝土偏压构件抗弯刚度的计算模型。经试验验证,模型的抗弯刚度计算值与试验实测值结果吻合较好,故模型计算值可为锈蚀混凝土偏心受压构件性能的评估提供参考。
This paper established a computation model of the flexural stiffness of reinforced concrete eccentric compression members with corroded steel bars through systematically investigation of the factors that affect the flexural stiffness of these members.With the introduction of a comprehensive influence coefficient that accounts for the slip of the corroded steel bars,the section stiffness of the members with degraded bond strength was analyzes using stiffness analytic method.Experimental results validated that the calculated flexural stiffnesses agree well with the test results,which proves that the proposed model can be used as a reference for the evaluation of flexural stiffness of the eccentric compression members with corroded steel bars.
This paper established a computation model of the flexural stiffness of reinforced concrete eccentric compression members with corroded steel bars through systematically investigation of the factors that affect the flexural stiffness of these members.With the introduction of a comprehensive influence coefficient that accounts for the slip of the corroded steel bars,the section stiffness of the members with degraded bond strength was analyzes using stiffness analytic method.Experimental results validated that the calculated flexural stiffnesses agree well with the test results,which proves that the proposed model can be used as a reference for the evaluation of flexural stiffness of the eccentric compression members with corroded steel bars.
引文
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[4]Khor E H,Rosowsky D V,Stewart M G.Probabilistic analysis of time-dependent deflections of RC flexural members[J].Computers&Struc-tures,2001,79(16):1461-1472.
[5]彭利英,卫军,武鹏宇.混凝土锈胀开裂的抑制措施[J].自然灾害学报,2011,20(1):62-67.PENG Liying,WEI Jun,WU Pengyu.Restraining measures against rust expansion cracks of concrete[J].Journal of Natural Disasters,2011,20(1):62-67.(in Chinese)
[6]Ezio Giuriani,Plizari A.Interrelation of splitting and flexural cracks in RC beams[J].Journal of Structural Engineering,1998,124(9):1032-1038.
[7]Amin Ghali.Deflection of reinforced concrete members:a critical review[J].ACI Structural Journal,1993,90(4):364-373.
[8]徐善华.混凝土结构退化模型与耐久性评估[D].西安:西安建筑科技大学,2003.XU Shanhua.The Models of Deterioration and Durability Evaluation of Reinforced Concrete Structure[D].Xi'an:Xi'an University of Architectureand Technology,2003.(in Chinese)
[9]张伟平,商登峰,顾祥林.锈蚀钢筋应力-应变关系研究[J].同济大学学报:自然科学版,2006,34(5):586-592.ZHANG Weiping,SHANG Dengfeng,GU Xianglin.Stress-Strain relationship of corroded steel bars[J].Journal of Tongji University:Natural Sci-ence,2006,34(5):586-592.(in Chinese)
[10]Almusallam A A.Effect of corrosion on the properties of reinforcing steel bars[J].Construction and Building Materials,2001(5):361-363.
[11]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,1991.DI Xiaotan,ZHOU Yan.Inspection,Reinforcing and Maintenance for Old Building[M].Beijing:Earthquake Press,1991.(in Chinese)
[12]丁大钧.钢筋混凝土构件抗裂度、裂缝和刚度[M].南京:南京工学院出版社,1986.DING Dajun.Crack Resistance,Cracking and Stiffness of Reinforced Concrete Members[M].Nanjing:Press of Nanjing Institute of Engineer-ing,1986.(in Chinese)
[13]李鹏程.锈蚀钢筋混凝土偏压构件抗弯刚度退化[D].武汉:华中科技大学,2008.LI Pengcheng.Deterioration of Corroded RC Eccentric Compressive Member's Flexural Stiffness[D].Wuhan:Huazhong University of Science andTechnology,2008.(in Chinese)
[14]雷国强.锈蚀钢筋混凝土偏心受压柱承载力试验研究[D].长沙:湖南大学,2007.LEI Guoqiang.Experimental Research on the Carrying Capacity of Corroded R.C.Columns[D].Changsha:Hunan University,2007.(in Chinese)
[2]Ballim Y,Reid J C,Kemp A R.Deflection of RC beams under simultaneous load and steel corrosion[J].Magazine of Concrete Research,2001,53(3):171-181.
[3]任宝双,钱稼茹,聂建国.在用钢筋混凝土简支桥面梁受弯刚度估算[J].工业建筑,2001,31(1):13-15.REN Baoshuang,QIAN Jiaru,NIE Jianguo.Evaluation of bending stiffness for existing simply supported RC bridge beams[J].Industrial Con-struction,2001,31(1):13-15.(in Chinese)
[4]Khor E H,Rosowsky D V,Stewart M G.Probabilistic analysis of time-dependent deflections of RC flexural members[J].Computers&Struc-tures,2001,79(16):1461-1472.
[5]彭利英,卫军,武鹏宇.混凝土锈胀开裂的抑制措施[J].自然灾害学报,2011,20(1):62-67.PENG Liying,WEI Jun,WU Pengyu.Restraining measures against rust expansion cracks of concrete[J].Journal of Natural Disasters,2011,20(1):62-67.(in Chinese)
[6]Ezio Giuriani,Plizari A.Interrelation of splitting and flexural cracks in RC beams[J].Journal of Structural Engineering,1998,124(9):1032-1038.
[7]Amin Ghali.Deflection of reinforced concrete members:a critical review[J].ACI Structural Journal,1993,90(4):364-373.
[8]徐善华.混凝土结构退化模型与耐久性评估[D].西安:西安建筑科技大学,2003.XU Shanhua.The Models of Deterioration and Durability Evaluation of Reinforced Concrete Structure[D].Xi'an:Xi'an University of Architectureand Technology,2003.(in Chinese)
[9]张伟平,商登峰,顾祥林.锈蚀钢筋应力-应变关系研究[J].同济大学学报:自然科学版,2006,34(5):586-592.ZHANG Weiping,SHANG Dengfeng,GU Xianglin.Stress-Strain relationship of corroded steel bars[J].Journal of Tongji University:Natural Sci-ence,2006,34(5):586-592.(in Chinese)
[10]Almusallam A A.Effect of corrosion on the properties of reinforcing steel bars[J].Construction and Building Materials,2001(5):361-363.
[11]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,1991.DI Xiaotan,ZHOU Yan.Inspection,Reinforcing and Maintenance for Old Building[M].Beijing:Earthquake Press,1991.(in Chinese)
[12]丁大钧.钢筋混凝土构件抗裂度、裂缝和刚度[M].南京:南京工学院出版社,1986.DING Dajun.Crack Resistance,Cracking and Stiffness of Reinforced Concrete Members[M].Nanjing:Press of Nanjing Institute of Engineer-ing,1986.(in Chinese)
[13]李鹏程.锈蚀钢筋混凝土偏压构件抗弯刚度退化[D].武汉:华中科技大学,2008.LI Pengcheng.Deterioration of Corroded RC Eccentric Compressive Member's Flexural Stiffness[D].Wuhan:Huazhong University of Science andTechnology,2008.(in Chinese)
[14]雷国强.锈蚀钢筋混凝土偏心受压柱承载力试验研究[D].长沙:湖南大学,2007.LEI Guoqiang.Experimental Research on the Carrying Capacity of Corroded R.C.Columns[D].Changsha:Hunan University,2007.(in Chinese)
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