基于OpenSees的锈蚀RC结构底部节点性能研究
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摘要
为了分析节点钢筋粘结性能变化对钢筋混凝土构件性能的影响,本文以框架底部节点为研究对象,对不同锈蚀率的节点性能进行分析。运用OpenSees中的Bond_SP01材料模型并结合零长度截面单元模拟节点钢筋的粘结滑移,不同锈蚀率下的Bond_SP01模型参数通过有限元建模的方法进行修正。对底部节点的数值模拟结果表明:锈蚀严重时,底部节点钢筋粘结滑移对构件性能的影响不容忽视;同时考虑节点钢筋粘结滑移和上部柱体钢筋截面损失两个因素时,钢筋屈服前构件性能主要受节点粘结性能变化影响,钢筋屈服后构件上部纵筋的截面损失对构件性能的影响开始显现,两者对构件整体性能的影响程度相当。所以,在进行锈蚀构件或结构性能分析时,有必要考虑节点性能的影响。
In this paper,the effect of the bond behavior variation on the behavior of RC structure members was investigated using OpenSees.The bottom column joints with different corrosion rates were studied.The Bond_SP01 material model and zero-length section element in OpenSees were used to simulate the bond behavior between concrete and steel rebar.The parameters of Bond_SP01 for different corrosion rates were verified using the Finite Element Model.From this research it is observed that the bond slip between concrete and steel rebar affects the structure behavior significantly when the rebar suffered serious corrosion.The behavior of bottom column joint is governed by the bond between concrete and steel rebar before the steel rebar yield.After that,the loss of rebar section on the column top affects the behavior,and the affects from the bond variation and rebar section loss are nearly the same.It is recommended to consider the bond deterioration effect in the analysis of corrosion member or structure.
In this paper,the effect of the bond behavior variation on the behavior of RC structure members was investigated using OpenSees.The bottom column joints with different corrosion rates were studied.The Bond_SP01 material model and zero-length section element in OpenSees were used to simulate the bond behavior between concrete and steel rebar.The parameters of Bond_SP01 for different corrosion rates were verified using the Finite Element Model.From this research it is observed that the bond slip between concrete and steel rebar affects the structure behavior significantly when the rebar suffered serious corrosion.The behavior of bottom column joint is governed by the bond between concrete and steel rebar before the steel rebar yield.After that,the loss of rebar section on the column top affects the behavior,and the affects from the bond variation and rebar section loss are nearly the same.It is recommended to consider the bond deterioration effect in the analysis of corrosion member or structure.
引文
[1]Fang C Q,Lundgrenb K,Chen L G,Zhu C Y.Corro-sion influence on bond in reinforced concrete[J].Cement and Concrete Research,2004,34:2159-2167.
[2]Lowes L N,Moehle J P,Govindjee S.Concrete-steelbond model for use in finite element modeling of rein-forced concrete structures[J].ACI Struct J,2004,101:501-511.
[3]方明霁,李国强.基于多弹簧模型的空间梁柱单元Ⅰ:理论模型[J].计算力学学报,2008,25(1):129-132.(FANG Ming-ji,LI Guo-qiang.Multi-spring modelbeam elementⅠ:theoretical model[J].Chinese Jour-nal of Computational mechanics,2008,25(1):129-132.(in Chinese))
[4]Spacone E,Filippou F C,Taucer F F.Fiber beam-col-umn model for non-linear analysis of RC frames:PartⅠ.Formulation[J].Earthquake Eng.Struct.Dyn,1996,25:711-725.
[5]艾庆华,王东升,向敏.基于纤维单元的钢筋混凝土桥墩地震损伤评价[J].计算力学学报,2011,28(5):737-742.(AI Qing-hua,WANG Dong-sheng,XIANGMin.Seismic damage evaluation of RC bridge columnsbased on fiber elements[J].Chinese Journal of Com-putational Mechanics,2011,28(5):737-742.(in Chi-nese))
[6]徐云扉,胡庆昌,陈玉峰,等.低周反复荷载下两跨三层钢筋混凝土框架受力性能的试验研究[J].建筑结构学报,1986,7(2):1-15.(XU Yun-fei,HU Qing-chang,CHEN Yu-feng,et al.The experimental studyof the behavior of a two-bay three-story RC frameunder cyclic loading[J].Journal of Building Struc-tures,1986,7(2):1-15.(in Chinese))
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[8]Chen D,Mahadevan S.Chloride-induced reinforce-ment corrosion and concrete cracking simulation[J].Cement and Concrete Composites,2008,30(3):227-238.
[9]Casanova A,Jason L,Davenne L.Bond slip model forthe simulation of reinforced concrete structures[J].Engineering Structures,2012,39:66-78.
[10]Zhao J,Sritharan S.Modeling of strain penetrationeffects in fiber-based analysis of reinforced concretestructures[J].ACI Structural Journal,2007,104(2):133-141.
[11]Lowes L,Altoontash A.Modeling reinforced concretebeam-column joints subjected to cyclic loading[J].ASCE Journal of Structural Engineering,2003,129(12):1686-1697.
[12]赵羽习,金伟良.锈蚀钢筋与混凝土粘结性能的试验研究[J].浙江大学学报(工学版),2002,36(4):352-357.(ZHAO Yu-xi,JIN Wei-liang.Test study onbond behavior of corroded steel bars and concrete[J].Journal of Zhejiang University(EngineeringScience),2002,36(4):352-357.(in Chinese))
[13]徐善华.混凝土结构退化模型与耐久性评估[D].西安建筑科技大学,2003.(XU Shan-hua.The Mod-els of Deterioration and Durability Evaluation of Re-inforced Concrete Structure[D].Xi’an University ofArchitecture and Technology,2003.(in Chinese))
[14]Sulaimaini G,Kaleemullah M,Basunbul L A,et al.In-fluence of corrosion and cracking on bond behaviorand strength of reinforced concrete members[J].ACIStructural Journal,1990,87(2):220-231.
[15]Saatcioglu M,Ozcebe G.Response of reinforced con-crete columns to simulated seismic loading[J].ACIStructural Journal,1989,86(6):3-12.
[16]陈静,刘西拉.锈蚀钢筋混凝土构件粘结滑移本构模型[J].四川建筑科学研究,2008,34(4):1-7.(CHEN Jing,LIU Xi-la.Bond-slip constitutive modelof corroded reinforced concrete member[J].SichuanBuilding Science,2008,34(4):1-7.(in Chinese))
[17]范颖芳,黄振国,李健美,等.受腐蚀钢筋混凝土构件中钢筋与混凝土粘结性能研究[J].工业建筑,1999,29(8):49-51.(FAN Ying-fang,HUANG Zhen-guo,LI Jian-mei,et al.Research on cohesive property be-tween reinforcement and concrete of corroded RCmember[J].Industrial Construction,1999,29(8):49-51.(in Chinese))
[18]金伟良,赵羽习.随不同位置变化的钢筋与混凝土的粘结本构关系[J].浙江大学学报(工学版),2002,36(1):1-6.(JIN Wei-liang,ZHAO Yu-xi.Stress-sliprelationship variation with the position[J].Journalof Zhejiang University(Engineering Science),2002,36(1):1-6.(in Chinese))
[19]CEB-FIP Model Code 1990.Design Code[S].
[20]Open System for Earthquake Engineering Simulation(OpenSees)[EB].Pacific Earthquake EngineeringResearch Center,Univ.of California,Berkeley,http:∥OpenSees.berkeley.edu.(2011).
[21]张誉,蒋利学,张伟平,等.混凝土结构耐久性概论[M].上海:上海科学技术出版社,2003.(ZHANGYu,JIANG Li-xue,ZHANG Wei-ping,et al.Durabil-ity of Concrete Structures[M].Shanghai:ShanghaiScience and Technology Press,2003.(in Chinese))
[2]Lowes L N,Moehle J P,Govindjee S.Concrete-steelbond model for use in finite element modeling of rein-forced concrete structures[J].ACI Struct J,2004,101:501-511.
[3]方明霁,李国强.基于多弹簧模型的空间梁柱单元Ⅰ:理论模型[J].计算力学学报,2008,25(1):129-132.(FANG Ming-ji,LI Guo-qiang.Multi-spring modelbeam elementⅠ:theoretical model[J].Chinese Jour-nal of Computational mechanics,2008,25(1):129-132.(in Chinese))
[4]Spacone E,Filippou F C,Taucer F F.Fiber beam-col-umn model for non-linear analysis of RC frames:PartⅠ.Formulation[J].Earthquake Eng.Struct.Dyn,1996,25:711-725.
[5]艾庆华,王东升,向敏.基于纤维单元的钢筋混凝土桥墩地震损伤评价[J].计算力学学报,2011,28(5):737-742.(AI Qing-hua,WANG Dong-sheng,XIANGMin.Seismic damage evaluation of RC bridge columnsbased on fiber elements[J].Chinese Journal of Com-putational Mechanics,2011,28(5):737-742.(in Chi-nese))
[6]徐云扉,胡庆昌,陈玉峰,等.低周反复荷载下两跨三层钢筋混凝土框架受力性能的试验研究[J].建筑结构学报,1986,7(2):1-15.(XU Yun-fei,HU Qing-chang,CHEN Yu-feng,et al.The experimental studyof the behavior of a two-bay three-story RC frameunder cyclic loading[J].Journal of Building Struc-tures,1986,7(2):1-15.(in Chinese))
[7]戴靠山,袁迎曙.锈蚀框架边节点抗震性能试验研究[J].中国矿业大学学报,2005,1(34):51-56.(DAIKao-shan,YUAN Ying-shu.Experimental study onseismic performance of corroded exterior joints in RCframe[J].Journal of China University of Mining&Technology,2005,1(34):51-56.(in Chinese))
[8]Chen D,Mahadevan S.Chloride-induced reinforce-ment corrosion and concrete cracking simulation[J].Cement and Concrete Composites,2008,30(3):227-238.
[9]Casanova A,Jason L,Davenne L.Bond slip model forthe simulation of reinforced concrete structures[J].Engineering Structures,2012,39:66-78.
[10]Zhao J,Sritharan S.Modeling of strain penetrationeffects in fiber-based analysis of reinforced concretestructures[J].ACI Structural Journal,2007,104(2):133-141.
[11]Lowes L,Altoontash A.Modeling reinforced concretebeam-column joints subjected to cyclic loading[J].ASCE Journal of Structural Engineering,2003,129(12):1686-1697.
[12]赵羽习,金伟良.锈蚀钢筋与混凝土粘结性能的试验研究[J].浙江大学学报(工学版),2002,36(4):352-357.(ZHAO Yu-xi,JIN Wei-liang.Test study onbond behavior of corroded steel bars and concrete[J].Journal of Zhejiang University(EngineeringScience),2002,36(4):352-357.(in Chinese))
[13]徐善华.混凝土结构退化模型与耐久性评估[D].西安建筑科技大学,2003.(XU Shan-hua.The Mod-els of Deterioration and Durability Evaluation of Re-inforced Concrete Structure[D].Xi’an University ofArchitecture and Technology,2003.(in Chinese))
[14]Sulaimaini G,Kaleemullah M,Basunbul L A,et al.In-fluence of corrosion and cracking on bond behaviorand strength of reinforced concrete members[J].ACIStructural Journal,1990,87(2):220-231.
[15]Saatcioglu M,Ozcebe G.Response of reinforced con-crete columns to simulated seismic loading[J].ACIStructural Journal,1989,86(6):3-12.
[16]陈静,刘西拉.锈蚀钢筋混凝土构件粘结滑移本构模型[J].四川建筑科学研究,2008,34(4):1-7.(CHEN Jing,LIU Xi-la.Bond-slip constitutive modelof corroded reinforced concrete member[J].SichuanBuilding Science,2008,34(4):1-7.(in Chinese))
[17]范颖芳,黄振国,李健美,等.受腐蚀钢筋混凝土构件中钢筋与混凝土粘结性能研究[J].工业建筑,1999,29(8):49-51.(FAN Ying-fang,HUANG Zhen-guo,LI Jian-mei,et al.Research on cohesive property be-tween reinforcement and concrete of corroded RCmember[J].Industrial Construction,1999,29(8):49-51.(in Chinese))
[18]金伟良,赵羽习.随不同位置变化的钢筋与混凝土的粘结本构关系[J].浙江大学学报(工学版),2002,36(1):1-6.(JIN Wei-liang,ZHAO Yu-xi.Stress-sliprelationship variation with the position[J].Journalof Zhejiang University(Engineering Science),2002,36(1):1-6.(in Chinese))
[19]CEB-FIP Model Code 1990.Design Code[S].
[20]Open System for Earthquake Engineering Simulation(OpenSees)[EB].Pacific Earthquake EngineeringResearch Center,Univ.of California,Berkeley,http:∥OpenSees.berkeley.edu.(2011).
[21]张誉,蒋利学,张伟平,等.混凝土结构耐久性概论[M].上海:上海科学技术出版社,2003.(ZHANGYu,JIANG Li-xue,ZHANG Wei-ping,et al.Durabil-ity of Concrete Structures[M].Shanghai:ShanghaiScience and Technology Press,2003.(in Chinese))
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