反复荷载下锈蚀黏结退化的RC结构数值模拟
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摘要
为了反映钢筋锈蚀对混凝土结构抗震性能的影响,从黏结滑移本构关系出发,推导了钢筋屈服滑移量的计算公式,对考虑节点屈服应变渗透的黏结滑移恢复力模型进行修正;通过引入锈蚀钢筋黏结滑移本构关系,提出了考虑钢筋锈蚀引起黏结退化的黏结滑移恢复力修正模型.利用修正模型,引入锈蚀钢筋本构关系,在OpenSees平台下,对钢筋不同程度锈蚀下的组合件进行了反复荷载作用下的数值模拟,结果与基于试验的受腐蚀混凝土构件恢复力模型的分析结果吻合良好,证明数值模拟方法合理可行.数值分析表明,同时考虑黏结滑移和锈蚀钢筋本构关系的改变,当锈蚀率超过3%时,锈蚀的影响即已明显.
Bond-slip model including strain-penetration effects was modified to better consider how bond deterioration,caused by corrosion of the reinforcement,affects seismic performance.A constitutive law for bond-slip,including corrosion effects,was used to deduce a yield-slip formula for use in the model.An OpenSees platform was studied with the modified model by examining nonlinear behavior of a beam-column sub-assembly under cyclic loading.Simulations agree with the restoring-force model of corroded reinforced concrete that is based upon experimental data.This proves the utility of the new modified model.Simulations indicate that after three percent corrosion the effect on bond strength is obvious and that constitutive relationships must then take this into consideration.
Bond-slip model including strain-penetration effects was modified to better consider how bond deterioration,caused by corrosion of the reinforcement,affects seismic performance.A constitutive law for bond-slip,including corrosion effects,was used to deduce a yield-slip formula for use in the model.An OpenSees platform was studied with the modified model by examining nonlinear behavior of a beam-column sub-assembly under cyclic loading.Simulations agree with the restoring-force model of corroded reinforced concrete that is based upon experimental data.This proves the utility of the new modified model.Simulations indicate that after three percent corrosion the effect on bond strength is obvious and that constitutive relationships must then take this into consideration.
引文
[1]杨红,白绍良.考虑节点内梁纵筋黏结滑移的结构弹塑性地震反应[J].土木工程学报,2004,37(5):16-22.YANG Hong,BAI Shao-liang.Elastoplastic earth-quake response of structure considering slippage be-tween longitudinal steel bar and concrete of beam innodes[J].China Civil Engineering Journal,2004,37(5):16-22.
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[14]贡金鑫,李金波,赵国藩.受腐蚀钢筋混凝土构件的恢复力模型[J].土木工程学报,2005,38(11):38-44.GONG Jin-xin,LI Jin-bo,ZHAO Guo-fan.Resto-ring force model of corroded reinforced concrete ele-ments[J].China Civil Engineering Journal,2005,38(11):38-44.
[15]史庆轩,牛荻涛,颜桂云.反复荷载作用下锈蚀钢筋混凝土压弯构件恢复力性能的试验研究[J].地震工程与工程振动,2000,20(4):44-50.SHI Qing-xuan,NIU Di-tao,YAN Gui-yun.Ex-perimental research on hysteretic characteristics ofcorroded RC members with flexural and compressiveaxial loads[J].Earthquake Engineering and Engi-neering Vibration,2000,20(4):44-50.
[16]Comit Euro-International Beton.CEB-MC1990ECEB-FIP Model Code 1990(design code)[S].Lon-don:Thomas Telford Services Ltd,1993.
[17]ZHAO J,SRITHARAN S.Nonlinear Analysis ofRC Structures with Strain Penetration Effects[C]//Earthquake Engineering Research Institute.Pro-ceedings of 8th National Conference on EarthquakeEngineering.San Francisco:Curran Associates,Inc,2004:104-114.
[18]傅剑平,张川,陈滔,等.钢筋混凝土抗震框架节点受力机理及轴压比影响的试验研究[J].建筑结构学报,2006,27(3):67-77.FU Jian-ping,ZHANG Chuan,CHEN Tao,et al.Experimental investigation of shear mechanism andeffect of axial-compression r ratio on joints in earth-quake-resistant reinforced concrete frame[J].Jour-nal of Building Structures,2006,27(3):67-77.
[19]高振世,王安宝,庞同和.低周反复荷载作用了钢筋混凝土框架的延性和强度[J].东南大学学报:自然科学版,1991,21(4):38-44.GAO Zhen-shi,WANG An-bao,PANG Tong-he.Ductility and strength of reinforced concrete framesunder low cyclic loading[J].Journal of SoutheastUniversity:Natural Science Edition,1991,21(4):38-44.
[20]FILIPPOU F.A Simple Model for Reinforcing BarAnchorages Under Cyclic Excitations[R].Berke-ley:Earthquake Engineering Research Center,1985.
[21]袁迎曙,贾福萍,蔡跃.锈蚀钢筋混凝土梁的结构性能退化模型[J].土木工程学报,2001,34(03):47-52.YUAN Ying-shu,JIA Fu-ping,CAI Yue.Thestructural behavior deterioration model for corrodedreinforced concrete beams[J].China Civil Engineer-ing Journal,2001,34(03):47-52.
[22]MAZZONI S,FRANK M,MICHAEL S,et al.OpenSees Command Language Manual[EB/OL].(2007-07-01)[2008-11-01].http://opensees.berkeley.edu.
[23]MAZZONI S,FRANK M,MICHAEL S,et al.OpenSees Examples Primer[EB/OL].(2006-06-14)[2008-11-01].http://opensees.berkeley.edu.
[2]框架节点专题研究组.低周反复荷载作用下钢筋混凝土框架梁柱节点核心区抗剪强度的试验研究[J].建筑结构学报,1983,4(6):1-17.Research group on frame joints.Shear strength of re-inforced concrete beam-column joints under low re-versed cyclic loading[J].Journal of Building Struc-tures,1983,4(6):1-17.
[3]吕西林,郭子雄,王亚勇.RC框架梁柱组合件抗震性能试验研究[J].建筑结构学报,2001,22(1):2-7.LU Xi-lin,GUO Zi-xiong,WANG Ya-yong.Experi-mental study on seismic behavior of beam-columnsubassemblages in RC frame[J].Journal of BuildingStructures,2001,22(1):2-7.
[4]Fédération internationale du béton(FIB).Bond ofReinforcement in Concrete:State-of-art Report[M].Lausanne:FIB-Féd Int du Béton,2000.
[5]郭子雄,周素琴.RC框架节点的弯矩-滑移转角恢复力模型[J].地震工程与工程振动,2003,23(3):118-124.GUO Zi-xiong,ZHOU Su-qin.A hysteretic modelfor simulating moment-anchorage slip rotation rela-tionship of RC frame structure[J].Earthquake Engi-neering and Engineering Vibration,2003,23(3):118-124.
[6]ZHAO J,SRI S.Modeling of strain penetration eff-ects in fiber-based analysis of reinforced concretestructures[J].ACI Structural Journal,2007,104(2):104-114.
[7]吴庆,袁迎曙.基于钢筋锈蚀的混凝土梁承载能力退化预计模型[J].中国矿业大学学报,2008,37(4):509-513.WU Qing,YUAN Ying-shu.A model for degenera-tion in bearing capacity of concrete beams with corro-ded reinforcing bars[J].Journal of China Universityof Mining&Technology,2008,37(4):509-513.
[8]LUISA B,SIMIONI P,SAETTA A.Numerical mo-delling of bond behaviour in RC structures affected byreinforcement corrosion[J].Engineering Structures,2008,30:1375-1385.
[9]CASTEL A,FRANFOIS R,ARLIGUIE G.Mecha-nical behaviour of corroded reinforced concretebeams-Part 2:Bond and notch effects[J].Materialsand Structure,2000,33(11):545-551.
[10]CASTEL A,FRANFOIS R,ARLIGUIE G.Me-chanical behaviour of corroded reinforced concretebeams:Part 1:Experimental study of corrodedbeams[J].Materials and Structure,2000,33(11):539-544.
[11]LUISA B,VITALIANI R,SAETTA A,et al.Seismic assessment of existing RC structures affect-ed by degradation phenomena[J].Structural Safe-ty,2008,10(9):1-14.
[12]李富民,袁迎曙,姬永生,等.混凝土中钢筋的腐蚀动力学行为[J].中国矿业大学学报,2008,37(4):565-569.LI Fu-min,YUAN Ying-shu,JI Yong-sheng,et al.The corrosion kinetics of steel bgars embedded inconcrete[J].Journal of China University of Mining&Technology,2008,37(4):565-569.
[13]袁迎曙,姬永生,牟艳君.混凝土内钢筋锈蚀层发展和锈蚀量分布模型研究[J].土木工程学报,2007,40(7):5-10.YUAN Ying-shu,JI Yong-sheng,MU Yan-jun.Propagation and model of distribution for corrosionof steel bars in concrete[J].China Civil EngineeringJournal,2007,40(7):5-10.
[14]贡金鑫,李金波,赵国藩.受腐蚀钢筋混凝土构件的恢复力模型[J].土木工程学报,2005,38(11):38-44.GONG Jin-xin,LI Jin-bo,ZHAO Guo-fan.Resto-ring force model of corroded reinforced concrete ele-ments[J].China Civil Engineering Journal,2005,38(11):38-44.
[15]史庆轩,牛荻涛,颜桂云.反复荷载作用下锈蚀钢筋混凝土压弯构件恢复力性能的试验研究[J].地震工程与工程振动,2000,20(4):44-50.SHI Qing-xuan,NIU Di-tao,YAN Gui-yun.Ex-perimental research on hysteretic characteristics ofcorroded RC members with flexural and compressiveaxial loads[J].Earthquake Engineering and Engi-neering Vibration,2000,20(4):44-50.
[16]Comit Euro-International Beton.CEB-MC1990ECEB-FIP Model Code 1990(design code)[S].Lon-don:Thomas Telford Services Ltd,1993.
[17]ZHAO J,SRITHARAN S.Nonlinear Analysis ofRC Structures with Strain Penetration Effects[C]//Earthquake Engineering Research Institute.Pro-ceedings of 8th National Conference on EarthquakeEngineering.San Francisco:Curran Associates,Inc,2004:104-114.
[18]傅剑平,张川,陈滔,等.钢筋混凝土抗震框架节点受力机理及轴压比影响的试验研究[J].建筑结构学报,2006,27(3):67-77.FU Jian-ping,ZHANG Chuan,CHEN Tao,et al.Experimental investigation of shear mechanism andeffect of axial-compression r ratio on joints in earth-quake-resistant reinforced concrete frame[J].Jour-nal of Building Structures,2006,27(3):67-77.
[19]高振世,王安宝,庞同和.低周反复荷载作用了钢筋混凝土框架的延性和强度[J].东南大学学报:自然科学版,1991,21(4):38-44.GAO Zhen-shi,WANG An-bao,PANG Tong-he.Ductility and strength of reinforced concrete framesunder low cyclic loading[J].Journal of SoutheastUniversity:Natural Science Edition,1991,21(4):38-44.
[20]FILIPPOU F.A Simple Model for Reinforcing BarAnchorages Under Cyclic Excitations[R].Berke-ley:Earthquake Engineering Research Center,1985.
[21]袁迎曙,贾福萍,蔡跃.锈蚀钢筋混凝土梁的结构性能退化模型[J].土木工程学报,2001,34(03):47-52.YUAN Ying-shu,JIA Fu-ping,CAI Yue.Thestructural behavior deterioration model for corrodedreinforced concrete beams[J].China Civil Engineer-ing Journal,2001,34(03):47-52.
[22]MAZZONI S,FRANK M,MICHAEL S,et al.OpenSees Command Language Manual[EB/OL].(2007-07-01)[2008-11-01].http://opensees.berkeley.edu.
[23]MAZZONI S,FRANK M,MICHAEL S,et al.OpenSees Examples Primer[EB/OL].(2006-06-14)[2008-11-01].http://opensees.berkeley.edu.
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