纤维布加固震损钢筋混凝土管道试验
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摘要
目的研究FRP修复震损钢筋混凝土管道的加固性能.方法首先对预损伤钢筋混凝土管道进行破损加载,模拟中小地震中的损伤,然后内壁粘贴纤维增强复合材料进行加固.研究不同纤维材料加固下、不同损伤程度圆管三点试验的破坏特征、荷载应变关系和极限承载力.结果FRP加固法可以改善管道的受力性能,延缓裂缝的开展速度,提高管道的极限承载力.碳纤维和玻璃纤维这两种材料的加固修复方法均非常有效.应用ANSYS有限元分析软件,建立了圆管三点试验有限元模型,给出了计算条件下的承载力极限值,并与圆管三点试验结果吻合较好.结论受损试件加固后完全可以满足受损前的正常使用要求,并有所提高.此种加固修复技术,可供工程应用参考.
This paper researches on the FRP strengthening capability on restored seismic reinforced concrete pipelines.First of all,pre-damaged reinforced concrete pipes are loaded under three-point mold simulating the medium and small earthquake loads.Then FRP are pasted in the conduits to strengthen them.The results that different damaged pipes' failure mode and load-strain relationship and carrying capacity of reinforced conduits strengthened by CFRP or GFRP are analyzed.The experiment shows positive result of this strengthening method.FRP reinforcement could improve the mechanical properties of the pipe and delay the launching of crack speed,improve the ultimate bearing capacity of pipelines.ANSYS applying,a three-point load finite element model of tubes is established and capacity limits under calculation are given.Calculation and test results are in good agreement.Damaged conduits strengthened by FRP can reach intact regular service conditions.FRP reinforcement is very effective for the pipeline repair after earthquake in practical project.
This paper researches on the FRP strengthening capability on restored seismic reinforced concrete pipelines.First of all,pre-damaged reinforced concrete pipes are loaded under three-point mold simulating the medium and small earthquake loads.Then FRP are pasted in the conduits to strengthen them.The results that different damaged pipes' failure mode and load-strain relationship and carrying capacity of reinforced conduits strengthened by CFRP or GFRP are analyzed.The experiment shows positive result of this strengthening method.FRP reinforcement could improve the mechanical properties of the pipe and delay the launching of crack speed,improve the ultimate bearing capacity of pipelines.ANSYS applying,a three-point load finite element model of tubes is established and capacity limits under calculation are given.Calculation and test results are in good agreement.Damaged conduits strengthened by FRP can reach intact regular service conditions.FRP reinforcement is very effective for the pipeline repair after earthquake in practical project.
引文
[1]叶列平,冯鹏.FRP在工程结构中的应用与发展[J].土木工程学报,2006,39(3):24-36.(Ye Lieping,Feng Peng.Application and develop-ment of FRP in engineering[J].China Civil Engi-neering Journal,2006,39(3):24-36.)
[2]Lees J M.Fiber-reinforced polymers in reinforced and prestressed concrete applications:moving for-ward[J].Progress in Structural Engineering and Ma-terials,2001,3:122-131.
[3]腾锦光,陈建飞.FRP加固混凝土结构[M].北京:中国建筑工业出版社,2005.(Teng Jinguang,Chen Jianfei.FRP reinforce con-crete structure[M].Beijing:China Architecture and Building Press,2005)
[4]王汝樑.地下管线的震害、抗震验算、设计与措施[M].王珞珈,王前信,王田介纯,等译.北京:地震出版社,2007.(Wang Ruliang.Earthquake damage,seismic chec-king,design and resistant measure of pipelines[M].Beijing:Earthquake Press,2007)
[5]刘飞,王苏岩.FRP用于震后地下管道应急加固初探[J].工业建筑,2009,39(433):319-322.(Liu Fei,Wang Suyan.Discussion about FRP for post-earthquake emergency pipeline reinforcement[J].Industrial Construction,2009,39(433):319-322.)
[6]中国国家标准化管理委员会.GB/T11836-2009混凝土和钢筋混凝土排水管[S].北京:中国标准出版社,2009.(Standardization Administration of China.GB/T11836-2009Concrete and reinforced concrete drain-age pipes[S].Beijing:State Standardization Publish-ing House,2009)
[7]北京市市政工程设计研究总院.GB50332-2002给水排水工程管道结构设计规范[S].北京:中国建筑工业出版社,2003.(Beijing General Municipal Engineering Design&Research Institute.GB50332-2002Structural design code for pipe lines of water supply and water engi-neering[S].Beijing:China Architecture and Building Press,2003)
[8]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T16572-2006混凝土和钢筋混凝土排水管试验方法[S].北京:中国标准出版社,2009.(General Administration of Quality Supervision,In-spection and Quarantine of the People's Republic of China,Standardization Administration of China.GB/T16572-2006Concrete and reinforced concrete drainage pipes test method[S].Beijing:State Stand-ardization Publishing House,2006)
[9]刘逸敏,陈尚建,章卫松.土压力作用下纤维加固钢筋混凝土管道的模型试验研究[J].中国农村水利水电,2005(5):51-53.(Liu Yimin,Chen Shangjian,Zhang Weisong.The experimental study on earth pressure conduits of fiber reinforced concrete[J].China Rural Water and Hy-dropower,2005(5):51-53.)
[10]Ha Na Yu,Seong Su Kim,In Uk Hwang,et al.Ap-plication of natural fiber reinforced composites to trenchless rehabilitation of underground pipes[J].Composite Structures,2008,86(1-3):285-290.
[11]Woo Seok Chin,Dai Gil Lee.Development of the trenchless rehabilitation process for underground pipes based on RTM[J].Composite Structures,2005,68(3):267-283.
[12]Dai Gil Lee,Woo Seok Chin,Jae Wook Kwon,et al.Repair of underground buried pipes with resin trans-fer molding[J].Composite Structures,2002,57(1):67?77.
[13]王吉忠,王苏岩,黄承逵.CFRP加固高强混凝土柱抗震性能和延性研究[J].大连理工大学报,2008,48(5):708-714.(Wang Jizhong,Wang Suyan,Huang Chengkui.Re-search on ductility and earthquake-resistance of high-strength concrete column confined by CFRP[J].Journal of Dalian University of Technology,2008,48(5):708-714.)
[14]陆新征,冯鹏,叶列平.FRP布约束混凝土方柱轴心受压性能的有限元分析[J].土木工程学报,2003(2):46-51.(Lu Xinzheng,Feng Peng,Ye Lieping.Behavior of FRP-confined concrete square columns under uniaxi-al loading[J].China Civil Engineering Journal,2003(2):46-51.)
[15]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.(Wang Xinmin.ANSYS numerical analysis of engi-neering structures[M].Beijing:China Communica-tions Press,2007.)
[16]孙治国.基于ANSYS的桥梁极限承载力和滞回特性研究[D].大连:大连理工大学土木水利学院,2006.(Sun Zhiguo.Research on ultimate bearing capacity and hysteretic behavior of bridges based on ANSYS software[D].Dalian:Master thesis of Dalian Uni-versity of Technology,2006.)
[2]Lees J M.Fiber-reinforced polymers in reinforced and prestressed concrete applications:moving for-ward[J].Progress in Structural Engineering and Ma-terials,2001,3:122-131.
[3]腾锦光,陈建飞.FRP加固混凝土结构[M].北京:中国建筑工业出版社,2005.(Teng Jinguang,Chen Jianfei.FRP reinforce con-crete structure[M].Beijing:China Architecture and Building Press,2005)
[4]王汝樑.地下管线的震害、抗震验算、设计与措施[M].王珞珈,王前信,王田介纯,等译.北京:地震出版社,2007.(Wang Ruliang.Earthquake damage,seismic chec-king,design and resistant measure of pipelines[M].Beijing:Earthquake Press,2007)
[5]刘飞,王苏岩.FRP用于震后地下管道应急加固初探[J].工业建筑,2009,39(433):319-322.(Liu Fei,Wang Suyan.Discussion about FRP for post-earthquake emergency pipeline reinforcement[J].Industrial Construction,2009,39(433):319-322.)
[6]中国国家标准化管理委员会.GB/T11836-2009混凝土和钢筋混凝土排水管[S].北京:中国标准出版社,2009.(Standardization Administration of China.GB/T11836-2009Concrete and reinforced concrete drain-age pipes[S].Beijing:State Standardization Publish-ing House,2009)
[7]北京市市政工程设计研究总院.GB50332-2002给水排水工程管道结构设计规范[S].北京:中国建筑工业出版社,2003.(Beijing General Municipal Engineering Design&Research Institute.GB50332-2002Structural design code for pipe lines of water supply and water engi-neering[S].Beijing:China Architecture and Building Press,2003)
[8]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T16572-2006混凝土和钢筋混凝土排水管试验方法[S].北京:中国标准出版社,2009.(General Administration of Quality Supervision,In-spection and Quarantine of the People's Republic of China,Standardization Administration of China.GB/T16572-2006Concrete and reinforced concrete drainage pipes test method[S].Beijing:State Stand-ardization Publishing House,2006)
[9]刘逸敏,陈尚建,章卫松.土压力作用下纤维加固钢筋混凝土管道的模型试验研究[J].中国农村水利水电,2005(5):51-53.(Liu Yimin,Chen Shangjian,Zhang Weisong.The experimental study on earth pressure conduits of fiber reinforced concrete[J].China Rural Water and Hy-dropower,2005(5):51-53.)
[10]Ha Na Yu,Seong Su Kim,In Uk Hwang,et al.Ap-plication of natural fiber reinforced composites to trenchless rehabilitation of underground pipes[J].Composite Structures,2008,86(1-3):285-290.
[11]Woo Seok Chin,Dai Gil Lee.Development of the trenchless rehabilitation process for underground pipes based on RTM[J].Composite Structures,2005,68(3):267-283.
[12]Dai Gil Lee,Woo Seok Chin,Jae Wook Kwon,et al.Repair of underground buried pipes with resin trans-fer molding[J].Composite Structures,2002,57(1):67?77.
[13]王吉忠,王苏岩,黄承逵.CFRP加固高强混凝土柱抗震性能和延性研究[J].大连理工大学报,2008,48(5):708-714.(Wang Jizhong,Wang Suyan,Huang Chengkui.Re-search on ductility and earthquake-resistance of high-strength concrete column confined by CFRP[J].Journal of Dalian University of Technology,2008,48(5):708-714.)
[14]陆新征,冯鹏,叶列平.FRP布约束混凝土方柱轴心受压性能的有限元分析[J].土木工程学报,2003(2):46-51.(Lu Xinzheng,Feng Peng,Ye Lieping.Behavior of FRP-confined concrete square columns under uniaxi-al loading[J].China Civil Engineering Journal,2003(2):46-51.)
[15]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.(Wang Xinmin.ANSYS numerical analysis of engi-neering structures[M].Beijing:China Communica-tions Press,2007.)
[16]孙治国.基于ANSYS的桥梁极限承载力和滞回特性研究[D].大连:大连理工大学土木水利学院,2006.(Sun Zhiguo.Research on ultimate bearing capacity and hysteretic behavior of bridges based on ANSYS software[D].Dalian:Master thesis of Dalian Uni-versity of Technology,2006.)
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