加大截面法加固混凝土构件的动力性能研究
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摘要
既有建筑物的加固改造是目前建筑工程中新兴的行业之一,其中混凝土结构约占50%以上。因此,加固混凝土构件的动力性能研究,新旧混凝土结合面施工工艺作法的改进,计算理论和方法的完善,是目前国内外结构工程学科研究的重要课题之一。
本论文通过结构低周反复加载试验与数值模拟方法对传统的加大截面法和改进的加大截面法加固混凝土构件进行了动力性能研究,研究表明:与传统加大截面法相比,改进的加大截面法加固混凝土柱的动力性能有了较大提高,其中延性提高约17%,耗能性能提高约14.7%,屈服承载力提高约23%,极限承载力提高约17%,原因在于植筋钢筋的暗销作用,增强了新旧混凝土的协同工作能力;建议对公式中新加混凝土和纵向钢筋强度折减系数进行修正,取值宜在0.95～0.96;由于试验中主要发生的是柱底压碎破坏或弯曲破坏,建议加固时柱底植筋加密,间距宜在100mm～150mm之间;试件新旧结合面处理施工工艺作法能够保证新旧结合面具有良好的粘结性能。
上述研究成果对新旧混凝土协同工作的动力性能的进一步深入研究,完善混凝土结构加固设计规范具有一定的参考价值,为混凝土结构加固改造工程设计和施工提供参考。
The old building's reinforcement is one of emerging professions in the present architectural engineering, and the concrete structure approximately composes above 50%. So the research on reinforcement concretes component's dynamic performance and improvement the construction craft methods about new and old concretes junction plane, and consummation computation theory and method are one of important topics in the present domestic and foreign structural engineering discipline.
This article researches on concretes component’s dynamic performance by the tradition method of enlarging sections and the improved method of enlarging sections through the structure low frequency cyclic loading test and the numerical simulation method, and the research indicate: Comparing with the tradition method of Enlarging sections, Reinforcement concrete column’s the dynamic performance have enhanced greatly through the improvement method of enlarging sections, and the ductility is enhanced by approximately 17%, energy dissipation capacity is enhanced by approximately 14.7%, the yield capacity is enhanced by approximately 23%, the ultimate capacity is enhanced by approximately 17%, the reason lies in plants reinforcement bar’s the wooden key function, Strengthening new and old concretes joint operation ability; It suggests that the new concretes and the longitudinal reinforcement intensity reduction coefficient carries on in the formula, the value in 0.95～0.96; Because the experiment mainly occurs squash destroys or the bending destroys in the base of column ,it suggests that the base of planting reinforcement bar should intensified, the spacing is between 100mm~150mm; The test sample’s new and old junction plane processing and construction craft method can guarantee that the new and old junction plane had the good bonding properties.
The above research results have definite reference value for the new and old concretes coordination's dynamic performance, and perfecting the structure design standard of concrete structure. It also can supply consult for the design and construction of the reinforcement and modification engineering.
本论文通过结构低周反复加载试验与数值模拟方法对传统的加大截面法和改进的加大截面法加固混凝土构件进行了动力性能研究,研究表明:与传统加大截面法相比,改进的加大截面法加固混凝土柱的动力性能有了较大提高,其中延性提高约17%,耗能性能提高约14.7%,屈服承载力提高约23%,极限承载力提高约17%,原因在于植筋钢筋的暗销作用,增强了新旧混凝土的协同工作能力;建议对公式中新加混凝土和纵向钢筋强度折减系数进行修正,取值宜在0.95～0.96;由于试验中主要发生的是柱底压碎破坏或弯曲破坏,建议加固时柱底植筋加密,间距宜在100mm～150mm之间;试件新旧结合面处理施工工艺作法能够保证新旧结合面具有良好的粘结性能。
上述研究成果对新旧混凝土协同工作的动力性能的进一步深入研究,完善混凝土结构加固设计规范具有一定的参考价值,为混凝土结构加固改造工程设计和施工提供参考。
The old building's reinforcement is one of emerging professions in the present architectural engineering, and the concrete structure approximately composes above 50%. So the research on reinforcement concretes component's dynamic performance and improvement the construction craft methods about new and old concretes junction plane, and consummation computation theory and method are one of important topics in the present domestic and foreign structural engineering discipline.
This article researches on concretes component’s dynamic performance by the tradition method of enlarging sections and the improved method of enlarging sections through the structure low frequency cyclic loading test and the numerical simulation method, and the research indicate: Comparing with the tradition method of Enlarging sections, Reinforcement concrete column’s the dynamic performance have enhanced greatly through the improvement method of enlarging sections, and the ductility is enhanced by approximately 17%, energy dissipation capacity is enhanced by approximately 14.7%, the yield capacity is enhanced by approximately 23%, the ultimate capacity is enhanced by approximately 17%, the reason lies in plants reinforcement bar’s the wooden key function, Strengthening new and old concretes joint operation ability; It suggests that the new concretes and the longitudinal reinforcement intensity reduction coefficient carries on in the formula, the value in 0.95～0.96; Because the experiment mainly occurs squash destroys or the bending destroys in the base of column ,it suggests that the base of planting reinforcement bar should intensified, the spacing is between 100mm~150mm; The test sample’s new and old junction plane processing and construction craft method can guarantee that the new and old junction plane had the good bonding properties.
The above research results have definite reference value for the new and old concretes coordination's dynamic performance, and perfecting the structure design standard of concrete structure. It also can supply consult for the design and construction of the reinforcement and modification engineering.
引文
[1][黄仕诚,城市建设经济学[M],中国建筑工业出版社,1987]
[2]王永维.前言.见:第六届全国建筑物鉴定与加固改造学术会议论文集(上册)湖南:湖南大学出版社,2002,1-1
[3]何惠荣.加大截面法加固混凝土偏压中长柱的二阶效应计算研究:[同济大学博士学位论文].上海:同济大学结构工程学院,1996,1-2
[4]Toshi H, Hideakira N, Masashi F. The strengthening methods of the existing reinforced concrete build. In: Proc of 7th WCEE. Istanbul Turkey,1980,89-96
[5]Shunsukesugano, Fujimura M A. Seismic strengthening of existing reinforced concrete building. In: Proc of 7th WCEE. Istanbul Turkey,1980,449-456
[6]Katsuki T, Abdullah. Shear strengthening of reinforced concrete columns using ferrocement jackets. ACI Structural journal, 2001,98(5): 696-704
[7]Abdullah, Katsuki T. An investigation into the behavior and strength of reinforced concrete columns using ferrocement jackets. Cement } Concrete composites, 2003, 25(2): 233-242
[8]Ye L P, Zhang K, Zhao S H, et al. Experimental study on seismic strengthening of RC columns with wrapped CFRP sheets. Construction and Building Materials,2003, 17(5):499-506]
[9]江世永.同种材料加固钢筋混凝土柱的预应力卸载加固研究:【博士后出站报告】.重庆:重庆建筑大学,1998, 6-7
[10]田炜.震损框架抗震加固的试验研究和理论研究:【东南大学博士学位论文】. 南京:东南大学,1995. 2-4
[11]谢慧才,李庚英,熊光晶.新老混凝土粘结界面的微结构及与集料-水泥界面的差异. 工业建筑. 2003,33 (1)
[12]赵志方,周厚贵,袁群,马金刚. 新老混凝土粘结机理研究与工程应用. 中国水利水电出版社. 2003
[13]李先平,赵国藩,张雷顺. 环氧砂改善新老混凝土粘结强度试验研究. 大连理工大学学报. 2005 , 45(2)
[14]韩菊红,袁群,张雷顺.新老混凝土粘结面粗糙度处理实用方法探讨.工业建筑.2001, (2)
[15]Ichro ADACHI,Kunimitu SHIBUYA and Sadao KIMURA,Most suitable surface treatment of the existing concrete pavement,Journal of Chibe Institute ofTechnology,1991,(37)
[16] Sargin M. Stress-train relationship for concrete and analysis of structural concrete sections. Study No.4, Solid Mechanics Division. University of Waterloo, Ontario. Canada. 1971.
[17]足立一郎,《用喷砂(丸)法处理新旧混凝土粘结面的研究》.千叶. 千叶工业大学,1985
[18]司道明.新旧混凝土的结合措施.安徽建筑.1999, (2)
[19]李法冰.新旧混凝土界面性能的研究.2004
[20]Wall J. S. and Shrive N. G. Facts Affecting Bond between New and Old Concrete. ACI Materials Journal, 1988(3 -4),117-125.
[21] Robert J.Frosch,Shear transfer between concreteelements using steel pipe connection,ACI Structural Journal 1999, 96(6).1003-1008.
[22]严志亮.CFRP 加固钢筋混凝土构件力学及耐久性能试验研究.【深圳大学硕士学位文】.2004 年
[23]刘涛.碳纤维[CFRP]布加固混凝土矩形柱的性能研究.【上海大学博士学位论文】.2006
[24]陈杰.FRP 加固钢筋混凝土柱抗震性能的试验研究.【东南大学硕士学位论文】.2004
[25] 李惠强. 建筑结构诊断鉴定与加固修复. 武汉:华中科技大学出版社,1994
[26]杨烨.混凝土结构中界面的粘结方法及性能研究.【西安科技大学硕士学位论文】.2006
[27]李林涛.改进的加大截面法加固偏压构件的受力性能研究.【西安科技大学硕士学位论文】. 2007
[28]蒋隆敏.钢筋网高性能水泥复合砂浆加固RC柱在静载与低周反复荷载作用下的性能研究 .【湖南大学博士学位论文】. 2006
[29]严洲.钢丝网钢筋加固混凝土柱的性能.【汕头大学硕士学位论文】. 2006
[30]曹永蔚,钢筋混凝土框架结构房屋中的钢筋锚接技术[J],建筑施工,1997。[30]林丁末,植筋技术与建筑结构胶在工程中的应用[J,福建建设科技,2001。
[31]罗桂民、李志臣,植筋技术知识建筑技术开发[J] 第 29 卷第 10 期
[32]朱伯龙,结构抗震实验,地震出版社,1989
[33]马永欣,郑山锁,结构实验,科学出版社,2001
[34]唐九如.钢筋混凝土框架节点抗震[M].东南大学出版社.1988.
[35]江见鲸,陆征新,叶列平. 钢筋混凝土结构有限元分析. 清华大学出版社. 2005
[36]沈聚敏,王传志,江见鲸. 钢筋混凝土有限元与板壳极限分析. 北京,清华大学出版社,1993
[37]江见鲸. 钢筋混凝土结构非线性有限元分析. 西安:陕西科学技术出版社,1994
[38]中华人民共和国国家标准.钢筋混凝土结构设计规范(GB50010-2002). 北京:中国建筑工业出版社,2002
[39]中国工程建设标准化协会标准. 混凝土结构加固技术规范(CECS25:90). 北京:中国计划出版社,1992
[2]王永维.前言.见:第六届全国建筑物鉴定与加固改造学术会议论文集(上册)湖南:湖南大学出版社,2002,1-1
[3]何惠荣.加大截面法加固混凝土偏压中长柱的二阶效应计算研究:[同济大学博士学位论文].上海:同济大学结构工程学院,1996,1-2
[4]Toshi H, Hideakira N, Masashi F. The strengthening methods of the existing reinforced concrete build. In: Proc of 7th WCEE. Istanbul Turkey,1980,89-96
[5]Shunsukesugano, Fujimura M A. Seismic strengthening of existing reinforced concrete building. In: Proc of 7th WCEE. Istanbul Turkey,1980,449-456
[6]Katsuki T, Abdullah. Shear strengthening of reinforced concrete columns using ferrocement jackets. ACI Structural journal, 2001,98(5): 696-704
[7]Abdullah, Katsuki T. An investigation into the behavior and strength of reinforced concrete columns using ferrocement jackets. Cement } Concrete composites, 2003, 25(2): 233-242
[8]Ye L P, Zhang K, Zhao S H, et al. Experimental study on seismic strengthening of RC columns with wrapped CFRP sheets. Construction and Building Materials,2003, 17(5):499-506]
[9]江世永.同种材料加固钢筋混凝土柱的预应力卸载加固研究:【博士后出站报告】.重庆:重庆建筑大学,1998, 6-7
[10]田炜.震损框架抗震加固的试验研究和理论研究:【东南大学博士学位论文】. 南京:东南大学,1995. 2-4
[11]谢慧才,李庚英,熊光晶.新老混凝土粘结界面的微结构及与集料-水泥界面的差异. 工业建筑. 2003,33 (1)
[12]赵志方,周厚贵,袁群,马金刚. 新老混凝土粘结机理研究与工程应用. 中国水利水电出版社. 2003
[13]李先平,赵国藩,张雷顺. 环氧砂改善新老混凝土粘结强度试验研究. 大连理工大学学报. 2005 , 45(2)
[14]韩菊红,袁群,张雷顺.新老混凝土粘结面粗糙度处理实用方法探讨.工业建筑.2001, (2)
[15]Ichro ADACHI,Kunimitu SHIBUYA and Sadao KIMURA,Most suitable surface treatment of the existing concrete pavement,Journal of Chibe Institute ofTechnology,1991,(37)
[16] Sargin M. Stress-train relationship for concrete and analysis of structural concrete sections. Study No.4, Solid Mechanics Division. University of Waterloo, Ontario. Canada. 1971.
[17]足立一郎,《用喷砂(丸)法处理新旧混凝土粘结面的研究》.千叶. 千叶工业大学,1985
[18]司道明.新旧混凝土的结合措施.安徽建筑.1999, (2)
[19]李法冰.新旧混凝土界面性能的研究.2004
[20]Wall J. S. and Shrive N. G. Facts Affecting Bond between New and Old Concrete. ACI Materials Journal, 1988(3 -4),117-125.
[21] Robert J.Frosch,Shear transfer between concreteelements using steel pipe connection,ACI Structural Journal 1999, 96(6).1003-1008.
[22]严志亮.CFRP 加固钢筋混凝土构件力学及耐久性能试验研究.【深圳大学硕士学位文】.2004 年
[23]刘涛.碳纤维[CFRP]布加固混凝土矩形柱的性能研究.【上海大学博士学位论文】.2006
[24]陈杰.FRP 加固钢筋混凝土柱抗震性能的试验研究.【东南大学硕士学位论文】.2004
[25] 李惠强. 建筑结构诊断鉴定与加固修复. 武汉:华中科技大学出版社,1994
[26]杨烨.混凝土结构中界面的粘结方法及性能研究.【西安科技大学硕士学位论文】.2006
[27]李林涛.改进的加大截面法加固偏压构件的受力性能研究.【西安科技大学硕士学位论文】. 2007
[28]蒋隆敏.钢筋网高性能水泥复合砂浆加固RC柱在静载与低周反复荷载作用下的性能研究 .【湖南大学博士学位论文】. 2006
[29]严洲.钢丝网钢筋加固混凝土柱的性能.【汕头大学硕士学位论文】. 2006
[30]曹永蔚,钢筋混凝土框架结构房屋中的钢筋锚接技术[J],建筑施工,1997。[30]林丁末,植筋技术与建筑结构胶在工程中的应用[J,福建建设科技,2001。
[31]罗桂民、李志臣,植筋技术知识建筑技术开发[J] 第 29 卷第 10 期
[32]朱伯龙,结构抗震实验,地震出版社,1989
[33]马永欣,郑山锁,结构实验,科学出版社,2001
[34]唐九如.钢筋混凝土框架节点抗震[M].东南大学出版社.1988.
[35]江见鲸,陆征新,叶列平. 钢筋混凝土结构有限元分析. 清华大学出版社. 2005
[36]沈聚敏,王传志,江见鲸. 钢筋混凝土有限元与板壳极限分析. 北京,清华大学出版社,1993
[37]江见鲸. 钢筋混凝土结构非线性有限元分析. 西安:陕西科学技术出版社,1994
[38]中华人民共和国国家标准.钢筋混凝土结构设计规范(GB50010-2002). 北京:中国建筑工业出版社,2002
[39]中国工程建设标准化协会标准. 混凝土结构加固技术规范(CECS25:90). 北京:中国计划出版社,1992