CFRP布加固冻融后素混凝土梁的抗弯性能
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摘要
为探讨由CFRP(碳纤维)布全包加固经过冻融后的混凝土试件梁的正截面抗弯承载力,选用模型试验,得到试件梁在经过不同次数冻融之后的极限抗弯承载力试验值,并记录破坏值.采用合理的混凝土冻融损伤模型,推导出CFRP布全包加固的冻融损伤试件梁在理想破坏状态下的抗弯承载力公式,将试验数据与由抗弯承载力公式计算得出的计算值对比可知误差合理,检验了公式的合理性.
In order to study the flexural bearing capacity of freeze-thaw damaged concrete beams strengthened with CFRP sheets,model tests were used to measure the flexural capacity of concrete specimens after different freezing-thawing cycles,and the test data of ultimate bearing capacity were recorded.A reasonable damage model of concrete freeze-thaw damage was used to deduce the formula of the flexural bearing capacity of specimens in a ideal failure state,the error was reasonable by comparing the theoretical value calculated by the derived formula with the experimental value,the rationality of the formula was verified.
In order to study the flexural bearing capacity of freeze-thaw damaged concrete beams strengthened with CFRP sheets,model tests were used to measure the flexural capacity of concrete specimens after different freezing-thawing cycles,and the test data of ultimate bearing capacity were recorded.A reasonable damage model of concrete freeze-thaw damage was used to deduce the formula of the flexural bearing capacity of specimens in a ideal failure state,the error was reasonable by comparing the theoretical value calculated by the derived formula with the experimental value,the rationality of the formula was verified.
引文
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[21]任慧韬,胡安妮,赵国藩.纤维增强塑料与混凝土粘结抗冻融性能研究[J].大连理工大学学报,2003,43(4):495-499.REN H T,HU A N,ZHAO G F.Freeze-thaw resistance behavior of bonded joints between FRP and concrete[J].Journal of Dalian University of Technology,2003,43(4):495-499.
[22]杨忠伟.冻融循环作用下混凝土单轴受压性能试验研究[D].扬州:扬州大学,2010.YANG Z W.Research about uniaxial compression performance of concrete under freeze-thaw cycles[D].Yangzhou:Yangzhou University,2010.
[2]陈小兵,李荣.FRP加固混凝土结构的设计原则及国外设计标准[J].工业建筑,2001,31(4):17-18.CHEN X B,LI R.Design principles and foreign standards of concrete structures strengthened with FRP[J].Industrial Construction,2001,31(4):17-18.
[3]日本建筑学会.钢骨钢筋混凝土结构计算标准及解说[M].北京:原子能出版社,1998.Japanese Architectural Society.Calculation standard and explanation of steel reinforced concrete structure[M].Beijing:Energy Press,1998.
[4]唐伟明,王元清,贾连光,等.各国规范中型钢混凝土结构设计构造与抗裂措施比较分析[C]∥中国钢结构协会结构稳定与疲劳分会第14届(ISSF-2014)学术交流会暨教学研讨会论文集,2014.TANG W M,WANG Y Q,JIA L G,et al.Comparative analysis of design specifications on normal cross section bearing capacity of steel reinforced concrete column[C]∥Proceedings of the 14th(ISSF-2014)Academic Exchange Conference and Teaching Seminar of the Structural Stability and Fatigue Branch of China Steel Structure Association,2014.
[5]ZHOU L,WANG L G,ZONG L,et al.Mechanical performance of glass fiber-reinforced polymer tubes filled with steel-reinforced high-strength concrete subjected to eccentric compression[J].Advances in Structural Engineering,2016,20(3).
[6]万路霞.负载下外包钢筋混凝土加固轴压钢柱力学性能研究[D].沈阳:沈阳大学,2017.WAN L X.Research on mechanical properties of axially loaded steel columns reinforced by outsourcing reinforced concrete while underload[D].Shenyang:Shenyang University,2017.
[7]周乐,吴佳奇.反复冻融作用下轴压混凝土构件的承载力计算[J].沈阳大学学报(自然科学版),2017,29(6):485-489.ZHOU L,WU J Q.Calculation of bearing capacity of axially loaded concrete members subjected to repeated freeze-thaw cycles[J].Journal of Shenyang University(Natural Science),2017,29(6):485-489.
[8]丁道红,章青.混凝土缺陷研究综述[J].混凝土,2009(10):16-18.DING D H,ZHANG Q.Review on concrete blemish[J].Concrete,2009(10):16-18.
[9]赵新铭,欧日强.混凝土结构加固的主要方法与亟待解决的问题[J].港工技术,2007(2):28-31.ZHAO X M,OU R Q.The basic methods and urgent problems in concrete structures strengthening[J].Port Engineering Technology,2007(2):28-31.
[10]李小利.混凝土结构加固技术性能比较[J].北京工业职业技术学院学报,2006,5(4):85-87.LI X L.Compare of concrete reinforcement technologies[J].Journal of Beijing Polytechnic College,2006,5(4):85-87.
[11]中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB 50010-2010[S].北京:中国建筑工业出版社,2015.Ministry of Housing and Urban-Rural Construction of the People's Republic of China.Code for design of concrete structures:GB 50010-2010[S].Beijing:China Architecture&Building Press,2015.
[12]郑先元.既有建筑结构鉴定与加固技术概述及应用[J].现代物业,2011,10(1):54-61.ZHENG X Y.Summary and application of existing building structure appraisal and reinforcement technology[J].Modern Property Management,2011,10(1):54-61.
[13]景莉莉.混凝土结构加固技术在房屋建筑施工中的应用[J].江西建材,2014(21):108.JING L L.Application of reinforced concrete structure technology in building construction[J].Jiangxi Building Materials,2014(21):108.
[14]周禹.钢筋锈蚀与冻融作用下钢筋混凝土梁的抗弯性能[D].沈阳:沈阳建筑大学,2012.ZHOU Y.Bending behavior of RC beam under the action of steel corrosion and freeze-thaw cycles[D].Shenyang:Shenyang Jianzhu University,2012.
[15]中华人民共和国住房和城乡建设部.混凝土结构加固设计规范:GB 50367-2013[S].北京:中国建筑工业出版社,2013.Ministry of Housing and Urban-Rural Construction of the People's Republic of China.Design code for strengthening concrete structure:GB 50367-2013[S].Beijing:China Architecture&Building Press,2013.
[16]谢剑,赵彤,王亨.碳纤维布加固钢筋混凝土梁受弯承载力设计方法的研究[J].建筑技术,2002,33(6):411-413.XIE J,ZHAO T,WANG H.Design method study on flexural strength of reinforced concrete beams strengthened with carbon fibersheet[J].Architecture Technology,2002,33(6):411-413.
[17]ACI Committee 440F.Guide for the design and construction of externally bonded FRP system for strengthening concrete structures[S].American Concrete Institute,2002.
[18]何亚军.碳纤维布(CFRP)加固钢筋混凝土短梁的受弯承载力[D].郑州:郑州大学,市2016.HE Y J.The flexural capacity of reinforced concrete short beams strengthened with carbon fiber reinforced polymer sheets(CFRP)[D].Zhengzhou:Zhengzhou University,2016.
[19]陈月萍,胡强圣,张建飞,等.冻融后预应力混凝土正截面受弯承载力研究[J].建筑材料学报,2015,18(6):993-998.CHEN Y P,HU Q S,ZHANG J F,et al.Flexural bearing capacity of prestressed concrete after freeze-thaw[J].Journal of Building Materials,2015,18(6):993-998.
[20]GANGARAO H V S,BARGER J.Aging of bond between FRP and concrete cubes[J].International Journal of Materials&Product Technology,2001,19(1/2).
[21]任慧韬,胡安妮,赵国藩.纤维增强塑料与混凝土粘结抗冻融性能研究[J].大连理工大学学报,2003,43(4):495-499.REN H T,HU A N,ZHAO G F.Freeze-thaw resistance behavior of bonded joints between FRP and concrete[J].Journal of Dalian University of Technology,2003,43(4):495-499.
[22]杨忠伟.冻融循环作用下混凝土单轴受压性能试验研究[D].扬州:扬州大学,2010.YANG Z W.Research about uniaxial compression performance of concrete under freeze-thaw cycles[D].Yangzhou:Yangzhou University,2010.