加固带裂缝混凝土梁的受力性能试验研究
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- 英文论文题名：Mechanical Performance of Cracked Concrete Beams retrofitted by Sprayed UHTCC
- 论文作者：李伟平 ; 穆富江 ; 王激扬 ; 徐世烺
- 英文论文作者：Li Weiping ; Mu Fujiang ; Wang Jiyang ; Xu Shilang ; Zhejiang Provincial Institute of Communications Planning ; Design & Research ; Zhejiang University
- 年：2016
- 作者机构：浙江省交通规划设计研究院;浙江大学;
- 论文关键词：喷射UHTCC ; 修复加固 ; 裂缝控制 ; 承载能力 ; 耐久性
- 英文论文关键词：sprayed UHTCC ; repair of concrete beams ; crack width control ; durability
- 会议召开时间：2016-10-27
- 会议录名称：第九届全国防震减灾工程学术研讨会论文集
- 语种：中文
- 分类号：TU37
- 学会代码：OGTY
- 会议名称：第九届全国防震减灾工程学术研讨会
- 会议地点：中国安徽合肥
- 主办单位：中国土木工程学会、中国工程院土木、水利与建筑工程学部、中国土木工程学会防震减灾工程技术推广委员会、合肥工业大学、安徽省住房和城乡建设厅
- 学会名称：中国土木工程学会
- 页数：9
- 文件大小：1148k
- 原文格式：O
- 会议级别：全国
摘要
对既有受损混凝土结构的加固维修是地震灾后重建的重点之一。本文应用喷射超高韧性水泥基复合材料(UHTCC)的拉伸应变硬化特性,研究了带裂缝混凝土梁底部喷射20mm薄层UHTCC的加固作用。结果表明,薄层喷射UHTCC对混凝土梁的弯曲强度和弯曲刚度有明显的加固作用,可将带预制裂缝的混凝土梁极限承载力提高117.5%,使受损混凝土梁的承载能力恢复到相同尺寸无损混凝土梁承载能力相当的水平;此外混凝土梁底部薄层喷射UHTCC能将裂缝宽度控制在0.1 mm以下的微裂缝,有利于提高混凝土梁的耐久性。
Reinforcing current damaged concrete structure is one of the points of the post-earthquake reconstruction.In this paper,the cracked concrete beams strengthened by 20 mm thin layer UHTCC are studied applying the tensile strain hardening properties of sprayed UHTCC.Test results show a dramatically improvement of 117.5% in the flexural strength when compared with the same concrete beams without being repaired by thin layer of sprayed UHTCC.Besides,cracks' widths were well controlled below 100 um in the layer of UHTCC and the width of crack in concrete is also well limited when the load was at a high level,which is good for the durability of concrete beams.
Reinforcing current damaged concrete structure is one of the points of the post-earthquake reconstruction.In this paper,the cracked concrete beams strengthened by 20 mm thin layer UHTCC are studied applying the tensile strain hardening properties of sprayed UHTCC.Test results show a dramatically improvement of 117.5% in the flexural strength when compared with the same concrete beams without being repaired by thin layer of sprayed UHTCC.Besides,cracks' widths were well controlled below 100 um in the layer of UHTCC and the width of crack in concrete is also well limited when the load was at a high level,which is good for the durability of concrete beams.
引文
[1]王铁梦,工程结构裂缝控制[M].北京:中国建筑工业出版社,1997(Wang Tiemeng.Control of cracking in engineering structure[M].Beijing:China Architecture&Building Press,1997(in Chinese)).
[2]劳宇,混凝土水化热温度损伤研究[D],南京:河海大学,2006.
[3]高小建,阚雪峰,杨英姿.单面干燥条件下混凝土的收缩变形分布特征[J].硅酸盐学报,2009,37(01):87-91(Gao Xiaojian,Kan Xuefeng,Yang Yingzi.Shrinkage distribution of concrete with one surface exposed to dry condition[J].Journal of The Chinese Ceramic Society,2009,37(01):87-91(in Chinese)).
[4]John F.Bonacci and Mohamed Maalej.Externally bonded fiber-reinforced polymer for rehabilitation of corrosion damaged concrete beams[J].ACI Structural Journal,2000.97(5):703-711.
[5]徐福泉.碳纤维布加固钢筋混凝土梁静载性能研究[D].北京:中国建筑科学研究院,2001.
[6]沈蒲生,谭宇昂,钢筋混凝土梁粘钢加固材料最大用量理论与试验研究[J].铁道科学与工程学报,2005,2(05):45-49.(Shen Pusheng,Tan Yuang.Theoretical and test research on maximum utilized quantity of externally bonded strengthened materials of reinforced concrete beams[J].Journal of Railway Science and Engineering,2005,2(05):45-49(in Chinese)).
[7]高轩能,周期源,陈明华.粘钢加固RC梁承载性能的理论和试验研究[J].土木工程学报,2006,39(08):38-44.(Gao Xuanneng,Zhou Qiyuan,Chen Minghua.Theoretical and experimental research on bearing behavior of RC beams strengthened by bonded steel plates[J].China Civil Engineering Journal,2006,39(8):38-44(in Chinese)).
[8]Fang Yuan,Jinlong Pan,Zhun Xu and C.K.Y.Leung.A comparison of engineered cementitious composites versus normal concrete in beam-column joints under reversed cyclic loading[J].Materials and Structures.2013,46:145-159.
[9]Victor C,Li,H.Horii,P.Kabele,T Kanda and Y.M.Lim.Repair and retrofit with engineered cementitious composites[J].Engineering Fracture Mechanics,2000.65(2-3):317-334.
[10]李庆华,高栋,徐世娘,超高韧性水泥基复合材料(UHTCC)的水渗透性能试验研究[J].水利学报,2012,43(S1):76-84.(Li Qinghua,Gao Dong,Xu Shilang.Study on water permeability of UHTCC[J].Shuili Xuebao,2012,43(S1):76-84(in Chinese)).
[11]徐世烺,李贺东,超高韧性水泥基复合材料研究进展及其工程应用[J].土木工程学报,2008,41(06):45-60.(Xu Shilang,Li Hedong.A review on the development of research and application of ultra-high toughness cementitious composites[J].China Civil Engineering Journal,2008,41(6):45-60(in Chinese)).
[12]Yun YongKim,Hyun-Joon Kong and Victor C.Li.Design of engineered cementitious composite suitable for wet-mixture shotcreting[J].ACI Materials Journal,2003.100(6):511-518.
[13]Yun YongKim,Gregor Fischer,Yun Mook Lim and Victor C.Li.Mechanical performance of sprayed engineered cementitious composite using wet-mix shotcreting process for repair applications[J].ACI Materials Journal,2004.101(1):42-49.
[14]李贺东,超高韧性水泥基复合材料试验研究[D],2009,大连理工大学.
[15]Michael D.Lepech and Victor C.Li.Water permeability of engineered cementitious composites.Cement and Concrete Composites,2009.31(10):744-753.
[2]劳宇,混凝土水化热温度损伤研究[D],南京:河海大学,2006.
[3]高小建,阚雪峰,杨英姿.单面干燥条件下混凝土的收缩变形分布特征[J].硅酸盐学报,2009,37(01):87-91(Gao Xiaojian,Kan Xuefeng,Yang Yingzi.Shrinkage distribution of concrete with one surface exposed to dry condition[J].Journal of The Chinese Ceramic Society,2009,37(01):87-91(in Chinese)).
[4]John F.Bonacci and Mohamed Maalej.Externally bonded fiber-reinforced polymer for rehabilitation of corrosion damaged concrete beams[J].ACI Structural Journal,2000.97(5):703-711.
[5]徐福泉.碳纤维布加固钢筋混凝土梁静载性能研究[D].北京:中国建筑科学研究院,2001.
[6]沈蒲生,谭宇昂,钢筋混凝土梁粘钢加固材料最大用量理论与试验研究[J].铁道科学与工程学报,2005,2(05):45-49.(Shen Pusheng,Tan Yuang.Theoretical and test research on maximum utilized quantity of externally bonded strengthened materials of reinforced concrete beams[J].Journal of Railway Science and Engineering,2005,2(05):45-49(in Chinese)).
[7]高轩能,周期源,陈明华.粘钢加固RC梁承载性能的理论和试验研究[J].土木工程学报,2006,39(08):38-44.(Gao Xuanneng,Zhou Qiyuan,Chen Minghua.Theoretical and experimental research on bearing behavior of RC beams strengthened by bonded steel plates[J].China Civil Engineering Journal,2006,39(8):38-44(in Chinese)).
[8]Fang Yuan,Jinlong Pan,Zhun Xu and C.K.Y.Leung.A comparison of engineered cementitious composites versus normal concrete in beam-column joints under reversed cyclic loading[J].Materials and Structures.2013,46:145-159.
[9]Victor C,Li,H.Horii,P.Kabele,T Kanda and Y.M.Lim.Repair and retrofit with engineered cementitious composites[J].Engineering Fracture Mechanics,2000.65(2-3):317-334.
[10]李庆华,高栋,徐世娘,超高韧性水泥基复合材料(UHTCC)的水渗透性能试验研究[J].水利学报,2012,43(S1):76-84.(Li Qinghua,Gao Dong,Xu Shilang.Study on water permeability of UHTCC[J].Shuili Xuebao,2012,43(S1):76-84(in Chinese)).
[11]徐世烺,李贺东,超高韧性水泥基复合材料研究进展及其工程应用[J].土木工程学报,2008,41(06):45-60.(Xu Shilang,Li Hedong.A review on the development of research and application of ultra-high toughness cementitious composites[J].China Civil Engineering Journal,2008,41(6):45-60(in Chinese)).
[12]Yun YongKim,Hyun-Joon Kong and Victor C.Li.Design of engineered cementitious composite suitable for wet-mixture shotcreting[J].ACI Materials Journal,2003.100(6):511-518.
[13]Yun YongKim,Gregor Fischer,Yun Mook Lim and Victor C.Li.Mechanical performance of sprayed engineered cementitious composite using wet-mix shotcreting process for repair applications[J].ACI Materials Journal,2004.101(1):42-49.
[14]李贺东,超高韧性水泥基复合材料试验研究[D],2009,大连理工大学.
[15]Michael D.Lepech and Victor C.Li.Water permeability of engineered cementitious composites.Cement and Concrete Composites,2009.31(10):744-753.
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