CFRP筋复合型锚具锚固性能研究
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摘要
为解决碳纤维增强复合材料(CFRP)筋的锚固问题,研制了由粘结材料、金属筒、夹片和锚环组成的CFRP筋复合型锚具,并进行了夹片长度、金属筒长度、夹片夹持位置以及粘结材料对CFRP筋复合型锚具的锚固性能影响试验。结果表明:粘结材料、金属筒长度和夹片夹持位置均对锚固性能有较大影响;夹片的夹持位置应避免在金属筒两端,且宜使金属筒受压区长度小于受拉区长度;Lica-B型粘结材料锚固性能优于Lica-A型粘结材料;复合型锚具各组件协同工作性能良好,夹片与金属筒间无滑移产生;参数合理的该类复合型锚具可有效锚固直径为8mm的CFRP筋。
In order to solve the anchorage problems for carbon fiber reinforced polymer(CFRP) tendons,a wedge-bond anchorage for CFRP tendons was developed.This anchorage consisted of bonding material,metal sleeve,clip and conical barrel.Influence factors of anchorage performance,such as length of clip,length of metal sleeve,clip clamping position and bonding material were illustrated.Results show that bonding material,length of metal sleeve,and clip clamping position will have significant influence on anchorage performance.The clip clamping position should be avoided at both ends of the metal sleeve,and should make compression zone metal sleeve length be less than that of the tension zone length.Meanwhile,the anchorage performance of bonding material Lica-B is better than that of bonding material Lica-A.The each component of wedge-bond anchorage has good cooperative work performance,and there is no relative slip between clip and metal sleeve.The wedge-bond anchorage with reasonable parameters can anchor CFRP tendons with diameter of 8 mm effectively.
In order to solve the anchorage problems for carbon fiber reinforced polymer(CFRP) tendons,a wedge-bond anchorage for CFRP tendons was developed.This anchorage consisted of bonding material,metal sleeve,clip and conical barrel.Influence factors of anchorage performance,such as length of clip,length of metal sleeve,clip clamping position and bonding material were illustrated.Results show that bonding material,length of metal sleeve,and clip clamping position will have significant influence on anchorage performance.The clip clamping position should be avoided at both ends of the metal sleeve,and should make compression zone metal sleeve length be less than that of the tension zone length.Meanwhile,the anchorage performance of bonding material Lica-B is better than that of bonding material Lica-A.The each component of wedge-bond anchorage has good cooperative work performance,and there is no relative slip between clip and metal sleeve.The wedge-bond anchorage with reasonable parameters can anchor CFRP tendons with diameter of 8 mm effectively.
引文
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[13]诸葛萍,强士中.新型CFRP筋夹片式锚具理论与试验研发[J].土木工程学报,2011,44(10):67-72.ZHUGE Ping,QIANG Shi-zhong.Theoretical andExperimental Investigation of a New CFRP TendonWedge-anchor[J].China Civil Engineering Journal,2011,44(10):67-72.
[14]蒋田勇,方志.CFRP筋复合式锚具锚固性能的试验研究[J].土木工程学报,2010,43(2):79-87.JIANG Tian-yong,FANG Zhi.Experimental Investi-gation on the Performance of Wedge-bond Anchorsfor CFRP Tendons[J].China Civil Engineering Jour-nal,2010,43(2):79-87.
[15]詹界东,杜修力,王作虎.CFRP筋夹片-黏结型锚具的研制[J].北京工业大学学报,2011,37(3):418-424.ZHAN Jie-dong,DU Xiu-li,WANG Zuo-hu.Wedge-bond Anchorage of CFRP Tendons[J].Journal of Bei-jing University of Technology,2011,37(3):418-424.
[16]王军,李明君,蔡东升,等.CFRP筋复合型锚具的受力性能试验[J].江苏大学学报:自然科学版,2012,33(6):726-729.WANG Jun,LI Ming-jun,CAI Dong-sheng,et al.Me-chanical Behavior Experiment of Wedge-bond An-chorage for CFRP-tendons[J].Journal of JiangsuUniversity:Natural Science Edition,2012,33(6):726-729.
[17]JGJ85—2002,预应力筋用锚具、夹具和连接器应用技术规程[S].JGJ 85—2002,Technical Specification for Applicationof Anchorage,Grip and Coupler for Prestressing Ten-dons[S].
[2]MUFTI A A.FRPs and FOSs Lead to Innovation inCanadian Civil Engineering Structures[J].Construc-tion and Building Materials,2003,17(6/7):379-387.
[3]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 Lie-ping,FENG Peng.Applications and Develop-ment of Fiber-reinforced Polymer in EngineeringStructures[J].China Civil Engineering Journal,2006,39(3):24-36.
[4]吕志涛,梅葵花.国内首座CFRP索斜拉桥的研究[J].土木工程学报,2007,40(1):54-59.LU Zhi-tao,MEI Kui-hua.First Application of CFRPCables for a Cable-stayed Bridge in China[J].ChinaCivil Engineering Journal,2007,40(1):54-59.
[5]于峰,牛荻涛,贺拴海.纤维复合材料约束混凝土柱的统一强度模型[J].长安大学学报:自然科学版,2010,30(2):70-74.YU Feng,NIU Di-tao,HE Shuan-hai.Unified Com-pressive Strength Model of FRP-confined ConcreteColumn[J].Journal of Chang'an University:NaturalScience Edition,2010,30(2):70-74.
[6]李炳宏,江世永,飞渭,等.纤维增强塑料筋混凝土梁抗弯设计数值分析[J].长安大学学报:自然科学版,2011,31(5):50-56.LI Bing-hong,JIANG Shi-yong,FEI Wei,et al.Nu-merical Analysis of Flexural Design of ConcreteBeams Reinforced with FRP Bars[J].Journal ofChang'an University:Natural Science Edition,2011,31(5):50-56.
[7]卓静,李唐宁.波形齿夹具锚和U型箍锚固作用的力学机理[J].中国公路学报,2007,20(3):48-53.ZHUO Jing,LI Tang-ning.Mechanical Mechanism ofAnchorage Effect on Wave-shape-gear-grip Anchorand U-ferrule[J].China Journal of Highway andTransport,2007,20(3):48-53.
[8]周士金,刘荣桂,蔡东升,等.CFRP索大跨斜拉桥的非线性地震响应控制分析[J].中国公路学报,2011,24(3):64-71.ZHOU Shi-jin,LIU Rong-gui,CAI Dong-sheng,et al.Nonlinear Seismic Response Control Analysis ofLong-span Cable-stayed Bridge with CFRP Cables[J].China Journal of Highway and Transport,2011,24(3):64-71.
[9]刘荣桂,李明君,蔡东升,等.CFRP筋锚固体系研究与应用现状[J].建筑科学与工程学报,2012,29(2):14-20.LIU Rong-gui,LI Ming-jun,CAI Dong-sheng,et al.Research and Application Situation of CFRP TendonAnchorage System[J].Journal of Architecture andCivil Engineering,2012,29(2):14-20.
[10]ZHANG B,BENMKORANE B.Design and Evalua-tion of a New Bond-type Anchorage System for FiberReinforced Polymer Tendons[J].Canadian Journal ofCivil Engineering,2004,31:16-24.
[11]方志,梁栋,蒋田勇.不同粘结介质中CFRP筋锚固性能的试验研究[J].土木工程学报,2006,39(6):47-51.FANG Zhi,LIANG Dong,JIANG Tian-yong.Experi-mental Investigation on the Anchorage Performanceof CFRP Tendon in Different Bond Mediums[J].China Civil Engineering Journal,2006,39(6):47-51.
[12]ELREFAI A,WEST J S,SOUDKI K.Performance ofCFRP Tendon-anchor Assembly Under Fatigue Load-ing[J].Composite Structures,2007,80(3):352-360.
[13]诸葛萍,强士中.新型CFRP筋夹片式锚具理论与试验研发[J].土木工程学报,2011,44(10):67-72.ZHUGE Ping,QIANG Shi-zhong.Theoretical andExperimental Investigation of a New CFRP TendonWedge-anchor[J].China Civil Engineering Journal,2011,44(10):67-72.
[14]蒋田勇,方志.CFRP筋复合式锚具锚固性能的试验研究[J].土木工程学报,2010,43(2):79-87.JIANG Tian-yong,FANG Zhi.Experimental Investi-gation on the Performance of Wedge-bond Anchorsfor CFRP Tendons[J].China Civil Engineering Jour-nal,2010,43(2):79-87.
[15]詹界东,杜修力,王作虎.CFRP筋夹片-黏结型锚具的研制[J].北京工业大学学报,2011,37(3):418-424.ZHAN Jie-dong,DU Xiu-li,WANG Zuo-hu.Wedge-bond Anchorage of CFRP Tendons[J].Journal of Bei-jing University of Technology,2011,37(3):418-424.
[16]王军,李明君,蔡东升,等.CFRP筋复合型锚具的受力性能试验[J].江苏大学学报:自然科学版,2012,33(6):726-729.WANG Jun,LI Ming-jun,CAI Dong-sheng,et al.Me-chanical Behavior Experiment of Wedge-bond An-chorage for CFRP-tendons[J].Journal of JiangsuUniversity:Natural Science Edition,2012,33(6):726-729.
[17]JGJ85—2002,预应力筋用锚具、夹具和连接器应用技术规程[S].JGJ 85—2002,Technical Specification for Applicationof Anchorage,Grip and Coupler for Prestressing Ten-dons[S].
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