植筋系统粘结滑移性能及受力机理研究
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摘要
化学植筋及螺杆,简称植筋,是我国工程界广泛应用的一种后锚固连接技术,系以化学胶粘剂——锚固胶,将带肋钢筋及长螺杆胶结固定于混凝土基材钻孔中,通过粘结与锁键作用,以实现对被连接件锚固的一种组件。化学植筋的破坏模式可分为胶筋界面拔出破坏、胶混界面拔出破坏、混合型拔出破坏三种类型。
目前对植筋的研究大多是以工程应用为目的,对植筋受力机理的研究较少;在工程实践中对植筋的质量检验仅限于承载力的检验,而对达到正常使用极限状态下植筋滑移量的控制无明确规定,技术研究中亦对植筋的粘结滑移性能关注较少;在实际工程中植筋大量的在受弯构件或压弯构件中承受拉力,而植筋试验研究集中在拉拔试验方面,对于基材处于复杂应力状态下对植筋系统的粘结滑移性能及受力机理的影响研究较少。植筋技术现已广泛被采用,急需对其进行系统深入地研究。
本课题对金属套筒植筋拉拔系统进行考虑粘结滑移的有限元分析,探索了考虑双重界面滑移的受力机理分析方法,说明了按单层界面滑移近似分析植筋系统的可行性;对金属套筒拉拔植筋系统和混凝土块体约束拉拔植筋系统进行了考虑粘结滑移的有限元分析,全面认识了胶筋界面拔出型破坏植筋系统的粘结滑移性能及其受力机理;对自由拉拔植筋系统进行了考虑粘结滑移有限元分析,全面认识了混合界面拔出型破坏植筋系统的粘结滑移性能及其受力机理;对植筋搭接梁系统进行了考虑粘结滑移的有限元分析,初步认识了植筋搭接构件系统的粘结滑移性能及其受力机理。最后根据受力机理,得到各种破坏类型下的承载能力极限状态和正常使用极限状态下的锚固长度设计计算公式。
The chemically bonded rebar technique which is the topic of this research, as a means of post-installed fastenings technology is extensively applied in engineering. This technique can be showed by the following steps: first, drill a hole in the concrete base material; then, put the adhesive in the hole; then, insert the rebar into the hole; finally, the rebar is fastened by the bond of adhesive-rebar-interface and adhesive-concrete-interface.
Currently, most of the research of chemically bonded rebar technique is taken the project application as the target, but the research of bond mechanics is deficient. In the practice, the examinations on the quality of the bonded rebar are limited to the ultimate carrying capacity. While there are not definite rules to the control of the bond-slide of the bonded rebar under the limit state of serviceability, that is, there is little study on the bond-slide of the chemically bonded rebar. In the practical engineering the bonded rebar is widely used in flexural member or comprehensive-flexural member, but the research is focused on the pull-out test. Chemically bonded rebar technique that is widely applied in engineering is urgently needed system thoroughly study.
In this paper, the bonded rebars systems of steel tube and confined concrete block and unconfined concrete block are studied by the FE analysis based on the ANSYS program considering slip of interface. According to the analysis results, the load transfer mechanism of bonded rebars failed on steel-adhesive interface and failed on combination interface are understood.Also, the bonded rebars system of concrete beam with adhesive reinforcement is studied. Finally, the design and calculation formulas in bear capacity limit condition and normal limit condition of the bonded rebars system are formed.
目前对植筋的研究大多是以工程应用为目的,对植筋受力机理的研究较少;在工程实践中对植筋的质量检验仅限于承载力的检验,而对达到正常使用极限状态下植筋滑移量的控制无明确规定,技术研究中亦对植筋的粘结滑移性能关注较少;在实际工程中植筋大量的在受弯构件或压弯构件中承受拉力,而植筋试验研究集中在拉拔试验方面,对于基材处于复杂应力状态下对植筋系统的粘结滑移性能及受力机理的影响研究较少。植筋技术现已广泛被采用,急需对其进行系统深入地研究。
本课题对金属套筒植筋拉拔系统进行考虑粘结滑移的有限元分析,探索了考虑双重界面滑移的受力机理分析方法,说明了按单层界面滑移近似分析植筋系统的可行性;对金属套筒拉拔植筋系统和混凝土块体约束拉拔植筋系统进行了考虑粘结滑移的有限元分析,全面认识了胶筋界面拔出型破坏植筋系统的粘结滑移性能及其受力机理;对自由拉拔植筋系统进行了考虑粘结滑移有限元分析,全面认识了混合界面拔出型破坏植筋系统的粘结滑移性能及其受力机理;对植筋搭接梁系统进行了考虑粘结滑移的有限元分析,初步认识了植筋搭接构件系统的粘结滑移性能及其受力机理。最后根据受力机理,得到各种破坏类型下的承载能力极限状态和正常使用极限状态下的锚固长度设计计算公式。
The chemically bonded rebar technique which is the topic of this research, as a means of post-installed fastenings technology is extensively applied in engineering. This technique can be showed by the following steps: first, drill a hole in the concrete base material; then, put the adhesive in the hole; then, insert the rebar into the hole; finally, the rebar is fastened by the bond of adhesive-rebar-interface and adhesive-concrete-interface.
Currently, most of the research of chemically bonded rebar technique is taken the project application as the target, but the research of bond mechanics is deficient. In the practice, the examinations on the quality of the bonded rebar are limited to the ultimate carrying capacity. While there are not definite rules to the control of the bond-slide of the bonded rebar under the limit state of serviceability, that is, there is little study on the bond-slide of the chemically bonded rebar. In the practical engineering the bonded rebar is widely used in flexural member or comprehensive-flexural member, but the research is focused on the pull-out test. Chemically bonded rebar technique that is widely applied in engineering is urgently needed system thoroughly study.
In this paper, the bonded rebars systems of steel tube and confined concrete block and unconfined concrete block are studied by the FE analysis based on the ANSYS program considering slip of interface. According to the analysis results, the load transfer mechanism of bonded rebars failed on steel-adhesive interface and failed on combination interface are understood.Also, the bonded rebars system of concrete beam with adhesive reinforcement is studied. Finally, the design and calculation formulas in bear capacity limit condition and normal limit condition of the bonded rebars system are formed.
引文
[1]《欧洲技术指南——混凝土用(金属)锚栓》(ETAG)
[2]张建荣.多重介质间的粘结机理及植筋锚固受力性能的研究:[博士学位论文].上海:同济大学土木工程学院,2003
[3]张建荣,石丽忠,吴进,张欣,张孟威.植筋锚固拉拔试验研究及破坏机理研究[J].结构工程师,2004,20(5),47-51
[4]张建荣,石丽忠,杨建华,吴进,张欣,张孟威.混凝土化学植筋锚固性能的试验研究[J].建筑结构,2006,36(3),17-21
[5]熊学玉、许立新、胡家智.化学植筋的拉拔试验研究.建筑技术,1999,31(6)
[6]杨秉钧,张洪章.喜利得植筋技术在设计修改工程中的应用.建筑技术;2001年第十一期
[7]王天稳.建筑结构胶生筋技术及应用.建筑技术开发;1999年第26卷一4
[8]张建荣;黎群;吴进;宋磊;刘兵;舒睿彬.FISEM390植筋搭接混凝土梁受弯试验[J].建筑结构第36卷增刊,Vol.36(S1),2006,36
[9]萧雯,黎群,张建荣,吴进,舒睿彬.植筋搭接混凝土梁的试验研究[J].工程加固,2006,1,4-9
[10]张建荣,舒睿彬,萧雯,杨建华,黎群.植筋搭接混凝土梁粘结性能的试验研究[J].工业建筑,2007增刊
[11]Ronald A.Cook,Member,ASCE.Behavior of Chemically Bonded Anchors[J].Journal of Structural Engineering,September,1993,119(9),2744-2762
[12]Cook,Ronald A./Kunz,J./Fuchs,W./Konz,R.:Behavior and Design of Single Adhesive Anchors under Tensile Load in Uncracked Concrete.ACI Structural Journal,Vol.95,No.1,January-February 1998,pp.9-26
[13]Cannon,R.W.,Godfrey,D.A.,and Moreadith,F.L.(1981)."Guide to the design of anchor bolts and other steel embedments." Concrete Int.,3(7)
[14]Comite Euro-International du Beton(CEB)rep.no.206."Fastenings to reinforced masonry concrete masonry and masonry structures."(1991).Comite Euro-International du Beton,Lausanne,Switzerland
[15]Collins,D.M.,Cook,R.A.,Klingner,R.E.,and Polyzois,D.(1989)."Load-deflection behavior of cast-in-place and retrofit concrete anchors subjected to static,fatigue,and impact tensile loads." Res.rep.no.1126-1,Center for Transportation Res.,Univ.of Texas,Austin,Texas
[16]Cook,R.A.,Fagundo,F.E.,Biller,M.H.,and Richardson,D.E.(1991)."Tensile behavior and design of single adhesive anchors." Structures and materials res.rep.no.91-3,Univ.of Florida,Gainesville,Fla
[17]Doerr,G.T.,Cook,R.A.,and Klingner,R.E.(1989)."Adhesive anchors:behavior and spacing requirements." Res.rep.no.1126-2,Ctr.For Transp.Res.,Univ.of Texas,Austin,Tex
[18]Eligehausen,R.,Mallee,R..,and Rehm,G..(1984a)."Befestigungen mit Yerbundankern(Fastenings with Bonded Anchors)." Betonwerk +Fertigteil-Technik,10,686-692(in German and English)
[19]Eligehausen,R.,Mallee,R.,and Rehm,G.(198c)."Befestigungen mit Verbundankern(Fastenings with Bonded Anchors)." Betonwerk +Fertigteil-Technik,12,825-829(in German and English)
[20]Luke,P.C.C.,Chon,C.,and Jirsa,J.O.(1985)."Use of epoxies for grouting reinforcing bar dowels concrete." PMFSEL report no.85-2,Phil M.Ferguson Structural Engineering Lab.,Dept.of Cir.Engrg.,Bureau of Engrg.Res.,The Univ.of Texas,Austin,Tex
[21]Rehm,G.,Eligehausen,R.,and Mallee,R.(1988)."Befestigungstechnik."Beton-kalender(Berlin),2,564-663
[22]江见鲸.钢筋混凝土结构非线性有限元分析.陕西:陕西科学技术出版社,1994
[23]郝文化.ANSYS土木工程应用实例.中国水利水电出版社,2004
[24]Michael McCay,Ronald A.Cook,Kailash Krishnamurthy.Pullout simulation of post-installed chemically bonded anchors[J].Journal of Structural Engineering,September,1996,122(9),1016-1024
[25]杨勇,薛建阳,赵鸿铁.考虑粘结滑移的型钢混凝土结构ANSYS模拟方法研究[J].结构工程师,2006,22(3),72—75
[26]张建荣,黄河军,吴进,宋磊,郭晓飞.植筋胶拉伸抗剪本构关系的研究[J].结构工程师,2006,22(3),72—75
[27]黄河军,张建荣,吴进,宋磊,张志燕.结构胶粘剂金属套筒粘结试验研究[J].莱阳农学院学报(自然科学版),2006,23(3),220—224
[28]中华人民共和国国家标准.混凝土结构加固设计规范.GB50367—2006.2006
[29]中华人民共和国行业标准.混凝土结构后锚固技术规程.JGJ 145—2004.2004
[30]刘慧林,刘有军.化学植筋技术原理及其实验研究[J].国外建材科技,2006,27(1),67—70
[31]张建荣,黄河军,吴进,宋磊.植筋界面结合机理试验研究[J](已被《建筑结构》录用)
[32]Discussion by James M.Doyle.Behavior of Chemically Bonded Anchors[J].Journal of Structural Engineering,September,1993,119(9),2744-2762
[33]赵更歧.植筋粘结锚固性能的试验研究:[硕士学位论文].郑州:郑州大学,2001
[2]张建荣.多重介质间的粘结机理及植筋锚固受力性能的研究:[博士学位论文].上海:同济大学土木工程学院,2003
[3]张建荣,石丽忠,吴进,张欣,张孟威.植筋锚固拉拔试验研究及破坏机理研究[J].结构工程师,2004,20(5),47-51
[4]张建荣,石丽忠,杨建华,吴进,张欣,张孟威.混凝土化学植筋锚固性能的试验研究[J].建筑结构,2006,36(3),17-21
[5]熊学玉、许立新、胡家智.化学植筋的拉拔试验研究.建筑技术,1999,31(6)
[6]杨秉钧,张洪章.喜利得植筋技术在设计修改工程中的应用.建筑技术;2001年第十一期
[7]王天稳.建筑结构胶生筋技术及应用.建筑技术开发;1999年第26卷一4
[8]张建荣;黎群;吴进;宋磊;刘兵;舒睿彬.FISEM390植筋搭接混凝土梁受弯试验[J].建筑结构第36卷增刊,Vol.36(S1),2006,36
[9]萧雯,黎群,张建荣,吴进,舒睿彬.植筋搭接混凝土梁的试验研究[J].工程加固,2006,1,4-9
[10]张建荣,舒睿彬,萧雯,杨建华,黎群.植筋搭接混凝土梁粘结性能的试验研究[J].工业建筑,2007增刊
[11]Ronald A.Cook,Member,ASCE.Behavior of Chemically Bonded Anchors[J].Journal of Structural Engineering,September,1993,119(9),2744-2762
[12]Cook,Ronald A./Kunz,J./Fuchs,W./Konz,R.:Behavior and Design of Single Adhesive Anchors under Tensile Load in Uncracked Concrete.ACI Structural Journal,Vol.95,No.1,January-February 1998,pp.9-26
[13]Cannon,R.W.,Godfrey,D.A.,and Moreadith,F.L.(1981)."Guide to the design of anchor bolts and other steel embedments." Concrete Int.,3(7)
[14]Comite Euro-International du Beton(CEB)rep.no.206."Fastenings to reinforced masonry concrete masonry and masonry structures."(1991).Comite Euro-International du Beton,Lausanne,Switzerland
[15]Collins,D.M.,Cook,R.A.,Klingner,R.E.,and Polyzois,D.(1989)."Load-deflection behavior of cast-in-place and retrofit concrete anchors subjected to static,fatigue,and impact tensile loads." Res.rep.no.1126-1,Center for Transportation Res.,Univ.of Texas,Austin,Texas
[16]Cook,R.A.,Fagundo,F.E.,Biller,M.H.,and Richardson,D.E.(1991)."Tensile behavior and design of single adhesive anchors." Structures and materials res.rep.no.91-3,Univ.of Florida,Gainesville,Fla
[17]Doerr,G.T.,Cook,R.A.,and Klingner,R.E.(1989)."Adhesive anchors:behavior and spacing requirements." Res.rep.no.1126-2,Ctr.For Transp.Res.,Univ.of Texas,Austin,Tex
[18]Eligehausen,R.,Mallee,R..,and Rehm,G..(1984a)."Befestigungen mit Yerbundankern(Fastenings with Bonded Anchors)." Betonwerk +Fertigteil-Technik,10,686-692(in German and English)
[19]Eligehausen,R.,Mallee,R.,and Rehm,G.(198c)."Befestigungen mit Verbundankern(Fastenings with Bonded Anchors)." Betonwerk +Fertigteil-Technik,12,825-829(in German and English)
[20]Luke,P.C.C.,Chon,C.,and Jirsa,J.O.(1985)."Use of epoxies for grouting reinforcing bar dowels concrete." PMFSEL report no.85-2,Phil M.Ferguson Structural Engineering Lab.,Dept.of Cir.Engrg.,Bureau of Engrg.Res.,The Univ.of Texas,Austin,Tex
[21]Rehm,G.,Eligehausen,R.,and Mallee,R.(1988)."Befestigungstechnik."Beton-kalender(Berlin),2,564-663
[22]江见鲸.钢筋混凝土结构非线性有限元分析.陕西:陕西科学技术出版社,1994
[23]郝文化.ANSYS土木工程应用实例.中国水利水电出版社,2004
[24]Michael McCay,Ronald A.Cook,Kailash Krishnamurthy.Pullout simulation of post-installed chemically bonded anchors[J].Journal of Structural Engineering,September,1996,122(9),1016-1024
[25]杨勇,薛建阳,赵鸿铁.考虑粘结滑移的型钢混凝土结构ANSYS模拟方法研究[J].结构工程师,2006,22(3),72—75
[26]张建荣,黄河军,吴进,宋磊,郭晓飞.植筋胶拉伸抗剪本构关系的研究[J].结构工程师,2006,22(3),72—75
[27]黄河军,张建荣,吴进,宋磊,张志燕.结构胶粘剂金属套筒粘结试验研究[J].莱阳农学院学报(自然科学版),2006,23(3),220—224
[28]中华人民共和国国家标准.混凝土结构加固设计规范.GB50367—2006.2006
[29]中华人民共和国行业标准.混凝土结构后锚固技术规程.JGJ 145—2004.2004
[30]刘慧林,刘有军.化学植筋技术原理及其实验研究[J].国外建材科技,2006,27(1),67—70
[31]张建荣,黄河军,吴进,宋磊.植筋界面结合机理试验研究[J](已被《建筑结构》录用)
[32]Discussion by James M.Doyle.Behavior of Chemically Bonded Anchors[J].Journal of Structural Engineering,September,1993,119(9),2744-2762
[33]赵更歧.植筋粘结锚固性能的试验研究:[硕士学位论文].郑州:郑州大学,2001