摘要
钢筋混凝土T型梁是我国公路上应用最为广泛的上部结构形式,但是该桥型现在面临不同程度的缺陷和各种各样的病害,有必要针对性的确定合理的危旧桥梁处置对策。碳纤维片材加固方法作为一种新兴的加固技术,由于可以有效地提高T型梁桥的承载能力以及其自身的独特优点而深受重视,并得到了较为广泛的应用,但是在我国公路桥梁工程上的应用起步较晚,加固规范编制比较滞后。因此,开展碳纤维片材加固T型桥梁的设计计算方法研究是非常必要的。
本文作为我国正在编制的《公路桥梁加固技术规范》的一个组成部分,根据目前已有规范及规程的钢筋混凝土矩形梁正截面加固计算方法,结合钢筋混凝土T梁桥的结构特点和现行《公桥规》的相关规定,推导出相应的加固公路钢筋混凝土双筋T型梁的极限抗弯能力计算公式;通过收集整理的7片T型模型梁的试验数据,对相关国家、地区推荐公式进行误差对比分析后表明,我国台湾规范应用于我国钢筋混凝土T型梁桥最为准确,并对其计算公式提出了安全修正系数φ_f,;其次,本文收集了国内外比较常用的9种斜截面加固极限抗剪能力计算方法,通过49片试验梁的试验数据,对斜截面加固方法进行了分析对比,得出陈.腾斜截面加固公式最为精确;最后,本文将推荐的正截面、斜截面加固公式应用于实体工程,并对其进行了全过程的正截面、斜截面加固设计及验算,结果合理可行。
本文成果可供同类公路桥梁加固设计计算参考。
The reinforced concrete T beam bridge is the most widespread superstructure form on our country road applies, But these bridges now faced with varying degree flaw and various plant disease, It is necessary to determine the reasonable handling countermeasure for old danger bridge.by way of practice, The strengthening method using CFRP may enhance the load carrying capacity of T-beam bridge effectively, and Improves its operation situation. Therefore, As a new reinforcement technology, CFRP reinforcement technology is developed later in our country highway bridge project application start, Reinforcement standard establishment comparison lag. Launches the computational method research of CFRP reinforcement technology is extremely essential.
As our country standard" Code for strengthening highway bridge" constituent which establishes, According to the already existed right section strengthening computational method in standard of RC rectangular beam, Unifies the unique feature of strengthening the reinforced concrete T-beam bridge with CFRP and the stipulation in standard correlation, this paper infers corresponding strengthening limit bending strength capacity rating formula of the reinforced concrete double muscle T-beam; Through the collected 7 piece of T-beam experiments tentative data, Carries on the erroneous contrast analysis to the correlated country and the local recommended formula, indicate that The Taiwan standard applies in the reinforced concrete T-beam bridge is most accurate, In addition, this text proposed thesafe adjustment factorφ_f for The Taiwan standard. Secondly, This article collected thedomestic and foreign quite commonly used 9 kinds of computing method of oblique section reinforcement limit anti-to cut the capacity, Through the collected 49 pieces of experiments tentative data, Carried on the contrast analysis to the oblique section reinforcement method, Obtains that the reinforcement formula of Chen&Teng is most precise; Finally, This article apply the reinforcement formula which was recommended in the entity project, and carried on the entire process reinforcement design and check of right section and the oblique section for it, The result indicates that the recommended reinforcement formula is reasonably and feasible.
This article achievement may be the supply the similar highway bridge reinforcement design calculation reference.
引文
[1]刘来君,赵小星,桥梁加固设计施工技术[M],北京,人民交通出版社,2004
[2]姚玲森,桥梁工程[M],北京,人民交通出版社,1988
[3]张有才,段敬民,建筑物的检测、鉴定、加固与改造[M],北京,冶金工业出版社1997
[4]交通部公路规划设计院,公路钢筋混凝土及预应力混凝土桥涵设计规范(JTGD62-2004).2004
[5]四川省建筑科学研究院,混凝土结构加固设计规范GB50367-2006,2006
[6]中国工程建设标准化协会标准,碳纤维布加固修复混凝土结构技术规程,2002
[7]中国工程建设标准化协会标准,混凝土结构加固技术规范CECS25:90,1990
[8]中国台湾台北大学,CFRP补强混凝土结构物技术规范,2004
[9]公路旧桥加固技术与实例,谌润水,胡钊芳,帅长斌,人民交通出版社,2003
[10]赵丹,谢剑著,碳纤维布补强加固混凝土结构新技术,天津:天津大学出版社
[11]日本建设省土木研究所,碳素纤维布粘贴公法参考资料(桥梁编),2002
[12]任伟,钢筋混凝土T梁桥的片材加固机理、设计方法及其应用,长安大学博士学位论文
[13]曹双寅,邱洪兴,王恒华.结构可靠性鉴定与加固技术[M].北京:中国水利水电出版社,2001
[14]高作平,陈明样,混凝土结构粘贴加固技术新进展[M].北京:中国水利水电出版社,1999
[15]中国工程建设标准化协会标准,混凝土结构加固技术规范.北京:中国计划出版社,1992
[16]吴智深,FRP复合材料在基础工程设施的增强和加固方面的现状与发展,中国纤维增强塑料(FRP)混凝土结构学术交流会论文集,北京.2000.6 pp5-20
[17]ACI Committee 440-F.Guide for the Design and Construction of externally Bonded FRP Systems for Strengthening Concrete Structures.Detroit,Michigan:American Concrete Institute,2000
[18]Sherif Ei-Tawil,Ayman M.LRFD flexural provision for prestressed concrete bridge girders strengthened with carbon fiber-reinforced polymer laminates.ACI Structural Journal,2002,99(2):181-189
[19]Kenneth W.Neale.FRPs for Structural Rehabilitation in Canada.第二届全国土木工程用 纤维增强复合材料(FRP)应用技术学术交流会论文集.昆明.2002.7 pp3-11
[20]Bakht Baidar,Al-Bazi George,Banthia Nemy,Cheung Moe,Erki Marie-Anne,Faoro Martin,Machida Atsuhiko,Mufti Aftab A.,Neale Kenneth W,Tadros Gamil.Canadian Bridge Design Code Provisions for Fiber-Reinforced Structures.Journal of Composites for Construction,2000,4(1):3-15
[21]李宏男,赵颖华,黄承逵.纤维增强复合材料在土木工程中的研究与应用,第二届全国土木工程用纤维增强复合材料(FRP)应用技术学术交流会论文集.昆明.2002.7pp43-50
[22]岳清瑞,我国碳纤维(CFRP)加固修复技术研究应用现状与展望[J].工业建筑,2000,30(10):23-26
[23]岳清瑞,陈小兵,牟宏远.碳纤维材料(CFRP)加固修补混凝土结构新技术[J].工业建筑,1998,28(11):1-5
[24]卢小雨,马芹永,王长柏.外国碳纤维加固补强结构的研究现状及展望.福建建筑.2006
[25]Grace Nabil F,Abdel-Sayed George,Ragheb,Wael F.Strengthening of concrete beams using innovative ductile fiber-reinforced polymer fabric.ACI Structural Journal,2002,99(5):692-700
[26]Norris,T,Saadatmanesh,H.Shear and flexural strengthening of RC beams with carbon fiber sheets.Journal of Structural Engineering,1997,123(7):903-911
[27]Tedesco Joseph W,Stallings J.Michael El-Mihilmy Mahmoud.Finite element method analysis of a concrete bridge repaired with fiber reinforced plastic laminates.Computers&Structure,72(1-3):379-40
[28]Garden H.N,Rollaway L.C,An experimental study of the influence of plate end anchorage of carbon fiber composite plates used to strengthen reinforced concrete beams.Composite Structures,42(2):175-Ⅰ88
[29]Limam Oualid,Foret Gilles,Ehrlacher Alain.RC beams strengthened with composite material;a limit analysis approach and experimental study.Composite Structures.2003,59(4):467-472
[30]Shahawy Mohsen,Beitelman Thomas E.Static and Fatigue Performance of RC Beams Strengthened With CFRP Laminates.Journal of Structural Engineering,1999,125(6):613-621
[31]Spadea G.,Bencardino,F,Swamy,R.N.Structural Behavior of Composite RC Beams with Externally Bonded CFRP.Journal of Composites for Construction,2(3):132-137
[32]Rahimi Hamid,Hutchinson Allan.Concrete Beams Strengthened with Externally Bonded FRP Plates Journal of Composites for Construction,S(1):44-56
[33]Shahawy M.A,Arockiasamy,M,Sowrirajan,and R.Reinforced concrete rectangular beams strengthened with CFRP laminates.Composites Part B:Engineering,27(3-4):225-233
[34]Kachlakev D,McCurry,D.D.Behavior of full-scale reinforced concrete beams retrofitted for shear and flexural with FRP laminates.Composites Part B:Engineering,31(6-7):445-452
[35]Wang Y.C,Restrepo J.I.Response of RC T-beams strengthened for flexure with staggered CFRP plates.Journal of Composites for Construction,5(:3):188-199
[36]Grace,N.F,Saved,G.A,Saleh,K.R,Soliman,A.K.Strengthening reinforced concrete beams using fiber reinforced polymer(FRP) laminates.ACI Structural Journal,96(5):865-874
[37]Okeil,Ayman M,El-Tawil Sherif,Shahawy,Mohsen.Short-term tensile strength of carbon fiber-reinforced polymer laminates for flexural strengthening of concrete girders.ACI Structural Journal,2001,98(4):470-478
[38]Fanning P.J,Kelly O.Ultimate response of RC beams strengthened with CFRP plates.Journal of Composites for Construction,5(2):122-127
[39]Smith S.T,Teng J.G FRP-strengthened RC beams.Ⅱ:Assessment of debonding strength models.Engineering Structures,24(4):397-417
[40]Almusallam T.H,Al-Salloum,Y.A.Ultimate strength prediction for RC beams externally strengthened by composite materials.Composites Part B:Engineering,32(7):609-619
[41]Baluch,M.H,et al Fatigue Performance of Concrete Beams Strengthened with CFRP Plates.Journal of Composites for Construction,4(4):215-224
[42]叶列平等,碳纤维布加固钢筋混凝土板二次受力性能的试验研究,中国纤维增强塑料(FRP)混凝土结构学术交流会论文集.北京.2000.6 pp83-91
[43]吴刚,安琳,吕志涛,碳纤维布用于钢筋混凝土梁抗弯加固的试验研究与分析,中国纤维增强塑料(FRP)混凝土结构学术交流会论文集.北京.2000.6,pp151-156
[44]陈宽诚等,碳纤维织物用于混凝土梁抗弯加固试验研究,中国纤维增强塑料(FRP) 混凝土结构学术交流会论文集,北京,2000.6,pp189-193
[45]聂肃非,徐德新,碳纤维布、钢板加固与碳纤维布加固钢筋混凝土梁的抗弯性能试验研究.第二届全国土木工程用纤维增强复合材料(FRP)应用技术学术交流会论文集,昆明,2002.7pp169-175
[46]非渭等,预应力碳纤维布加固混凝土受弯构件试验研究,第二届全国土木工程用纤维增强复合材料(FRP)应用技术学术交流会论文集,昆明.2002.7 pp280-287
[47]徐芸等,碳纤维板加固梁一次受力和二次受力的试验研究,第二届全国土木工程用纤维增强复合材料(FRP)应用技术学术交流会论文集,昆明.2002.7 pp329-332
[48]邓宗才,碳纤维布增强钢筋混凝土梁抗弯力学性能研究,中国公路学报,(C):46-51
[49]熊光晶,姜浩,黄冀卓,混杂纤维布加固混凝土梁的试验研究,土木工程学报,(4):62-66
[50]Shahawy Mohsen.Chaallal Oman.Beitelman Thomas E,El-Saad Adnan.Flexural strengthening with carbon fiber-reinforced polymer composites of preloaded full-scale girders.ACI Structural Journal,2001,98(5):735-742
[51]李松辉,碳纤维布加固桥梁的设计理论研究博士[D].大连:大连理工大学,2003
[52]王文炜,纤维复合材料加固钢筋混凝土梁抗弯性能研究[D].大连:大连理工大学,2003
[53]丁大钧,钢筋混凝土构件抗裂度、裂缝和刚度.南京工学院出版社,1986
[54]郝震,外贴碳纤维CFRP加固梁斜截面受力性能的实验研究[D].南京:东南大学,2004
[55]周英武,王苏岩,FRP加固钢筋混凝土梁抗剪计算公式的对比分析,铁道科学与工程学报,2005.6
[56]Deniaud C.Roger Cheng J.Shear behavior of reinforced concrete T-beams with externally bonded fiber-reinforced polymer sheets[J].ACI Structural Journal.2001.98(3):386-394
[57]Triantafillou T C,Shear strengthening of reinforced concrete beams using epoxy-bonded FRP composites,ACI Structural Journal,1998,95(2):107-115
[58]Al-Nahlawi G J,Wight J K,Beam ananlysis using concrete tensile strength in truss in models[J],ACI Structural Journal,1992,89;284-289
[59]Hsu T T.Unified theory of reinforced concrete[M].CRC Press,1993
[60]Collins M P.Toward a rational theory for RC members in shear[J],Journal of the Structural Division ASCF,1998,124(12);1375-1417
[61]Veechio F J,Collins M P.The modified compression-filed theory for reinforced concrete elements subjected sheets [J].ACI Structural Journal. 1986.83 (3):386-394
[62] Deniaud C, Roger Cheng J, Review of shear design methods for reinforced concrete beams strengened with fiber reinforced polymer sheets [J].Can J Eng, 2001, 28; 271-281
[63] Berset J D, Strengthening of Reinforced Concrete Beams for Shear Using FRP Composites, MSc, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 1992
[64] Uji, K. etc., Improving Shear Capacity of Existing Reinforced Concrete Members by Applying Carbon Fiber Sheets, Transactions of the Japan Concrete Institute, 1992,14:253-266
[65] Sato, Y etc., Shear Reinforcing Effect of Carbon Fiber Sheet Attached to Side of Reinforced Concrete Beams, Advanced Composite Materials in Bridges and Structures,1996, 621-627
[66] Al-Sulaimani, Cx.J. etc., Shear Repair for Reinforced Concrete by Fiberglass Plate Bonding,ACI Structural Journal, 1994, 91(3): 458-464
[67] Ohuchi H, Ohno S, Katsumata H, et al. Seismic strengthening design technique for existing bridge columns with CFRP[M]. Seismic Design and Retrofitting of Reinforced Concrete Bridge, 1994.495-514
[68] Chajes, M.J. etc., Shear Strengthening of Reinforced Concrete Beams Using Externally Applied Composite Fabrics, ACI Structural Journal, 1995, 92(3): 295-303
[69] Chaallal O, Nollet M J, Perraton D. Strengthening of Reinforced Concrete Beams with externally bonded fibre- Reinforced-plastic plate [J]. Can J Eng, 1998, 25(4); 692-704
[70] Triantafillou and Antonopoulos, Design of concrete flexural members strengthened in shear with FRP- ASCE Journal of Composite for Construction, 2000, 4(4): 198-205
[71] Khalifa Ahmed, etc., Contribution of Externally Bonded FRP to Shear Capacity of RC Flexural Members, Journal of Composite for Construction, ASCE, 1998, 2(4):195-202
[72] Khalifa A, Nanni A.Improving Shear Capacity of excisting RC T-section beams using CFRP Composites [J]. Cement&Concrete Composites.2002.22; 165-174
[73] Khalifa A, Nanni A.Rehabihition of rectangular simply supported RC beams with shear deficiencies using CFRP [J]. Construction and Building Materials, 2002, 16:135-146
[74] P C, M C, Fibre Reinforced polymer Shear Strengthening of Reinforced Concrete beams with transverse steel reinforcement[J].Journal of Composites for Construction , 2002,6(3): 104-111
[75] J.F. Chen and J.Cx. Teng, Shear Construction and Building Materials, Capacity of FRP-Strengthened RC beams: FRP Debonding, 2003, 17:27-41
[76] Fib externally bonded FRP reinforcement for RC structures, in: Builletin 14, 2001, 43-45
[77] Committee Concrete Society, Design guidance for strengthening concrete structures using fiber Composites materials, in: Technical Report NO.55., Century House, Telford Avenue, Crowthorne, Berkshire RG45 6YS, UK, 2000, 40-42
[78] Canada ISIS, Strengthening reinforced concrete structures with externally bonded polymers, in: Design Manual NO4.227 Engineering Building, University of Manitoba,Winnipeg, Manitoba, R3T 5V6, 2001, 33-38
[79] Yang Xinbao, Antonio Nanni et al. Strength and modulus degradation of carbon fiber reinforced polymer laminates from fiber misalignment. Journal of materials in civil engineering, 202, and 14 (4):320-326
[80] Tom Norris, Hamid Saadatmanesh and Mohammad R. Ehsani. Shear and Flexural Strengthening of R/C Beams with Carbon Fiber Sheets [J]. Journal of Structural Engineering. 1997,123(7):903 -911
[81] 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
[82] Alfarabi Sharif, G. J. Al-Sulaimani, I. A. Basunbu, M. H. Baluch, and B.N, Ghaleb.Strengthening of Initially Loaded Reinforced Concrete Beams Using FRP Plates [J] ACI Structural Journal. 1994, 91(2): 160-168.
[83] Mohsen Shahawy, Omar Chaalal, Thomas E.Beitelman, and Adnan El — Saad. Flexural Strengthening with Carbon Fiber-Reinforced Full-Scale Girders [J] ACI Structural Journal .2001,98 (5): 735 — 743
[84] Meier U, Strengthening of Structures Using Carbon Fiber Epoxy Composites.Construction and Building Materails, 1995, 9(6)
[85] Meier U and Kaiser H. Strengthening of Structures with CFRP Laminates. In Advanced Composite Materials in Civil Engineering Structures, Proceeding of the Specialty Conference, Las Vegas, Nev., January 31 - Februaryl, ASCE, New York.
[86] Nanni A. Flexural Behavior and Design of RC Members Using FRP Reinforcement. Journal of Structure Engineering,ASCE,1993,119(11)
[87]Marco A.Parametric Study of Beams with Externally Bonded FRP Reinforcement,ACI Structure Journal.I997,94(5):493-551
[88]Ritchie P A,Thomas D A,Lu LW et al.External Reinforced of Concrete Beams Using Fiber Reinforced Plastics.ACI Structural Journal.199Ⅰ,
[89]An W,et al,RC Beams Strengthened with FRP Plates Ⅱ:Analysis and Parametric Study.Journal of Structure Engineering,ASCE,1991,117(11)
[90]Deskovic N,Triantafillou T C,Innovative Design of FRP Combined with Concrete Short-Term.Behavior.Journal of Structural Engineering,ASCE,1995,121(7)
[91]GangaRao H V,Vijay P V.Bending Behavior of Concrete Beams Wrapped with Carbon Fabric.Journal of Structural Engineering,ASCE,1998,124(1)
[92]Ross C A,Jerome D M,Tedesco J Wet al.Strengthening of Reinforced Concrete Beams with Externally Bonded Composite Laminates.ACI Structural Journal.1999,96(2)
[93]Bonacci J F,Maale} M.Externally Bonded Fiber-Reinforced Polymer of Rehabilitation of Corrosion Damaged Concrete Beams.ACI Structural Journal.2000,97(4)
[94]EI-Mihilmy M T,Tedesco J W.Analysis of Reinforced Concrete Beams Strengthened with FRP Laminates.Journal of Structural Engineering,ASCE.2000,126(6)
[95]Malek A M,Saadatmanesh H.Analytical Study of Reinforced Concrete Beams Strengthened with Web-Bonded Fiber Reinforced Plastic Plates or Fabrics.ACI Structural Journal,1998,95(3)
[96]杨枚,碳纤维布加固高强钢筋混凝土梁抗弯性能研究[D].大连:大连理工大学,2005