多因素影响下FRP约束混凝土柱FRP有效极限拉应变研究进展

摘要/Abstract

摘要： FRP侧向约束作用使混凝土柱处于三向受压状态,可提高混凝土柱的抗压强度和延性。FRP有效极限拉应变是确定FRP侧向约束力的关键参数,对FRP约束混凝土轴压峰值应力和峰值应变计算模型、应力-应变模型的建立至关重要,其影响因素众多。目前国内外研究者在FRP有效极限拉应变取值方面取得了一些有价值的研究成果,但得到的FRP有效应变系数离散性较大,考虑的影响因素不全面。基于现有研究成果,对FRP有效极限拉应变的影响因素进行了系统分析,指出了当前FRP有效极限拉应变研究存在的不足和未来需深入研究的方向。

关键词: FRP, 混凝土, 侧向约束, 有效极限拉应变

Abstract: FRP confinement effects make concrete columns under the statement of triaxial compression,which improves the compressive strength and ductility of concrete columns. Effective ultimate tensile strain of FRP is essential for calculating the lateral restraint force, proposing peak stress models, peak strain models and stress-strain models of confined columns. In addition, the influence parameters are various. Researchers have obtained some meaningful but discrete and limited results on the effective ultimate tensile strain of FRP. In this paper, systematic analysis was conducted on various influence parameters based on the existing research results, and the remaining problems and key issues which need to be focused in future are pointed out.

Key words: FRP, concrete, lateral confinement, effective ultimate tensile strain

中图分类号:

TB332

欧阳利军,许峰. 多因素影响下FRP约束混凝土柱FRP有效极限拉应变研究进展[J]. 玻璃钢/复合材料, 2017, 0(10): 94-103.

OUYANG Li-jun, XU Feng. REVIEW ON THE EFFECTIVE ULTIMATE TENSILE STRAIN OF FRP FOR FRP-CONFINEDCONCRETE COLUMNS UNDER VARIOUS FACTORS[J]. Fiber Reinforced Plastics/Composites, 2017, 0(10): 94-103.

参考文献

[1] Lam L, Teng J G. Design-oriented stress-strain model for FRP-confined concrete[J]. Construction and Building Materials, 2003, 17(6): 471-489.
[2] 吴刚, 吴智深, 吕志涛. FRP约束混凝土圆柱有软化段时的应力-应变关系研究[J]. 土木工程学报, 2006, 39(11): 7-14.
[3] Yaqub M, Bailey C G. Repair of fire damaged circular reinforced concrete columns with FRP composites[J]. Construction and Building Materials, 2011, 25(1): 359-370.
[4] Ozbakkaloglu T, Jian C L, Vincent T. FRP-confined concretein circular sections: review and assessment of stress-strain models[J]. Engineering Structures, 2013, 49(2): 1068-1088.
[5] 欧阳利军,丁斌, 陆洲导, 等. 玄武岩纤维与碳纤维加固短柱抗震试验研究[J]. 同济大学学报(自然科学版), 2013, 41(2): 166-172.
[6] 崔宇强, 王作虎, 袁非凡. 反复荷载作用下FRP约束混凝土柱受压性能的研究综述[J]. 玻璃钢/复合材料, 2016(11): 100-106.
[7] Lignola G, Prota A, Manfredi G, et al. Unified theory for confinement of RC solid and hollow circular columns[J]. Composites Part B: Engineering, 2008, 39(7-8): 1151-1116.
[8] Xiao Y, Wu H. Compressive Behavior of concrete confinedby carbon fiber composite jackets[J]. Journal of Materials inCivil Engineering, 2000, 12(2): 139-146.
[9] Pessiki S, Harries K A, Kestner J T. Axial behavior of reinforced concrete columns confined with FRP Jackets[J]. Journal of Composites for Construction, 2001, 5(4): 237-245.
[10] 金熙男, 潘景龙, 刘广义, 等. 增强纤维约束混凝土轴压应力应变关系试验研究[J]. 建筑结构学报, 2003, 24(4):47-53.
[11] Harries K A, Carey S A. Shape and "gap" effects on the behavior of variably confined concrete[J]. Cement and Concrete Research, 2003, 33(6): 881-890.
[12] Tepfers R. Concrete cylinders confined by carbon FRP sheets, subjected to monotonic and cyclic axial compressive load[C]//The 6th International Symposium on fibre reinforced polymer (FRP) reinforcement for concretestructures (FRPRCS-6). Singapore: 2003: 571-580.
[13] Lam L, Teng J G. Ultimate condition of fiber reinforced polymer-confined concrete[J]. Journal of Composites for Construction, 2004, 8(6): 539-548.
[14] Take W A, Bisby L A. Strain localisations in FRP-confine concrete: new insights[J]. Structures and Buildings, 2009, 162(5): 301-309.
[15] Cui C. Behavior of normal and high strength concrete confined with fibre reinforced polymers (FRP)[J]. Biochimica Et Biophysica Acta, 2009, 123(2): 431-434.
[16] Smith ST, Kim SJ, Zhang HW. Behavior and effectiveness of FRP wrap in the confinement of large concrete cylinders[J]. Journal of Composites for Construction, 2010,14(5): 573-582.
[17] Wu Y F, Jiang J F. Effective strain of FRP for confined circular concrete columns[J]. Composite Structures, 2013, 95(1): 479-491.
[18] Lim J C, Ozbakkaloglu T. Confinement model for FRP-confined high-strength concrete[J]. Journal of Composites for Construction, 2014, 17(5): 1-19.
[19] Jian C L, Ozbakkaloglu T. Hoop strains in FRP-confined concrete columns: experimental observations[J]. Materials and Structures, 2015, 48(9): 2839-2854.
[20] Li S Q. FRP rupture strains in FRP wrapped columns[D]. University of Edinburgh, 2012.
[21] Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures: ACI 440.2R-08[S]. Farmington Hills: ACI Committee 440, 2008.
[22] Guide for the design and construction of externally bonded FRP systems for strengtheningexisting structures: CNR-DT 200/2004[S]. Rome: Italian National Research Council, 2004.
[23] 纤维增强复合材料建设工程应用技术规范: GB 50608—2010[S].北京:中国计划出版社, 2010.
[24] Chen J F, Ai J, Stratford T J. Effect of geometric discontinuities on strains in FRP-Wrappedcolumns[J]. Journal of Composites for Construction, 2010, 14(2): 136-145.
[25] Zinno A, Lignola G P, Prota A. Influence of free edge stress concentration on effectiveness of FRP confinement[J]. Composites Part B:Engineering, 2010, 41(7): 523-532.
[26] Chen J F, Li S Q, Bisby L A. FRP rupture strains in the split-disk test[J]. Composites Part B:Engineering, 2011, 42(4): 962-972.
[27] 结构加固修复用碳纤维片材: GB/T 21490—2008[S]. 北京: 中国标准出版社, 2008.
[28] Guide test methods for fiber-reinforced polymers (FRPs) for reinforcing or strengthening concrete structures: ACI 440.3R-08[S]. Farmington Hills: ACI Committee 440, 2008.
[29] Arya, C, Clark J L, Kay E A, et al. Design guidance for strengthening concrete structures using fibre composite materials[C]//Procs International Conference on Structural Engineering, Mechanics and Computation. South Africa, Cape Tow: 2001: 1243-1250.
[30] LorenzisD L, Tepfers R. Comparative study of models on confinement of concrete cylinders with fiber reinforced polymer composites[J]. Journal of Composites for Construction,2003, 7(3): 219-237.
[31] 过镇海. 常温和高温下混凝土材料和构件的力学性能[M]. 北京: 清华大学出版社, 2005.
[32] Standard test method for tensile properties of polymer matrix composite materials: D3039/D3039M[S].West Conshohocken: American Society for Testing and Materials (ASTM), 2008.
[33] Standard test method for apparent tensile strength of ring or tubular plastics and reinforced plastics by split disk method: D2290[S]. West Conshohocken: American Society for Testing and Materials(ASTM), 2008.
[34] Wang L M, Wu Y F. Effect of corner radius on the performance of CFRP-confined square concrete columns: Test[J]. Engineering Structures, 2008, 30(2): 493-505.
[35] Deng J. Integrity of the adhesive bonding in steel beams strengthened with a carbon fibre composite plate[D]. University of Southampton, 2005.
[36] Büyükztürk O, Yu T Y. Far-field radar NDT technique for detecting GFRP debonding from concrete[J]. Construction and Building Materials, 2009, 23(4): 1678-1689.
[37] TabbaraM, Karam G. Numerical investigation of failure localization and stress concentrations in FRP wrapped concrete cylinders[C]//The 5th International Conference on Advanced Composite Materials in Bridges and Structures. Canada, Winnipeg: 2008.
[38] Au C, Buyukozturk O. Effect of fiber orientation and ply mix on fiber reinforced polymer-confined concrete[J]. Journal of Composites for Construction, 2005, 9(5): 397-407.
[39] Vincent T, Ozbakkaloglu T. Influence of fiber orientation and specimen end condition on axial compressive behavior of FRP-confined concrete[J]. Construction and Building Materials, 2013(47): 814-826.
[40] Yu T, Teng J G, Chen J F. Failure criteria for FRP composites[M]. Thomas Telford, 2009.
[41] 鲁国昌, 叶列平, 杨才千, 等. FRP管约束混凝土的轴压应力-应变关系研究[J]. 工程力学, 2006, 23(9): 98-103.
[42] Fraldi M, Nunziante L, Carannante F. On the prediction of the collapse load of circular concrete columns confined by FRP[J]. Engineering Structures, 2008, 30(11): 3247-3264.
[43] FitzwilliamJ, BisbyLA. Effects of slenderness on circular FRP confined concrete columns[J]. Journal of Composites for Construction,2010, 14(3): 80-288.