BFRP条带-PVC管材复合加固纤维再生混凝土短柱轴压性能

doi:10.19936/j.cnki.2096-8000.20240628.012

摘要/Abstract

摘要： 为了研究BFRP条带-PVC管材复合加固纤维再生混凝土短柱的轴心抗压性能,对13组再生混凝土短柱进行了轴压试验和理论分析。主要研究变量为BFRP条带层数(0层、1层、3层)、BFRP间距(25 mm、37.5 mm和50 mm)和加固方式(无侧向约束、BFRP条带加固和BFRP条带-PVC管材复合加固)。研究结果表明:BFRP条带-PVC管复合加固不仅可以提高试件的极限承载力,还可以改善纤维再生混凝土短柱的破坏形态。在应力-应变曲线的非线性强化阶段,加固方式对试件刚度的影响更为显著。随着BFRP包裹量的增加,试件的峰值应力和极限应变均明显增加。依据试验数据建立的软化段的应力-应变计算模型具有较好的适用性。

关键词: 纤维再生混凝土, BFRP条带-PVC管, 轴压性能, 应力-应变模型, 复合材料

Abstract: To investigate the axial compressive performance of short columns of BFRP strip-PVC tube composite reinforced fiber recycled concrete. Axial compression tests and theoretical analysis were conducted on 13 groups of short columns of recycled concrete. The main variables studied were the number of BFRP strip layers (0, 1 and 3 layers), BFRP spacing (25 mm, 37.5 mm and 50 mm), and reinforcement methods (no lateral restraint, BFRP strip reinforcement, and BFRP strip-PVC tube composite reinforcement). The results show that the BFRP strip-PVC tube composite reinforcement can not only improve the ultimate bearing capacity of the specimens, but also improve the damage morphology of the short columns of fiber-reinforced concrete. In the nonlinear strengthening phase of the stress-strain curve, the influence of the reinforcement method on the stiffness of the specimen is more significant. With the increase of BFRP wrapping, the peak stress and ultimate strain of the specimens were significantly increased. The stress-strain calculation model of the softened section established based on the test data has better applicability.

Key words: fiber recycled concrete, BFRP strip-PVC tube, axial compression performance, stress-strain model, composite material

中图分类号:

TB332

徐冬梅, 刘华新, 李艳. BFRP条带-PVC管材复合加固纤维再生混凝土短柱轴压性能[J]. 复合材料科学与工程, 2024, 0(6): 95-105.

XU Dongmei, LIU Huaxin, LI Yan. Axial compression performance of BFRP strip-PVC tube composite reinforced fiber recycled concrete short columns[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(6): 95-105.

参考文献

[1] 杨震, 李奕方, 周汝光. 再生混凝土配合比设计方法现状分析[J]. 河南科技, 2021, 40(3): 72-75.
[2] SAGOE-CRENTSIL K K, BROWN T, TAYLOR A H. Performance of concrete made with commercially produced coarse recycled concrete aggregate[J]. Cement and Concrete Research, 2001, 31(5): 707-712.
[3] ETXEBERRIA M, VÁZQUEZ E, MARí A, et al. Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete[J]. Cement and Concrete Research, 2007, 37(5): 735-742.
[4] XIAO J, LI J, ZHANG C. Mechanical properties of recycled aggregate concrete under uniaxial loading[J]. Cement and Concrete Research, 2005, 35(6): 1187-1194.
[5] MOHAMMED T U, HASNAT A, AWAL M A, et al. Recycling of brick aggregate concrete as coarse aggregate[J]. Journal of Materials in Civil Engineering, 2015, 27(7): B4014005.
[6] ZHANG C, WANG Y, ZHANG X, et al. Mechanical properties and microstructure of basalt fiber-reinforced recycled concrete[J]. Journal of Cleaner Production, 2021, 278: 123252.
[7] 万梓豪. PFRP-PVC复合约束含砖骨料再生混凝土受压性能研究[D]. 长沙: 湖南大学, 2018.
[8] GAO C, HUANG L, YAN L B, et al. Behavior of glass and carbon FRP tube encased recycled aggregate concrete with recycled clay brick aggregate[J]. Composite Structures, 2016, 155: 245-254.
[9] TOUTANJI H, SAAFI M. Stress-strain behavior of concrete columns confined with hybrid composite materials[J]. Materials and Structures, 2002, 35(6): 338-347.
[10] TOUTANJI H, SAAFI M. Durability studies on concrete columns encased in PVC-FRP composite tubes[J]. Composite Structures, 2001, 54(1): 27-35.
[11] TOUTANJI H, SAAFI M. Stress-strain behavior of concrete columns confined with hybrid composite materials[J]. Materials and Structures, 2002, 35(6): 338-347.
[12] ZHOU X, LI B, GAN D, et al. Connections between RC beam and square tubed-RC column under axial compression: Experiments[J]. Steel and Composite Structures, 2017, 23: 453-464.
[13] NEMATZADEH M, FAZLI S, NAGHIPOUR M, et al. Experimental study on modulus of elasticity of steel tube-confined concrete stub columns with active and passive confinement[J]. Engineering Structures, 2017, 130: 142-153.
[14] LAI M, LIANG Y, WANG Q, et al. A stress-path dependent stress-strain model for FRP-confined concrete[J]. Engineering Structures, 2020, 203: 109824.
[15] 焦楚杰, 李松, 崔力仕, 等. CFRP约束钢管-活性粉末混凝土短柱轴压性能[J]. 复合材料学报, 2021, 38(2): 439-448.
[16] GUO L, LIU Y, FU F, et al. Behavior of axially loaded circular stainless steel tube confined concrete stub columns[J]. Thin-Walled Structures, 2019, 139: 66-76.
[17] WU P, LIU J, YU F, et al. Flexural stiffness analysis of the PVC-CFRP-confined concrete columns with RC ring beam joint under eccentric load[J]. Iranian Journal of Science and Technology, Transactions of Civil Engineering, 2022, 46(3): 1825-1840.
[18] AN LE H, EKKEHARD F. Analysis of circular steel tube confined UHPC stub columns[J]. Steel and Composite Structures, An International Journal, 2017, 23(6): 669-682.
[19] KURT C E. Closure to “concrete filled structural plastic columns”[J]. Journal of the Structural Division, 1979, 105(11): 2469.
[20] GUO Y, HUANG P, YANG Y, et al. Experimental studies on axially loaded concrete columns confined by different materials[J]. Key Engineering Materials, 2009, 400-402: 513-518.
[21] PHAM T M, HADI M N S, YOUSSEF J. Optimized FRP wrapping schemes for circular concrete columns under axial compression[J]. Journal of Composites for Construction, 2015, 19(6): 04015015.
[22] ZENG J, GUO Y, LI L, et al. Behavior and three-dimensional finite element modeling of circular concrete columns partially wrapped with FRP strips[J]. Polymers, 2018, 10(3): 253.
[23] ZENG J, GUO Y, GAO W, et al. Behavior of partially and fully FRP-confined circularized square columns under axial compression[J]. Construction and Building Materials, 2017, 152: 319-332.
[24] CAMPIONE G, LA MENDOLA L, MONACO A, et al. Behavior in compression of concrete cylinders externally wrapped with basalt fibers[J]. Composites Part B: Engineering, 2015, 69: 576-586.
[25] SALJOUGHIAN A, MOSTOFINEJAD D. Axial-flexural interaction in square RC columns confined by intermittent CFRP wraps[J]. Composites Part B: Engineering, 2016, 89: 85-95.
[26] PARK T W, NA U J, CHUNG L, et al. Compressive behavior of concrete cylinders confined by narrow strips of CFRP with spacing[J]. Composites Part B: Engineering, 2008, 39(7): 1093-1103.
[27] 定向纤维增强聚合物基复合材料拉伸性能试验方法: GB/T 3354—2014[S]. 北京: 中国标准出版社, 2014: 1.
[28] 热塑性塑料管材拉伸性能测定第1部分: 试验方法总则: GB/T 8804.1—2003[S]. 北京: 中国标准出版社, 2003: 1.
[29] 普通混凝土配合比设计规程: JGJ 55—2011[S]. 北京: 中国建筑工业出版社, 2011.
[30] 纤维混凝土应用技术规程: JGJ/T 221—2010[S]. 北京: 中国建筑工业出版社, 2010.
[31] 再生混凝土结构技术标准: JGJ/T 443—2018[S]. 北京: 中国建筑工业出版社, 2018.
[32] FAN Z, LIU H, LIU G, et al. Compressive performance of fiber reinforced recycled aggregate concrete by basalt fiber reinforced polymer-polyvinyl chloride composite jackets[J]. Journal of Renewable Materials, 2023, 11(4): 1763-1791.
[33] FRHAAN W K M, ABU BAKAR B H, HILAL N, et al. CFRP for strengthening and repairing reinforced concrete: A review[J]. Innovative Infrastructure Solutions, 2021, 6(2): 49.
[34] 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.
[35] HAN T, JI J, DONG Z, et al. Compression behavior of concrete columns strengthened by a hybrid BFRP/HDPE tube coupled with a crumb rubber concrete cladding layer[J]. Construction and Building Materials, 2023, 364: 129969.
[36] LAM L, TENG J G. Design-oriented stress-strain model for FRP-confined concrete in rectangular columns[J]. Journal of Reinforced Plastics and Composites, 2003, 22(13): 1149-1186.
[37] 李培培. BFPR-PVC管自密实再生混凝土短柱轴心受压力学性能研究[D]. 锦州: 辽宁工业大学, 2015.
[38] 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(11): 7-14, 76.
[39] YOUSSEF M N, FENG M Q, MOSALLAM A S. Stress-strain model for concrete confined by FRP composites[J]. Composites Part B: Engineering, 2007, 38(5): 614-628.
[40] OZBAKKALOGLU T, LIM J C, VINCENT T. FRP-confined concrete in circular sections: Review and assessment of stress-strain models[J]. Engineering Structures, 2013, 49: 1068-1088.
[41] RICHART F E, BRANDTZÆG A, BROWN R L. A study of the failure of concrete under combined compressive stresses[J]. University of Illinois, Engineering Experiment Station, 1928, 26(12): 1-92.
[42] NEWMAN K, NEWMAN J B. Failure theories and design criteria for plain concrete[J]. Structure, Solid Mechanics and Engineering Design, 1971, 963-995.
[43] SAADATMANESH H, EHSANI M R, LI M W. Strength and ductility of concrete columns externally reinforced with fiber composite straps[J]. Structural Journal, 1994, 91(4): 434-447.
[44] VINTZILEOU E, PANAGIOTIDOU E. An empirical model for predicting the mechanical properties of FRP-confined concrete[J]. Construction and Building Materials, 2008, 22(5): 841-54.