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- 2018
盐溶液干湿循环对CFRP-混凝土界面粘结性能的影响
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Abstract:
为了考察盐溶液干湿循环条件对碳纤维增强复合材料（Carbon fiber reinforced polymer，CFRP）-混凝土界面粘结性能的影响，本文采用5%的NaCl溶液来模拟海水环境，经过不同次数的干湿循环后，利用单面剪切试验对48个试件界面性能的变化情况进行了研究，分析了上述环境对界面破坏形式、界面承载力及界面剪应力等参数的影响。结果表明：在盐溶液干湿循环作用下，界面粘结性能发生显著地退化，具体表现为，随着干湿循环次数的增加，界面承载力会不断降低，且下降程度与混凝土强度和CFRP的粘贴尺寸有关，界面剪应力在不同环境下的分布具有相似性，即荷载的不断增加会使剪应力逐渐由加载端向自由端传递，但在传递过程中，有效传递区域的长度不会发生改变。 In order to investigate the effects of wet dry cycles in salt solution conditions on the interfacial bonding property of carbon fiber reinforced polymer(CFRP)-concrete, this paper adopted 5% NaCl solution to simulate seawater environment.After different times of wetting drying cycle, the single shear test was used to study the changes of 48 specimens' interfacial properties.The effects of the above mentioned environment condition on the types of interfacial bonding failure, interfacial capacity and interfacial shear stress were analyzed. The test results show that after wet dry cycles in salt solution, the interface bonding property will be significantly degraded.With the increase of cycle times, the interfacial capacity that is related to the strength of concrete and the CFRP size continues to decrease. Although the interfacial shear stress distribution under different environmental conditions all expresses as the transmission from the loading end to the free endas the load increasing, the effective bonding length does not change during the whole transfer process. 国家自然科学基金（51378089）
| [1] | SILVA M A G, FONSECA B S D, BISCAIA H. On estimates of durability of FRP based on accelerated tests[J]. Composite Structures, 2014, 116(9):377-387. |
| [2] | MEYER M R, FRIEDMAN R J, JR D S H, et al. Long-term durability of the interface in FRP composites after exposure to simulated physiologic saline environments[J]. Journal of Biomedical Materials Research, 1994, 28(10):1221. |
| [3] | LI S, REN H, HUANG C K, et al. Durability of concrete beams reinforced with CFRP sheet under wet-dry cycles and loading[J]. Journal of Southeast University, 2009, 25(3):376-380. |
| [4] | XU T, HE Z J, TANG C A, et al. Finite element analysis of width effect in interface debonding of FRP plate bonded to concrete[J]. Finite Elements in Analysis & Design, 2015, 93:30-41. |
| [5] | ZHENG X H, HUANG P Y, GUO X Y, et al. Experimental study on bond-slip constitutive relation between CFL and concrete[J]. Applied Mechanics & Materials, 2013, 302:359-364. |
| [6] | 廖志刚, 姚谏, 汪光满. 表面粘贴FRP加固混凝土单剪粘结试件的拉剪破坏[J]. 科技通报, 2010, 26(6):919-925. LIAO Z G, YAO J, WANG G M. Analysis of tension-shear failure on externally bonded FRP single shear test[J]. Bulletin of Science and Technology, 2010, 26(6):919-925(in Chinese). |
| [7] | DAI J G, UEDA T. Local bond stress slip relations for FRP sheets-concrete interfaces[C]//Proceedings of 6th International Symposium on FRP Reinforcement for Concrete Structures. Singapore:World Scientific Publishing Co. Pte. Ltd., 2003:143-152. |
| [8] | SAVIOA M, FARRACUTI B, MAZZOTTIC. Non-linear bond-slip law for FRP-concrete zones[C]//Proceedings of 6th International Symposium on FRP Reinforcement for Concrete Structures (Volume 1). Singapore:World Scientific Publishing Co. Pte. Ltd., 2003:163-172. |
| [9] | SATO Y, KIMURA K, KOBATAKE Y. Bond behavior between CFRP sheet and concrete (Part 1)[J]. Journal of Structural and Construction Engineering, 1997, 500:75-82. |
| [10] | NAKABA K, KANAKUBO T, FURUTA T, et al. Bond behavior between fiber-reinforced polymer laminates and concrete[J]. ACI Structural Journal, 2001, 98(3):359-367. |
| [11] | AL-SAIDY A H, SAADATMANESH H, EL-GAMAL S, et al. Structural behavior of corroded RC beams with/without stirrups repaired with CFRP sheets[J]. Materials and Structures, 2015:1-15. |
| [12] | HADI M N S, KHAN Q S, SHEIKH M N. Axial and flexural behavior of unreinforced and FRP bar reinforced circular concrete filled FRP tube columns[J]. Construction and Building Materials, 2016, 122:43-53. |
| [13] | 诸葛萍, 章子华, 丁勇, 等. 土木工程用CFRP筋弯折抗拉性能[J]. 复合材料学报, 2014, 31(5):1300-1305. ZHUGE P, ZHANG Z H, DING Y, et al. Tensile performance with bending of CFRP tendons used in civil engineering[J]. Acta Materiae Compositae Sinica, 2014, 31(5):1300-1305(in Chinese). |
| [14] | CHENJ F, TENGJ G. Anchorage strength models for FRP and steel plates bonded to concrete[J]. Journal of Structural Engineering, 2001, 127(7):784-791. |
| [15] | 王苏岩, 张所东, 李璐希, 等. 海水干湿循环作用下CFRP-高强混凝土黏结性能研究[J]. 大连理工大学学报, 2015(2):165-170. WANG S Y, ZHANG S D, LI L X, et al. Research on bond behavior of high-strength concretewith CFRP under seawater wet-dry cycles[J]. Journal of Dalian University of Technology, 2015(2):165-170(in Chinese). |
| [16] | 国家工业建筑诊断与改造工程技术研究中心. 碳纤维片材加固混凝土结构技术规程:CECS 146-2003(2007)[S]. 北京:中国计划出版社, 2008. National Technical Research Center for Diagnosis and Reconstruction of Industrial Building. Technical specification for strengthening concrete structures with carbon fiber reinforced polymer laminate:CECS 146-2003(2007)[S]. Beijing:China Planning Press, 2008(in Chinese). |
| [17] | 岳清瑞, 彭福明, 杨勇新, 等. 碳纤维片材耐久性初步研究[J]. 工业建筑, 2004, 34(s1):8-11. YUE Q R, PENG F M, YANG Y X, et al. Primary research on durability of carbon fiber sheets[J]. Industrial Construction, 2004, 34(s1):8-11(in Chinese). |
| [18] | 周英武. FRP-高强混凝土梁强度与延性的理论与试验研究[D]. 大连:大连理工大学, 2009. ZHOU Y W. Analytical and experimental study on the strength and ductility of FRP-reinforced high strength concrete beam[D]. Dalian:Dalian University of Technology, 2009(in Chinese). |
| [19] | YUN Y, WU Y F. Durability of CFRP-concrete joints under freeze-thaw cycling[J]. Cold Regions Science and Technology, 2011, 65(3):401-412. |
| [20] | NEUBAUER U, ROSTASY F S. Bond failure of concrete fiber reinforced polymer plates at inclined cracks-experiments and fracture mechanics model[C]//Proc. of 4th International Symposium on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, SP-188. Farmington Hills:ACI, 1999:369-382. |
| [21] | MONTI G, RENZELLI M, LUCIANI P. FRP adhesion in uncracked and cracked concrete zones[C]//Proceedings of 6th International Symposium on FRP Reinforcement for Concrete Structures. Singapore:World Scientific Publishing Co. Pte. Ltd., 2003, 1:183-192. |
| [22] | 陆新征, 叶列平, 滕锦光, 等. FRP-混凝土界面粘结滑移本构模型[J]. 建筑结构学报, 2005, 26(4):10-18. LU X Z, YE L P, TENG J G, et al. Bond-slip model for FRP-to-concrete interface[J]. JournaI of Building Structures, 2005, 26(4):10-18(in Chinese). |
