界面粘结特性对表层嵌贴FRP板条加固RC梁抗弯性能的影响分析

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (10): 40-45.

界面粘结特性对表层嵌贴FRP板条加固RC梁抗弯性能的影响分析

张智梅, 黄庆彬^*, 赵雷

上海大学土木工程系,上海200444

收稿日期:2019-01-10 出版日期:2019-10-28 发布日期:2019-10-28
通讯作者: 黄庆彬(1994-),男,硕士研究生,研究方向为FRP加固工程结构,qingbin1994@qq.com。
作者简介:张智梅(1972-),女,副教授,博士,研究方向为工程结构的抗火和加固。

RESEARCH ON THE EFFECT OF INTERFACIAL BOND-SLIP PROPERTY ON FLEXURALPERFORMANCE OF CONCRETE BEAMS STRENGTHENED WITH NSM-FRP STRIPS

ZHANG Zhi-mei, HUANG Qing-bin^*, ZHAO Lei

Department of Civil Engineering, Shanghai University, Shanghai 200444, China

Received:2019-01-10 Online:2019-10-28 Published:2019-10-28

摘要/Abstract

摘要： 利用ABAQUS对表层嵌贴(NSM)FRP板条加固的钢筋混凝土梁进行有限元模拟,提出考虑FRP-混凝土界面破坏的加固梁的模拟方法,即在界面上运用弹簧单元模拟FRP-混凝土的粘结-滑移关系,研究界面粘结-滑移性能对表层嵌贴FRP加固混凝土梁抗弯性能的影响。结果表明:FRP-混凝土界面的粘结滑移对NSM FRP加固梁的抗弯性能有较大影响,必须加以考虑。模拟时,在FRP-混凝土界面间用非线性弹簧连接可以较好地模拟出界面破坏,在研究加固梁在正常使用极限状态下的各项性能时,使用线性弹簧连接进行表层嵌贴FRP加固梁的模拟更加便捷且不失精度。

关键词: 表层嵌贴FRP加固, 混凝土梁的抗弯性能, 弹簧单元, 界面粘结-滑移

Abstract: The concrete beam strengthened with near-surface mounted FRP strips(NSM-FRP strips) is simulated by finite element method using ABAQUS software, and the simulation method of reinforced beam considering the interface failure of FRP-concrete is proposed. In order to study the effect of interface bonding-slip performance on the bending behavior of the concrete beam strengthened with NSM-FRP strips, the spring2 nonlinear elements is used to simulate the bond-slip relationship of FRP-concrete interface. The flexural behavior of RC beams under different interface bonding relationships was recorded and compared. The results show that the bond slip of the FRP-concrete interface has a great influence on the bending resistance of the beam strengthened with NSM FRP and must be considered. The nonlinear spring connection between the interfaces can do a better job in simulating the bond-slip failure of the interface. When studying the performance of the reinforced beam under serviceability limit state, it is more convenient and accurate to use the linear spring connection to simulate the NSM FRP strengthened beam.

Key words: strengthened with NSM-FRP strips, flexural behavior of RC beams, spring element, interfacialbond-slip

中图分类号:

TB332

张智梅, 黄庆彬, 赵雷. 界面粘结特性对表层嵌贴FRP板条加固RC梁抗弯性能的影响分析[J]. 玻璃钢/复合材料, 2019, 0(10): 40-45.

ZHANG Zhi-mei, HUANG Qing-bin, ZHAO Lei. RESEARCH ON THE EFFECT OF INTERFACIAL BOND-SLIP PROPERTY ON FLEXURALPERFORMANCE OF CONCRETE BEAMS STRENGTHENED WITH NSM-FRP STRIPS[J]. Fiber Reinforced Plastics/Composites, 2019, 0(10): 40-45.

参考文献

[1]丁亚红, 郝敏慧. FRP加固技术研究概述. 工程抗震与加固改造, 2012, 34(2): 69-74.
[2] 岳清瑞, 李庆伟, 杨勇新.纤维增强复合材料嵌入式加固技术. 工业建筑, 2004, 34(4): 1-4.
[3] 王兴国, 岳军辉. RC结构表层嵌入FRP加固技术研究概述. 玻璃钢/复合材料, 2012(4): 124-128.
[4] 付利兵, 牛荻涛. 外贴FRP加固复合梁粘结破坏的承载力分析. 玻璃钢/复合材料, 2005(5): 3-5.
[5] 王勃, 李剑, 张骥. FRP-混凝土界面粘结滑移关系研究. 低温建筑技术, 2015, 205(7): 9-11.
[6] Ahmed M K. Flexural performance of RC beams strengthened with near surface mounted CFRP strips. Alexandria Engineering Journal, 2016, 55: 1497-1505.
[7] Chen J F, Teng J G. Anchorage strength models for FRP andsteel plates bonded to concrete. Journal of Structural Engineering, 2001, 127(7): 784-791.
[8] 张智梅, 张振凯, 熊浩. 建立表层嵌贴FRP 板条-混凝土界面黏结-滑移. 上海大学学报(自然科学版), 2018, 24(2): 304-313.
[9] Cosenza E, Manfredi G, Realfonzo R. Bond characteristics and anchorage length of FRP rebars//In: Porc. 2nd Int. Conf. on Advanced Compos. Mat. In Bridge Street, M. EI-Badry, 1996.
[10] 周延阳. 混凝土表层嵌贴CFRP板粘结机理研究. 杭州: 浙江大学, 2005.
[11] 陆新征, 叶列平, 滕锦光. FRP-混凝土界面粘结滑移本构模型. 建筑结构学报, 2005, 26(4): 10-18.
[12] 姚谏, 朱晓旭, 周延阳. 混凝土表层嵌贴CFRP板条的黏结承载力. 浙江大学学报(工学版), 2008, 42(1): 34-38.
[13] 王韬. 钢筋混凝土梁表层嵌贴CFRP的抗弯加固性能研究. 杭州: 浙江大学, 2005.
[14] 中华人民共和国住房和城乡建设部. 混凝土结构设计规范: GB 50010—2010. 北京: 中国建筑工业出版社, 2010.
[15] 余江滔, 刘媛, 陆洲导. 表层嵌贴碳纤维板条加固混凝土梁的抗弯试验研究. 结构工程师, 2011, 27(2): 138-144.