|本期目录/Table of Contents|

[1]邢国华,罗小宝,马 军,等.铝合金筋加固混凝土梁界面黏结性能与剥离承载力研究[J].建筑科学与工程学报,2021,38(01):41-50.[doi:10.19815/j.jace.2020.08053]
 XING Guo-hua,LUO Xiao-bao,MA Jun,et al.Study on Bonding Performance and Debonding Capacity of RC Beam Strengthened with NSM Aluminum Alloy Bars[J].Journal of Architecture and Civil Engineering,2021,38(01):41-50.[doi:10.19815/j.jace.2020.08053]
点击复制

铝合金筋加固混凝土梁界面黏结性能与剥离承载力研究(PDF)
分享到:

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
38卷
期数:
2021年01期
页码:
41-50
栏目:
出版日期:
2021-01-20

文章信息/Info

Title:
Study on Bonding Performance and Debonding Capacity of RC Beam Strengthened with NSM Aluminum Alloy Bars
文章编号:
1673-2049(2021)01-0041-10
作者:
邢国华罗小宝马 军常召群党会学
(长安大学 建筑工程学院,陕西 西安 710061)
Author(s):
XING Guo-hua LUO Xiao-bao MA Jun CHANG Zhao-qun DANG Hui-xue
(School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China)
关键词:
混凝土梁 嵌入式加固 铝合金 有限元 黏结-滑移关系 剥离承载力
Keywords:
concrete beam NSM aluminum alloy finite element bond stress-slip relationship debonding capacity
分类号:
TU377.9
DOI:
10.19815/j.jace.2020.08053
文献标志码:
A
摘要:
通过试验研究与有限元模拟计算,分析了铝合金筋嵌入式加固混凝土梁的破坏模式和承载能力,对比了不同的剥离承载力计算模型,获得了铝合金筋应力和应变以及界面黏结应力沿梁跨度方向的分布曲线,推导出界面黏结-滑移关系和剥离承载力计算公式。结果表明:铝合金筋加固混凝土梁界面剥离破坏模式分为界面剥离破坏和混凝土保护层剥离破坏,混凝土梁加固后,抗弯性能和变形性能均得到改善; 界面剥离破坏是由跨中弯曲裂缝引起的局部界面黏结失效,最终延伸至加固筋一端从而造成加固筋剥离; 混凝土保护层剥离破坏是由于加固筋端部应力集中,造成周围混凝土保护层发生剥离脱落; 沿着梁的跨中至梁端方向,铝合金筋的应力和应变逐渐降低,界面黏结应力先增大后减小且应力最大值随荷载的增加而增加; 铝合金-结构胶界面和结构胶-混凝土界面的黏结-滑移关系曲线可分为4个阶段,即弹性阶段、弹性软化阶段、弹性软化剥离阶段和软化剥离阶段; 建议的计算模型可以较准确地预测铝合金筋加固混凝土梁的剥离承载力。
Abstract:
Through experimental research and finite element analysis, the failure mode and bearing capacity of concrete beams strengthened with near surface mounted(NSM)aluminum alloy(AA)bars were analyzed, different debonding capacity calculation models were compared, the distribution curves of stress and strain of the AA bars and interface bond stress along the beam span direction were obtained, and the interface bond stress-slip relationship and the calculation formula of debonding capacity were derived. The results show that there are two modes of interface debonding failure of concrete beams strengthened with AA bars, namely, the intermediate crack debonding and concrete cover separation. The flexural performance and deformation performance of concrete beams are improved after the beams being strengthened. The intermediate crack-induced debonding between NSM bars and concrete is induced by the extension of bending cracks in the constant moment region. The concrete cover separation occurs because of the extension of several cracks induced by the stress concentration at the end of the NSM bars. Along the direction from mid-span to beam end, the stress and strain of the AA bars gradually decrease, the interface bonding stress firstly increases and then decreases, and the maximum stress increases with the increase of the load. The debonding process of RC beam strengthened with NSM AA bars can be divided into four stages, namely, elastic stage, elastic softening stage, elastic softening debonding stage and softening debonding stage. The proposed calculation model can accurately predict the debonding capacity of concrete beams strengthened with AA bars.

参考文献/References:

[1] 张 鹏,凌亚青,邓 宇,等.CFRP-PCPs复合筋嵌入加固钢筋混凝土梁裂缝试验及计算方法研究[J].复合材料学报,2013,30(5):251-257.
ZHANG Peng,LING Ya-qing,DENG Yu,et al.Experiment and Calculation on Crack of Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP-PCPs Reinforcement[J].Acta Materiae Compositae Sinica,2013,30(5):251-257.
[2]LEE H Y,JUNG W T,CHUNG W.Flexural Strengthening of Reinforced Concrete Beams with Pre-stressed Near Surface Mounted CFRP Systems[J].Composite Structures,2017,163:1-12.
[3]郑志勇,孙海平.嵌入式FRP筋加固梁抗弯承载力分析[J].建筑结构,2016,46(5):80-85.
ZHENG Zhi-yong,SUN Hai-ping.Flexural Bearing Capacity Analysis of Strengthened Beam with Near-surface Mounted FRP Bars[J].Building Structure,2016,46(5):80-85.
[4]RASHEED H A,ABDALLA J,HAWILEH R,et al.Flexural Behavior of Reinforced Concrete Beams Strengthened with Externally Bonded Aluminum Alloy Plates[J].Engineering Structures,2017,147:473-485.
[5]苟海刚,邢国华,武名阳,等.铝合金/GFRP筋近表面嵌入式增强钢筋混凝土梁抗弯性能试验[J].中国公路学报,2019,32(8):125-133,164.
GOU Hai-gang,XING Guo-hua,WU Ming-yang,et al.Experiment on the Flexural Behavior of Reinforced Concrete Beams Strengthened with NSM Aluminum Alloy/GFRP Bars[J].China Journal of Highway and Transport,2019,32(8):125-133,164.
[6]张 峰,徐向锋,李术才.HB-FRP加固混凝土结构的粘结滑移模型[J].中国公路学报,2015,28(1):38-44,53.
ZHANG Feng,XU Xiang-feng,LI Shu-cai.Bond-slip Model for HB-FRP Systems Bonded to Concrete[J].China Journal of Highway and Transport,2015,28(1):38-44,53.
[7]ZHOU Y W,WU Y F,YUN Y C.Analytical Modeling of the Bond-slip Relationship at FRP-concrete Interfaces for Adhesively-bonded Joints[J].Composites Part B:Engineering,2010,41(6):423-433.
[8]张海霞,何禄源,刘 泓.考虑粘结滑移性能的表面内嵌CFRP板混凝土梁受力性能影响因素分析[J].沈阳建筑大学学报:自然科学版,2015,31(4):603-612.
ZHANG Hai-xia,HE Lu-yuan,LIU Hong.Influence Factor Analysis on Mechanical Behavior of the Concrete Beam Strengthened with Near-surface Mounted CFRP Strips with Consideration of Bond-slip Relationship[J].Journal of Shenyang Jianzhu University:Natural Science,2015,31(4):603-612.
[9]冯 鹏,陆新征,叶列平.纤维增强复合材料建设工程应用技术——试验、理论与方法[M].北京:中国建筑工业出版社,2011.
FENG Peng,LU Xin-zheng,YE Lie-ping.Application of Fiber Reinforced Polymer in Construction:Experiment,Theory and Methodology[M].Beijing:China Architecture & Building Press,2011.
[10]GUO Y C,LI L J,CHEN G M,et al.Influence of Hollow Imperfections in Adhesive on the Interfacial Bond Behaviors of FRP-plated RC Beams[J].Construction and Building Materials,2012,30:597-606.
[11]谢建和,孙明炜,郭永昌,等.FRP加固受损RC梁受弯剥离承载力预测模型[J].中国公路学报,2014,27(12):73-79.
XIE Jian-he,SUN Ming-wei,GUO Yong-chang,et al.Prediction Model for Debonding Bearing Capacity of Damaged Reinforced Concrete Beam Flexurally Strengthened with Fiber Reinforced Polymer[J].China Journal of Highway and Transport,2014,27(12):73-79.
[12]俞裕果,黄炎生.FRP-混凝土界面粘结性能有限元方法研究[J].土木建筑工程信息技术,2013,5(2):56-61.
YU Yu-guo,HUANG Yan-sheng.FEM Research of Bonding Behavior of the Interface Between FRP and Concrete[J].Journal of Information Technology in Civil Engineering and Architecture,2013,5(2):56-61.
[13]陆新征,滕锦光,叶列平,等.FRP加固混凝土梁受弯剥离破坏的有限元分析[J].工程力学,2006,23(6):85-93.
LU Xin-zheng,TENG Jin-guang,YE Lie-ping,et al.Finite Element Analysis of Intermediate Crack-induced Debonding in FRP Strengthened RC Beams[J].Engineering Mechanics,2006,23(6):85-93.
[14]GB/T 50081—2002,普通混凝土力学性能试验方法标准[S].
GB/T 50081—2002,Standard for Test Method of Mechanical Properties on Ordinary Concrete[S].
[15]GB/T 228.1—2010,金属材料拉伸试验第1部分:室温试验方法[S].
GB/T 228.1—2010,Metallic Materials — Tensile Testing — Part 1:Method of Test at Room Temperature[S].
[16]ACI 440-08,Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures[S].
[17]李 杨,任沛琪,丁井臻,等.钢-混凝土双面组合作用梁基本力学性能试验研究与数值模拟[J].工程力学,2020,37(5):82-93.
LI Yang,REN Pei-qi,DING Jing-zhen,et al.Experimental Study and Numerical Simulation of Mechanical Properties of Double Composite Steel-concrete Beams[J].Engineering Mechanics,2020,37(5):82-93.
[18]陆新征,谭 壮,叶列平,等.FRP布-混凝土界面粘结性能的有限元分析[J].工程力学,2004,21(6):45-50.
LU Xin-zheng,TAN Zhuang,YIE Lie-ping,et al.Finite Element Analysis of Debonding at the Interface Between FRP Sheet and Concrete[J].Engineering Mechanics,2004,21(6):45-50.
[19]GB 50010—2010,混凝土结构设计规范[S].
GB 50010—2010,Code for Design of Concrete Structures[S].
[20]姜德文,黄海林,刘光伟,等.基于双剪试验的铝合金板-混凝土界面粘结滑移性能研究[J].工程力学,2020,37(增):287-295.
JIANG De-wen,HUANG Hai-lin,LIU Guang-wei,et al.Study on Bond Slip Performance of Aluminum Alloy-concrete Interface Based on Double Shear Test[J].Engineering Mechanics,2020,37(S):287-295.
[21]俞裕果.FRP-混凝土界面粘结性能理论研究[D].广州:华南理工大学,2013.
YU Yu-guo.Theoretical Study on Bond Behavior of FRP-to-concrete Interface[D].Guangzhou:South China University of Technology,2013.
[22]WOO S K,LEE Y.Experimental Study on Interfacial Behavior of CFRP-bonded Concrete[J].KSCE Journal of Civil Engineering,2010,14(3):385-393.
[23]俞裕果,李 静,袁 兵,等.FRP-混凝土界面剥离承载力[J].中南大学学报:自然科学版,2014,45(11):3986-3992.
YU Yu-guo,LI Jing,YUAN Bing,et al.Bonding Strength of FRP-to-concrete Interface[J].Journal of Central South University:Science and Technology,2014,45(11):3986-3992.
[24]童谷生,艾博雯.FRP-混凝土界面黏结滑移关系研究进展[J].混凝土,2016(8):1-7.
TONG Gu-sheng,AI Bo-wen.Research Advance of FRP-concrete Interface Bond-slip Relationship[J].Concrete,2016(8):1-7.
[25]SERACINO R,JONES N M,ALI M S M,et al.Bond Strength of Near-surface Mounted FRP Strip-to-concrete Joints[J].Journal of Composites for Construction,2007,11(4):401-409.
[26]ZHANG L,TENG J G.Finite Element Prediction of Interfacial Stresses in Structural Members Bonded with a Thin Plate[J].Engineering Structures,2010,32(2):459-471.
[27]高 振.嵌入式FRP加固钢筋混凝土梁抗弯性能研究[D].沈阳:东北大学,2014.
GAO Zhen.Flexural Performance of RC Beams Strengthened with Near-surface Mounted FRP[D].Shenyang:Northeastern University,2014.
[28]李 可,李思远,王新玲.基于梁式试验的CFRP布-混凝土界面剥离承载力计算模型研究[J].结构工程师,2017,33(4):40-46.
LI Ke,LI Si-yuan,WANG Xin-ling.Study on Calculation Model of Interfacial Debonding Bearing Capacity of the CFRP-concrete Interface Based on Beam Tests[J].Structural Engineers,2017,33(4):40-46.
[29]贺学军.FRP加固负载混凝土梁的抗弯性能及剥离行为研究[D].长沙:中南大学,2007.
HE Xue-jun.Studies on Flexural Behavior and Debonding Mechanism of RC Beams FRP-strengthened at Different Preloaded States[D].Changsha:Central South University,2007.

相似文献/References:

[1]邢国华,牛荻涛,何志兵,等.铝合金配筋新型混凝土梁试验研究[J].建筑科学与工程学报,2015,32(01):35.
 XING Guo-hua,NIU Di-tao,HE Zhi-bing,et al.Experiment Study on New Type Concrete Beams Reinforced with Aluminum Alloy Bars[J].Journal of Architecture and Civil Engineering,2015,32(01):35.
[2]王 钧,栾 奕,叶焕军.玄武岩纤维混凝土梁裂缝和变形试验研究[J].建筑科学与工程学报,2016,33(04):76.
 WANG Jun,LUAN Yi,YE Huan-jun.Experimental Research on Crack and Deformation of Basalt Fiber Reinforced Concrete Beams[J].Journal of Architecture and Civil Engineering,2016,33(01):76.

备注/Memo

备注/Memo:
收稿日期:2020-08-22
基金项目:国家自然科学基金项目(51868073); 陕西省技术创新引导专项(基金)项目(2019CGHJ-06);
中央高校基本科研业务费专项资金项目(300102288302)
作者简介:邢国华(1983-),男,内蒙古呼和浩特人,教授,博士研究生导师,工学博士,E-mail:ghxing@chd.edu.cn。
更新日期/Last Update: 2021-01-20