内嵌CFRP筋加固混凝土试件的粘结性能试验研究

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (8): 16-21.

内嵌CFRP筋加固混凝土试件的粘结性能试验研究

丁亚红^*, 申崔红, 徐平

河南理工大学土木工程学院,焦作 454003

收稿日期:2013-09-02 出版日期:2014-08-28 发布日期:2021-09-13
作者简介:丁亚红(1973-),女,博士,教授,主要从事结构工程研究,dingyahong@hpu.edu.cn。
基金资助:
国家自然科学基金(51108161);河南省重点科技攻关项目(092102240009);河南省重点学科项目(509919);河南理工大学博士基金(B2010-10);河南理工大学青年基金(Q2013-09A)

EXPERIMENTAL STUDY ON THE BOND BEHAVIOR OF THE REINFORCEMENT CONCRETE SPECIMENS WITH NEAR-SURFACE MOUNTED CFRP RODS

DING Ya-hong^*, SHEN Cui-hong, XU Ping

Department of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China

Received:2013-09-02 Online:2014-08-28 Published:2021-09-13

摘要/Abstract

摘要： 在内嵌筋材加固混凝土试件中,良好的粘结质量是保证加固效果的关键。通过对13根内嵌碳纤维复合材料(CFRP)筋的拔出试验,研究了内嵌加固的粘结剪应力、破坏模式、试验现象,分析了混凝土强度、开槽尺寸对粘结性能的影响。结果表明,粘结试件达到破坏荷载时,剪应力的最大值出现在距加载端100~200mm的范围内;当发生结构胶与混凝土界面破坏时,随着混凝土强度的增加,粘结强度增大;开槽尺寸对破坏模式的影响较大。研究结果为实际工程应用提供依据,具有一定的参考价值。

关键词: 内嵌加固, 混凝土, CFRP, 粘结性能, 剪应力

Abstract: Perfect bonding is the key to guarantee the strengthening effect for the method of Near-surface mounted (NSM). The pull-out-test of the 13 concrete specimens reinforced by CFRP rods with NSM method was studied to test the bonding shear stress, failure modes and experiment phenomena. The effect of concrete strength and notch-groove size were analyzed. The results showed that the maximum shear stress appeared at the loading end under low loading. And the maximum shear stress would appear at the loading end of 100~200mm when the load reached the failure load. The bond strength increased with concrete strength if the failure occurred at the interface of the glue and the concrete. The slotting sizes had an important influence on the failure modes. The research provides the basis for the practical engineering.

Key words: near-surface mounted, concrete, CFRP, adhesive behavior, shear stress

中图分类号:

TB332
TU317

丁亚红, 申崔红, 徐平. 内嵌CFRP筋加固混凝土试件的粘结性能试验研究[J]. 复合材料科学与工程, 2014, 0(8): 16-21.

DING Ya-hong, SHEN Cui-hong, XU Ping. EXPERIMENTAL STUDY ON THE BOND BEHAVIOR OF THE REINFORCEMENT CONCRETE SPECIMENS WITH NEAR-SURFACE MOUNTED CFRP RODS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(8): 16-21.

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