内嵌CFRP板条加固超载损伤钢筋混凝土梁试验研究

doi:10.12068/j.issn.1005-3026.2018.06.029

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (6): 907-912.DOI: 10.12068/j.issn.1005-3026.2018.06.029

• 资源与土木工程 • 上一篇

内嵌CFRP板条加固超载损伤钢筋混凝土梁试验研究

杨佳^1,2，王连广¹

(1. 东北大学资源与土木工程学院，辽宁沈阳110819; 2. 沈阳大学建筑工程学院，辽宁沈阳110044)

收稿日期:2017-02-27 修回日期:2017-02-27 出版日期:2018-06-15 发布日期:2018-06-22
通讯作者: 杨佳
作者简介:杨佳(1981-)，女，辽宁沈阳人，东北大学博士研究生; 王连广(1964-)，男，辽宁鞍山人，东北大学教授，博士生导师.冯明杰(1971-)，男，河南禹州人，东北大学副教授; 王恩刚(1962-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51504125)；中国博士后基金资助项目(2017M611253)；辽宁省自然科学基金资助项目(20170540303) .国家自然科学基金资助项目(51171041).

Experimental Research on Overloaded Damaged Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strips

YANG Jia^1,2， WANG Lian-guang¹

1. School of Resources ＆ Civil Engineering， Northeastern University， Shenyang 110819， China; 2. College of Architectural and Civil Engineering， Shenyang University， Shenyang 110044， China.

Received:2017-02-27 Revised:2017-02-27 Online:2018-06-15 Published:2018-06-22
Contact: WANG Lian-guang
About author:-
Supported by:
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摘要/Abstract

摘要： 为研究超载情况下内嵌CFRP板条加固损伤混凝土梁的抗弯性能，进行了5根钢筋混凝土梁的抗弯试验，模拟了超载损伤状态，研究了加固梁的破坏形态、承载能力和刚度，分析了超载重复次数和超载幅值对加固梁抗弯性能的影响.试验结果表明:内嵌CFRP板条加固损伤混凝土梁可以提高梁的承载能力，提高幅度在16%~27%.超载重复次数和超载幅值影响加固梁的屈服荷载、极限荷载和刚度，屈服荷载和极限荷载随着超载重复次数和超载幅值增加而降低，刚度随超载重复次数的增加而减小.建立了承载力计算公式，理论计算结果与试验结果吻合良好.

关键词: CFRP板条, 加固, 钢筋混凝土, 超载, 承载力

Abstract: In order to investigate the performance of damaged reinforced concrete beams strengthened with near surface mounted (NSM) carbon fiber reinforced polymer (CFRP) strips under overloading， the bending test of five reinforced concrete beams was carried out. The overloading state was simulated， and the failure mode， capacity and stiffness were studied. The influences of the overload cycle number and overload amplitude on the performance of reinforced concrete beams were also evaluated. The results show that embedding CFRP strips can enhance the capacity of overloaded damaged reinforced concrete beams to about 16% to 27%. The cycle number and overload amplitude affect the yield and ultimate load and stiffness in different ways. The yield and ultimate load decrease with the increase of cycle number and overload amplitude. The stiffness decreases with the increase of cycle number. The formula of ultimate bearing capacity is established， and the calculated results agree well with the experimental results.

Key words: CFRP strips, strengthening, reinforced concrete beams, overloading, bending bearing capacity

中图分类号:

TU398

杨佳，王连广. 内嵌CFRP板条加固超载损伤钢筋混凝土梁试验研究[J]. 东北大学学报:自然科学版, 2018, 39(6): 907-912.

YANG Jia， WANG Lian-guang. Experimental Research on Overloaded Damaged Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strips[J]. Journal of Northeastern University Natural Science, 2018, 39(6): 907-912.

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内嵌CFRP板条加固超载损伤钢筋混凝土梁试验研究

Experimental Research on Overloaded Damaged Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strips

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