内嵌CFRP板条加固损伤预应力混凝土梁抗弯性能

doi:10.12068/j.issn.1005-3026.2019.04.026

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (4): 590-595.DOI: 10.12068/j.issn.1005-3026.2019.04.026

内嵌CFRP板条加固损伤预应力混凝土梁抗弯性能

杨佳^1,2，王连广¹，侯雯峪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:2018-02-27 修回日期:2018-02-27 出版日期:2019-04-15 发布日期:2019-04-26
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.
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).

Flexural Performance of Damaged Prestressed Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strips

YANG Jia^1,2， WANG Lian-guang¹， HOU Wen-yu¹

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

Received:2018-02-27 Revised:2018-02-27 Online:2019-04-15 Published:2019-04-26
Contact: WANG Lian-guang
About author:-
Supported by:
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摘要/Abstract

摘要： 为研究超载状态下内嵌CFRP板条加固损伤预应力钢筋混凝土梁的抗弯性能，对6根预应力钢筋混凝土梁进行了抗弯试验.研究了损伤加固梁的破坏形态、加固梁的承载能力和刚度，探讨了超载重复次数、超载幅值和负载加固对梁抗弯性能的影响.试验结果表明:与未加固梁相比，加固后梁的承载能力和抗弯刚度显著提高，极限承载力提高幅度在7%~15%之间;超载重复次数、超载幅值和负载加固对加固梁的极限承载力影响较小;超载幅值和负载加固影响加固梁的刚度;建立的承载力计算公式合理，与试验结果相符.

关键词: 预应力钢筋混凝土梁, 抗弯性能, 试验研究, 碳纤维增强复合材料, 损伤, 负载

Abstract: In order to investigate the flexural performance of damaged prestressed reinforced concrete(PRC) beams strengthened with near surface mounted(NSM) carbon fiber reinforced polymer(CFRP) strips under overloading， bending tests of six PRC beams were carried out. The failure mode， bearing capacity and stiffness of PRC beams strengthened with NSM CFRP strips were studied. The influences of the number of overloading cycles， overloading amplitude and sustaining load on the performance of strengthened beams were also evaluated. The experimental results indicated that compared with un-strengthened beam， the flexural capacity and stiffness of the strengthened beams can be enhanced obviously. The ultimate loads are increased by 7% to 15%. There are little influences on ultimate bearing capacity of the strengthened beams caused by the cycle number， the overload amplitude and the sustaining load， while the overload amplitude and the sustaining load affect the stiffness of the strengthened beams. A calculation formula of bearing capacity is established， and the theoretical values agree well with the experimental values.

Key words: prestressed reinforced concrete beams, flexural performance, experimental research, carbon fiber reinforced polymer, damage, sustaining load

中图分类号:

TU378.2

杨佳，王连广，侯雯峪. 内嵌CFRP板条加固损伤预应力混凝土梁抗弯性能[J]. 东北大学学报:自然科学版, 2019, 40(4): 590-595.

YANG Jia， WANG Lian-guang， HOU Wen-yu. Flexural Performance of Damaged Prestressed Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strips[J]. Journal of Northeastern University Natural Science, 2019, 40(4): 590-595.

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内嵌CFRP板条加固损伤预应力混凝土梁抗弯性能

Flexural Performance of Damaged Prestressed Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strips

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