|本期目录/Table of Contents|

[1]王苏岩,张红涛,朱方芳,等.复杂环境及荷载共同作用下CFRP加固高强钢筋-混凝土梁受力性能试验[J].建筑科学与工程学报,2018,35(04):54-62.
 WANG Su-yan,ZHANG Hong-tao,ZHU Fang-fang,et al.Mechanical Performance Test of High-strength Reinforced Concrete Beam Strengthened by CFRP Under Combined Action of Complex Environment and Loading[J].Journal of Architecture and Civil Engineering,2018,35(04):54-62.
点击复制

复杂环境及荷载共同作用下CFRP加固高强钢筋-混凝土梁受力性能试验(PDF)
分享到:

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

卷:
35卷
期数:
2018年04期
页码:
54-62
栏目:
出版日期:
2018-07-30

文章信息/Info

Title:
Mechanical Performance Test of High-strength Reinforced Concrete Beam Strengthened by CFRP Under Combined Action of Complex Environment and Loading
作者:
王苏岩张红涛朱方芳刘振杰
大连理工大学海岸和近海工程国家重点实验室
Author(s):
WANG Su-yan ZHANG Hong-tao ZHU Fang-fang LIU Zhen-jie
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology
关键词:
CFRP冻融循环湿热环境持续荷载钢筋混凝土梁耐久性
Keywords:
CFRP freeze-thaw cycle hot and humid environment sustained load reinforced concrete beam durability
分类号:
-
DOI:
-
文献标志码:
A
摘要:
为研究冻融循环、湿热环境、持续荷载等因素共同作用对碳纤维增强复合材料(CFRP)加固高强钢筋混凝土梁耐久性的影响,制作了15根CFRP加固钢筋混凝土梁。对荷载和环境因素耦合作用下CFRP加固钢筋混凝土梁的结构性能进行了试验研究和理论分析。结果表明:湿热环境和冻融循环都会对CFRP加固钢筋混凝土试件产生不同程度的影响;采用CFRP加固钢筋混凝土梁将增加试件刚度,但环境作用使得黏结界面劣化,从而使加固试件刚度降低,变形增大;持续荷载会加速环境对CFRP加固钢筋混凝土试件的劣化速度,并且随着荷载等级的增大,影响越来越明显;相同环境作用下,持续荷载使得试件极限承载力降低,并且随着持续荷载的增加,试件承载力降低加快;经受150次冻融循环、湿热1 000 h作用时,持续荷载等级为30%,60%试件的承载能力分别下降2.5%,10.2%,持续荷载会加速劣化加固混凝土试件的抗弯性能;温度40°、湿度98%的湿热环境下500 h比冻融循环150次对试件劣化程度产生的影响更为显著。
Abstract:
In order to study the effects of freeze-thaw cycles, hot and humid environment and sustained loads on the durability of high-strength reinforced concrete beams strengthened with carbon fiber reinforced polymer (CFRP), a total of 15 reinforced concrete beams strengthened by CFRP were fabricated. The structural performances of reinforced concrete beams strengthened with CFRP under the interaction of load and environment were studied and theoretically analyzed. The results show that both hot and humid environment and freeze-thaw cycles have certain degrees of influences on reinforced concrete beams strengthened by CFRP. The effect of environment on the bonding interface deteriorates, and the stiffness of strengthened specimen decreases and the deformation increases. Sustained load will speed up the degradation of reinforced concrete beams strengthened by CFRP in coupled external environment, and the higher the sustained load increases, the more obvious the degradation effect is. Under the same environment, the ultimate bearing capacity of specimen is reduced, and the bearing capacity of specimen decreases as the continuous load increases. Under the action of 150 freeze-thaw cycles and 1 000 h continuously in hot and humid environment, the bearing capacities of specimens under 30% and 60% load grades decrease by 2.5% and 10.2% respectively. The continuous load will accelerate the bending resistance of damaged concrete specimens; the degradation effects on specimens of 500 h continuously in the environment with temperature of 40 ℃, humidity of 98% are larger than those of 150 freeze-thaw cycles.

参考文献/References:

相似文献/References:

[1]麻海燕,吴雅玲,余红发,等.机场道面除冰液作用下大掺量粉煤灰混凝土的抗冻性[J].建筑科学与工程学报,2014,31(02):78.
 [J].Journal of Architecture and Civil Engineering,2014,31(04):78.
[2]马志鸣,赵铁军,巴光忠,等.冻融环境下引气混凝土的抗钢筋锈蚀能力研究[J].建筑科学与工程学报,2014,31(03):85.
 MA Zhi-ming,ZHAO Tie-jun,BA Guang-zhong,et al.Study on Ability of Resistance to Steel Corrosion of Air Entraining Concrete Under Freezethaw Environment[J].Journal of Architecture and Civil Engineering,2014,31(04):85.
[3]杨 进,霍静思,肖 岩.基于梁式试验法的CFRP布与钢材界面-动态粘结性能研究[J].建筑科学与工程学报,2015,32(02):98.
 YANG Jin,HUO Jing-si,XIAO Yan.Research on Dynamic Bond Behavior of CFRP Sheet-steel Interface Based on Beam Test Method[J].Journal of Architecture and Civil Engineering,2015,32(04):98.
[4]刘荣桂,许兆辉,黄俊捷,等.碳粉掺量对碳纤维筋材力阻效应的影响[J].建筑科学与工程学报,2016,33(05):29.
 LIU Rong-gui,XU Zhao-hui,HUANG Jun-jie,et al.Effect of Carbon Powder Dosage on CFRP Tendon Piezoresistivity[J].Journal of Architecture and Civil Engineering,2016,33(04):29.
[5]洪 雷,马腾龙,王苏岩.湿热环境下预应力CFRP加固高强混凝土的耐久性[J].建筑科学与工程学报,2017,34(01):25.
 HONG Lei,MA Teng-long,WANG Su-yan.Durability of High Strength Concrete Strengthened with Prestressed CFRP Under Wet-thermal Environments[J].Journal of Architecture and Civil Engineering,2017,34(04):25.
[6]石昌文,何化南,董海,等.新型CFRP抗弯加固方法的试验研究[J].建筑科学与工程学报,2011,28(01):76.
 SHI Chang-wen,HE Hua-nan,DONG Hai,et al.Experiment Research on New Method of Flexural Strengthened with CFRP[J].Journal of Architecture and Civil Engineering,2011,28(04):76.
[7]刘荣桂,李明君,蔡东升,等.CFRP筋锚固体系研究与应用现状[J].建筑科学与工程学报,2012,29(02):14.
 LIU Rong-gui,LI Ming-jun,CAI Dong-sheng,et al.Research and Application Situation of CFRP Tendon Anchorage System[J].Journal of Architecture and Civil Engineering,2012,29(04):14.
[8]王苏岩,余文华,曹怀超,等.CFRP加固高强混凝土方柱的延性性能试验分析与计算[J].建筑科学与工程学报,2012,29(02):21.
 WANG Su-yan,YU Wen-hua,CAO Huai-chao,et al.Experiment Analysis and Calculation on Ductility Behaviors of High-strength RC Square Columns Strengthened with CFRP[J].Journal of Architecture and Civil Engineering,2012,29(04):21.
[9]洪 雷,太永伟.预应力CFRP加固高强混凝土梁试验[J].建筑科学与工程学报,2018,35(06):66.
 Experiment of Prestressed CFRP Reinforced High Strength Concrete Beams.[J].Journal of Architecture and Civil Engineering,2018,35(04):66.
[10]王苏岩,宋泽林,丁 荔.冻融循环与持载对CFRP加固高强混凝土梁变形性能的影响[J].建筑科学与工程学报,2017,34(02):26.
 WANG Su-yan,SONG Ze-lin,DING Li.Influence of Freeze-thaw Cycles and Sustained Loads on Deformation Performance of High Strength Concrete Beam Strengthened with CFRP[J].Journal of Architecture and Civil Engineering,2017,34(04):26.

备注/Memo

备注/Memo:
更新日期/Last Update: 2018-07-18