[1]代力,江祥林,何雄君.混凝土环境中GFRP筋抗拉性能加速老化试验研究[J].西安建筑科技大学学报(自然科学版),2019,51(03):383-388.[doi:10.15986/j.1006-7930.2019.03.012]
　DAI Li,JIANG Xianglin,HE Xiongjun.Accelerated aging tests for evaluations of tensile properties of GFRP bars embedded in concrete beams[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(03):383-388.[doi:10.15986/j.1006-7930.2019.03.012]
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混凝土环境中GFRP筋抗拉性能加速老化试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年03期
页码:
383-388
栏目:
出版日期:
2019-06-30

文章信息/Info

Title:
Accelerated aging tests for evaluations of tensile properties of GFRP bars embedded in concrete beams
文章编号:
1006-7930(2019)03-0383-06
作者:
代力1; 2; 江祥林1; 何雄君3
（1.江西省交通科学研究院，江西 南昌 330200；2.长大桥梁建设关键技术及装备交通运输行业研发中心，江西 南昌 330200；3.武汉理工大学 交通学院，湖北 武汉 430063）
Author(s):
DAI Li1; 2;  JIANG Xianglin1;  HE Xiongjun3
(1. Jiangxi Transportion Institute, Nanchang 330300, China；2.Research and Development Center on Technologies and Equipment of Long-span Bridge Construction Ministry of Transport, Nanchang 330300, China；3.School of Transportation, Wuhan University of Technology, Wuhan 430063, China)
关键词:
混凝土环境; GFRP筋; 持续荷载; 抗拉强度; 预测模型
Keywords:
concrete environment; GFRP bar; sustained load; tensile strength; prediction model
分类号:
TU502+.6
DOI:
10.15986/j.1006-7930.2019.03.012
文献标志码:
A
摘要:
采用加速老化试验方法对混凝土碱性环境中GFRP筋抗拉性能进行了研究.将112根GFRP筋混凝土试件分为6组，试验参数包括持续荷载、温度和侵蚀时间.试验结果表明，混凝土环境中GFRP筋抗拉强度在早期退化较快，试件在40 ℃、60 ℃环境中浸泡30 d后GFRP筋抗拉强度分别下降了5.4%和13.7%；温度的升高加速了混凝土环境中GFRP筋抗拉强度的退化速率；持续荷载水平对GFRP筋抗拉强度退化有较大影响，且随着温度的升高，持续荷载所造成退化的效果愈加显著；最后，基于Arrhenius方程建立了实际混凝土环境下GFRP筋长期抗拉强度预测模型，并对北京、武汉和广州等地区实际混凝土环境中GFRP筋抗拉强度保留率进行了预测.
Abstract:
The accelerated aging tests for evaluations of tensile strength of glass fiber reinforced polymer (GFRP) bars embedded in concrete environment under sustained load were conducted. 112 GFRP reinforcement concrete specimens were used in the test and divided into 6 groups, test parameters include sustained load, temperature and exposed time. The results show that the tensile strength of GFRP bar embedded in concrete environment degraded rapidly at an early age. The specimen after being exposed to concrete environment for 30 days at 40 ℃ and 60 ℃, tensile strength of GFRP bar decreased by 5.4% and 13.7% respectively. The high temperature accelerated degradation rate of tensile strength of GFRP bars embedded in concrete environment. The tensile strength of GFRP is more affected by higher sustained load, and with the increase of temperature, the degradation effect is more significant caused by sustained load. Finally, based on the Arrhenius equation, tensile strength prediction model of GFRP bars under real concrete environment was proposed, and predicted the tensile strength retention of GFRP bars under real concrete environment on Beijing, Wuhan, and Guangzhou respectively.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-08-30修改稿日期:2019-05-06
基金项目:国家自然科学基金项目（51178361）；江西省交通运输厅科技基金项目（2017C0002）
第一作者:代力（1987-），男，博士，研究方向为FRP材料在土木工程中的应用. E-mail:dl-1987@qq.com
更新日期/Last Update: 2019-07-21