聚合物基体类型对海水海砂混凝土环境下GFRP筋层间剪切强度影响

doi:10.16183/j.cnki.jsjtu.2024.100

上海交通大学学报 ›› 2026, Vol. 60 ›› Issue (3): 452-462.doi: 10.16183/j.cnki.jsjtu.2024.100

聚合物基体类型对海水海砂混凝土环境下GFRP筋层间剪切强度影响

赵烜¹^,²^,³, 赵齐⁴, 张大旭¹^,²^,³(), 张沛涪¹^,²^,³

¹ 上海交通大学船舶海洋与建筑工程学院, 上海 200240
² 上海交通大学海洋工程国家重点实验室, 上海 200240
³ 上海交通大学上海市公共建筑和基础设施数字化运维重点实验室, 上海 200240
⁴ 香港理工大学土木及环境工程学系, 香港 999077

收稿日期:2024-03-22 修回日期:2024-05-13 接受日期:2024-05-29 出版日期:2026-03-28 发布日期:2026-03-30
通讯作者: 张大旭,教授,博士生导师;E-mail:daxu.zhang@sjtu.edu.cn.
作者简介:赵烜(1999—),硕士生,从事复合材料力学与纤维增强聚合物的损伤研究.

Effects of Polymer Matrices on Interlaminar Shear Strength of GFRP Rebars in Seawater Sea-Sand Concrete Environment

ZHAO Xuan¹^,²^,³, ZHAO Qi⁴, ZHANG Daxu¹^,²^,³(), ZHANG Peifu¹^,²^,³

¹ School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
² State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
³ Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai Jiao Tong University, Shanghai 200240, China
⁴ Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China

Received:2024-03-22 Revised:2024-05-13 Accepted:2024-05-29 Online:2026-03-28 Published:2026-03-30

1. 2024-100-附录.pdf(54242KB)

摘要/Abstract

摘要：

为研究不同基体类型的玻璃纤维增强聚合物(GFRP)筋在海水海砂混凝土(SWSSC)环境下的层间剪切强度(ILSS)退化规律与性能劣化机理,对环氧基和乙烯基GFRP筋进行了SWSSC模拟孔溶液环境下加速腐蚀试验,以及层间剪切与扫描电镜(SEM)检测,其中环氧基GFRP筋分别采用甲基六氢化邻苯二甲酸酐(MHHPA)与二氨基二苯甲烷(MDA)两种固化剂固化.结果表明: MHHPA固化环氧基GFRP筋的初始层间剪切强度最高(42.44 MPa),乙烯基GFRP筋次之(37.10 MPa),MDA固化环氧基GFRP筋的初始层间剪切强度最低(27.20 MPa).在55 ℃的孔溶液中浸泡84 d后,MHHPA固化环氧基GFRP筋的层间剪切强度保留率仅为7.43%,MDA固化环氧基GFRP筋的强度保留率为39.51%,而乙烯基GFRP筋的保留率则有71.06%.3种GFRP筋的层间剪切强度均随SWSSC模拟孔溶液温度和浸泡时间的增加呈下降趋势,强度退化的主要原因为纤维-基体的界面脱黏以及基体的水解流失.乙烯基GFRP筋对SWSSC模拟孔溶液的抗腐蚀能力最强,MHHPA固化环氧基GFRP筋的最弱,MDA固化环氧基GFRP筋则介于两者之间.

关键词: 纤维增强聚合物, 海水海砂混凝土, 层间剪切强度, 基体类型, 性能退化

Abstract:

To investigate the degradation laws and deterioration mechanisms of interlaminar shear strength (ILSS) of glass fiber reinforced polymer (GFRP) rebars with different matrices in seawater and sea-sand concrete (SWSSC) environment, an accelerated corrosion test was conducted on epoxy-based and vinyl ester-based GFRP rebar specimens in a simulated SWSSC pore solution, and then the ILSS tests and scanning electron microscope (SEM) tests were conducted. For epoxy-based GFRP rebars, two kinds of curing agents naming MHHPA and MDA were adopted. The results indicate that the uncorroded MHHPA cured epoxy-based GFRP rebars possesse the highest initial ILSS (42.44 MPa), followed by the vinyl ester-based GFRP rebars (37.10 MPa), while the MDA cured epoxy-based GFRP rebars have the lowest initial ILSS (27.20 MPa). After immersion in a 55 ℃ pore solution environment for 84 d, the ILSS retention of MHHPA cured epoxy-based GFRP rebars is 7.43% while the ILSS retention of MDA cured epoxy-based GFRP and vinyl ester-based GFRP rebars are 39.51% and 71.06% respectively. With the increase in temperature and immersion time in the SWSSC simulated pore solution, the ILSS of three kinds of GFRP rebars all show a declining trend. The reasons for the degradation of ILSS are the interfacial debonding between fibers and matrix and the hydrolytic loss of the matrix. Among the tested specimens, the vinyl ester-based GFRP rebars exhibit the strongest resistance to corrosion in the simulated SWSSC pore solution, while the MHHPA cured epoxy-based GFRP rebars show the weakest resistance with the MDA cured epoxy-based GFRP rebars being intermediate.

Key words: fiberreinforced polymer (FRP), seawater and sea-sand concrete (SWSSC), interlaminar shear strength (ILSS), matrix type, property degradation

中图分类号:

TU599

赵烜, 赵齐, 张大旭, 张沛涪. 聚合物基体类型对海水海砂混凝土环境下GFRP筋层间剪切强度影响[J]. 上海交通大学学报, 2026, 60(3): 452-462.

ZHAO Xuan, ZHAO Qi, ZHANG Daxu, ZHANG Peifu. Effects of Polymer Matrices on Interlaminar Shear Strength of GFRP Rebars in Seawater Sea-Sand Concrete Environment[J]. Journal of Shanghai Jiao Tong University, 2026, 60(3): 452-462.

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组分质量浓度/(g·L^-1)				pH
NaOH	KOH	Ca(OH)₂	NaCl	pH
2.4	19.6	2	35	13.4

GFRP筋种类	浸泡温度/℃	浸泡龄期
GFRP筋种类	浸泡温度/℃	21 d	42 d	63 d	84 d
MHHPA固化环氧基	25	G/E T25D21	G/E T25D42	G/E T25D63	G/E T25D84
	40	G/E T40D21	G/E T40D42	G/E T40D63	G/E T40D84
	55	G/E T55D21	G/E T55D42	G/E T55D63	G/E T55D84
MDA固化环氧基	25	G/P T25D21	G/P T25D42	G/P T25D63	G/P T25D84
	40	G/P T40D21	G/P T40D42	G/P T40D63	G/P T40D84
	55	G/P T55D21	G/P T55D42	G/P T55D63	G/P T55D84
乙烯基	25	G/V T25D21	G/V T25D42	G/V T25D63	G/V T25D84
	40	G/V T40D21	G/V T40D42	G/V T40D63	G/V T40D84
	55	G/V T55D21	G/V T55D42	G/V T55D63	G/V T55D84

聚合物基体类型对海水海砂混凝土环境下GFRP筋层间剪切强度影响

Effects of Polymer Matrices on Interlaminar Shear Strength of GFRP Rebars in Seawater Sea-Sand Concrete Environment

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