摘要
为研究高温后GFRP方管力学性能的退化规律,截取GFRP方管局部制成试件,通过20~400℃温度的拉伸、压缩试验,分析高温后GFRP试件的力学性能变化与破坏模式,并结合Weibull模型对高温后GFRP试件的拉伸、压缩强度进行统计分析。结果表明:GFRP试件在400℃后的颜色与形状发生显著变化,试件强度和弹性模量在温度低于300℃时变化较小,而400℃后出现急剧退化。Weibull模型量化了GFRP试件力学性能随温度变化的累积失效概率,为评估高温后GFRP管材性能退化离散性提供了参考。
In order to study the degradation of mechanical properties of GFRP square pipe after high temperature, GFRP square pipe was intercepted and partially made into specimens, and the mechanical property changes and damage patterns of GFRP specimens after elevated temperature were analyzed by elevated temperature and tensile and compression tests from 20 ℃ to 400 ℃, and the tensile and compressive strength of GFRP specimens after elevated temperature were statistically analyzed by combining with Weibull model. The results showed that the color and shape of GFRP specimens changed significantly after 400 ℃, and the strength and elastic modulus of the specimens changed less at temperatures below 300 ℃ and degraded sharply at 400 ℃. The Weibull model quantified the cumulative probability of failure of the mechanical properties of GFRP specimens with temperature, and provided a reference for assessing the discrete property degradation of GFRP pipe after elevated temperature.
作者
李猛
宗钟凌
谢青海
顾靖
李珂珂
LI Meng;ZONG Zhongling;XIE Qinghai;GU Jing;LI Keke(School of Civil and Harbor Engineering,Jiangsu Ocean University,Lianyungang 222005,China;Jiangsu Ocean Engineering Research Center for Intelligent Infrastructure Construction,Lianyungang 222002,China)
出处
《江苏海洋大学学报（自然科学版）》
CAS
2022年第3期57-62,共6页
Journal of Jiangsu Ocean University:Natural Science Edition
基金
江苏海洋大学研究生科研与实践创新计划项目(KYCX2021-029,KYCX2021-093)
江苏海洋大学研究生暑期社会实践项目(YSH202202X)。
关键词
GFRP
力学性能
高温
性能退化
GFRP
mechanical properties
elevated temperature
property degradation
