scholarly journals Long-term performance of GFRP bars in concrete elements under sustained load and environmental actions

2018 ◽  
Vol 190 ◽  
pp. 20-31 ◽  
Author(s):  
Hamed Fergani ◽  
Matteo Di Benedetti ◽  
Cristina Miàs Oller ◽  
Cyril Lynsdale ◽  
Maurizio Guadagnini
Keyword(s):  
Sustained Load ◽  
Gfrp Bars ◽  
Environmental Actions ◽  
Long Term Performance ◽  
Term Performance ◽  
Concrete Elements

scholarly journals Prediction of the Long-Term Performance and Durability of GFRP Bars under the Combined Effect of a Sustained Load and Severe Environments

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2341 ◽  
Author(s):  
Jianwei Tu ◽  
Hua Xie ◽  
Kui Gao
Keyword(s):  
Stress Level ◽  
Degradation Mechanism ◽  
Sustained Load ◽  
Research Results ◽  
Gfrp Bars ◽  
Sustained Loads ◽  
Long Term Performance ◽  
Term Performance ◽  
Durability Performance

With the continuous development of production technology, the performance of glass-fiber-reinforced polymer (GFRP) bars is also changing, and some design codes are no longer applicable to new materials based on previous research results. In this study, a series of durability tests were carried out on a new generation of GFRP bars in laboratory-simulated seawater and a concrete environment under different temperatures and sustained loads. The durability performance of GFRP bars was investigated by analysing the residual tensile properties. The degradation mechanism of GFRP bars was also analysed by scanning electronic microscopy (SEM). Furthermore, the long-term performance of GFRP bars exposed to concrete pore solution under different stress levels was predicted using Arrhenius theory. The research results show that the degradation rate of GFRP bars was increased significantly at a 40% stress level. By comparing the test results, design limits, and other scholars’ research results, it is demonstrated that the GFRP bars used in this test have a good durability performance. It is found that the main degradation mechanism of the GFRP bars is the debonding at the fiber-matrix interface. In the range test, the effects of a 20% stress level on the degradation of GFRP bars were not obvious. However, the long-term performance prediction results show that when the exposure time was long enough, the degradation processes were accelerated by a 20% stress level.

Long-Term Performance Prediction of GFRP Bar in Moist Concrete under Sustained Loads

2011 ◽  
Vol 255-260 ◽  
pp. 3119-3123 ◽  
Author(s):  
Jian Wei Huang
Keyword(s):  
Tensile Strength ◽  
Temperature Shift ◽  
Strength Loss ◽  
Sustained Load ◽  
Gfrp Bar ◽  
Sustained Loads ◽  
Reported Data ◽  
Long Term Performance ◽  
Term Performance

In this paper, the tensile strength retention of GFRP bars embedded in moist concrete under sustained loads is discussed on the basis of reported data. Long-term performance of GFRP bar is predicted by a newly developed model through time-temperature shift and time extrapolation approaches. Results indicated that higher temperature and longer exposure time result in more tensile strength loss of the sustained GFRP bar in moist concrete. Above certain temperature, GFRP bar in moist concrete with about 20% sustained load fails in rupture of GFRP bar for 75-year design lifetime. The temperature effect shall be taken into account in the design codes/guidelines.

Fine Particle Mass Monitoring with Low-Cost Sensors: Corrections and Long-Term Performance Evaluation

2019 ◽  
Author(s):  
Carl Malings ◽  
Rebecca Tanzer ◽  
Aliaksei Hauryliuk ◽  
Provat K. Saha ◽  
Allen L. Robinson ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fine Particle ◽  
Low Cost ◽  
Particle Mass ◽  
Long Term Performance ◽  
Term Performance

Long-term performance of the Hancock bioprosthetic conduit for aortic root replacement

2008 ◽  
Vol 56 (S 1) ◽  
Author(s):  
CC Badiu ◽  
W Eichinger ◽  
D Ruzicka ◽  
I Hettich ◽  
S Bleiziffer ◽  
...  
Keyword(s):  
Aortic Root ◽  
Aortic Root Replacement ◽  
Long Term Performance ◽  
Term Performance
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