Open AccessPerformance of CFRP Anchors under Dynamic Loading
Author(s) -
Yubao Zhou,
Yujue Zhou,
Yonglai Zheng
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/304/3/032080
Subject(s) - serviceability (structure) , materials science , structural engineering , anchoring , reinforcement , residual , monotonic function , carbon fiber reinforced polymer , composite material , reinforced concrete , computer science , engineering , mathematical analysis , mathematics , algorithm
This paper presents an experimental study of reinforced concrete beams strengthened with CFRP laminates and anchored with carbon fibre anchors under monotonic static and cyclic loading. To gain full advantage of externally bonded CFRP technique, it is important to avoid premature debonding of the laminates, and CFRP anchors have the potential to prevent this happening by transferring the stress from steel reinforcement to the laminates. In this study, cyclic tests were conducted to investigate the fatigue behaviour of the strengthened beams and to identify strengthening effects of various anchoring depths. The aim of the monotonic tests was to determine strengthening efficiency of the new anchoring technique and to evaluate serviceability and ultimate states of the beams. According to the results, a damage index was proposed based on fractal analysis of cracks under cyclic loading and validated through ultrasonic inspection analysis. In addition, an empirical equation between average reduction of ultrasonic wave velocity and residual bearing capacity was established.