We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Mechanical Test of Sleeve Grouted Lapping Connectors under Uniaxial Tension and High-Stress Repeated Tension and Compression Loading.
- Authors
Yu, Qiong; Tang, Peiyan; Tang, Ziming; Zhang, Xingkui; Fan, Baoxiu; Zhang, Zhi; Chen, Zhenhai
- Abstract
Featured Application: The grouted sleeve lapping connector proposed in this work has many advantages, including low cost, ease of construction, simple grout compaction, and a large diameter of the sleeve, and it can be used in precast concrete structures for resisting earthquakes and wind loads. In this study, uniaxial tension tests and high-stress repeated tension and compression tests were conducted on 32 APC (all vertical members precast in concrete structures) connectors. After high-stress repeated tension and compression, the bearing capacities of the connector specimens improved due to the strengthening of the steel bars, and the ductility of the specimens was reduced due to the further development of cracks between the steel bars and the grout. The residual deformation values of the specimens, namely u0 (uniaxial tension) and u20 (repeated tension and compression), were reduced with the increase in the lapping length of the specimens. The longitudinal compressive strain and hoop tensile strain of the middle section of the sleeve near the steel bar side were reduced under the ultimate load state when the specimens were stretched under uniaxial tension and in the last tension process after repeated loading with the increase in the lapping length. The distribution and development of the longitudinal compression stress of the sleeve were analysed based on the bonding stress of the steel bar and concrete. Finally, the ultimate bonding strength and critical lapping length formulas were proposed, which involved the introduction of a grouting defect coefficient ω.
- Subjects
COMPRESSION loads; TENSION loads; PRECAST concrete; STEEL bars; GROUTING; WIND pressure; EARTHQUAKES
- Publication
Applied Sciences (2076-3417), 2022, Vol 12, Issue 13, pN.PAG
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app12136736