Method of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates

The cables of high-strength carbon fiber reinforced polymer (CFRP) plates are starting to be applied to large spatial structures. However, their main anchorage systems rely on the adhesive force, which entails risks to their integrity resulting from aging of the binding agent. In this study, a frict...

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Autores principales:	Wanxu Zhu, Wei Wei, Fengrong Liu, Rong Zeng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	CFRP plate friction-based anchor anchorage mechanism anti-slip stress redistribution Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/d6855fe7665642179ea3779908735b93
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spelling	oai:doaj.org-article:d6855fe7665642179ea3779908735b932021-11-11T18:01:10ZMethod of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates10.3390/ma142164431996-1944https://doaj.org/article/d6855fe7665642179ea3779908735b932021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6443https://doaj.org/toc/1996-1944The cables of high-strength carbon fiber reinforced polymer (CFRP) plates are starting to be applied to large spatial structures. However, their main anchorage systems rely on the adhesive force, which entails risks to their integrity resulting from aging of the binding agent. In this study, a friction-based wedge anchorage system was designed for CFRP plates. The working mechanism of the proposed anchorage system was explored both theoretically and experimentally. The anti-slip mechanism and condition of CFRP plates were formulated so that the equivalent frictional angle of the contact surface between a CFRP plate and wedges must not be smaller than the sum of the dip angle of the wedge external conical surface and the frictional angle between the wedges and barrel. An analysis of the stress distribution in the anchorage zone of the CFRP plate was conducted using the Tsai-Wu failure criterion, which concluded that the compressive stresses should be reduced on the section closer to the load-bearing end of the anchorage system. Furthermore, the anchorage efficiency coefficient was proposed, which depends on stress concentration coefficients, plate thickness, length of anchorage zone, dip angle of wedge external conical surface, and its frictional angle. Then, it was determined that the minimum length of an anchorage zone for the CFRP plates with various specifications should be at least 49 times larger than the CFRP thickness. A finite element analysis and static tensile tests on six specimens were carried out. The experimental results revealed that the anchorage efficiency coefficient of the optimized anchor reached 97.9%.Wanxu ZhuWei WeiFengrong LiuRong ZengMDPI AGarticleCFRP platefriction-based anchoranchorage mechanismanti-slipstress redistributionTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6443, p 6443 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CFRP plate friction-based anchor anchorage mechanism anti-slip stress redistribution Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	CFRP plate friction-based anchor anchorage mechanism anti-slip stress redistribution Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Wanxu Zhu Wei Wei Fengrong Liu Rong Zeng Method of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates
description	The cables of high-strength carbon fiber reinforced polymer (CFRP) plates are starting to be applied to large spatial structures. However, their main anchorage systems rely on the adhesive force, which entails risks to their integrity resulting from aging of the binding agent. In this study, a friction-based wedge anchorage system was designed for CFRP plates. The working mechanism of the proposed anchorage system was explored both theoretically and experimentally. The anti-slip mechanism and condition of CFRP plates were formulated so that the equivalent frictional angle of the contact surface between a CFRP plate and wedges must not be smaller than the sum of the dip angle of the wedge external conical surface and the frictional angle between the wedges and barrel. An analysis of the stress distribution in the anchorage zone of the CFRP plate was conducted using the Tsai-Wu failure criterion, which concluded that the compressive stresses should be reduced on the section closer to the load-bearing end of the anchorage system. Furthermore, the anchorage efficiency coefficient was proposed, which depends on stress concentration coefficients, plate thickness, length of anchorage zone, dip angle of wedge external conical surface, and its frictional angle. Then, it was determined that the minimum length of an anchorage zone for the CFRP plates with various specifications should be at least 49 times larger than the CFRP thickness. A finite element analysis and static tensile tests on six specimens were carried out. The experimental results revealed that the anchorage efficiency coefficient of the optimized anchor reached 97.9%.
format	article
author	Wanxu Zhu Wei Wei Fengrong Liu Rong Zeng
author_facet	Wanxu Zhu Wei Wei Fengrong Liu Rong Zeng
author_sort	Wanxu Zhu
title	Method of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates
title_short	Method of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates
title_full	Method of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates
title_fullStr	Method of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates
title_full_unstemmed	Method of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates
title_sort	method of designing a friction-based wedge anchorage system for high-strength cfrp plates
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d6855fe7665642179ea3779908735b93
work_keys_str_mv	AT wanxuzhu methodofdesigningafrictionbasedwedgeanchoragesystemforhighstrengthcfrpplates AT weiwei methodofdesigningafrictionbasedwedgeanchoragesystemforhighstrengthcfrpplates AT fengrongliu methodofdesigningafrictionbasedwedgeanchoragesystemforhighstrengthcfrpplates AT rongzeng methodofdesigningafrictionbasedwedgeanchoragesystemforhighstrengthcfrpplates
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Method of Designing a Friction-Based Wedge Anchorage System for High-Strength CFRP Plates

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