Cargando…

Experimental and Numerical Study on Interface Bond Strength and Anchorage Performance of Steel Bars within Prefabricated Concrete

This study investigates the interface bond strength and anchorage performance of steel bars within prefabricated concrete. Twenty-two specimens were designed and manufactured to study the interface bond behavior of deformed and plain steel bars under a larger cover thickness. Diameter of steel bars,...

Descripción completa

Detalles Bibliográficos
Autores principales: Hu, Zhijian, Shah, Yasir Ibrahim, Yao, Pengfei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269920/
https://www.ncbi.nlm.nih.gov/pubmed/34279282
http://dx.doi.org/10.3390/ma14133713
_version_ 1783720693350793216
author Hu, Zhijian
Shah, Yasir Ibrahim
Yao, Pengfei
author_facet Hu, Zhijian
Shah, Yasir Ibrahim
Yao, Pengfei
author_sort Hu, Zhijian
collection PubMed
description This study investigates the interface bond strength and anchorage performance of steel bars within prefabricated concrete. Twenty-two specimens were designed and manufactured to study the interface bond behavior of deformed and plain steel bars under a larger cover thickness. Diameter of steel bars, strength grade of concrete, and anchorage length were considered influential factors. The finite element method (ABAQUS) was used for the validation of experimental results. The interface bond’s failure mechanism and the anchorage length in the prefabricated concrete under different concrete strength levels were explored and compared to national and international codes. A suitable value of the basic anchoring length for the prefabricated structure was recommended. The results show that the interface bond strength of prefabricated bridge members is directly proportional to the strength grade of the concrete, inversely proportional to the reinforcement diameter, and less related to anchorage length. The effect of the cover thickness of the surrounding concrete is negligible. Conversely, the bearing capacity of prefabricated bridge members depends on the strength of the concrete, the diameter of the steel bar, and the anchorage length. Furthermore, it is concluded that the mechanical bond strength accounts for 88% of the bond strength within prefabricated concrete.
format Online
Article
Text
id pubmed-8269920
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-82699202021-07-10 Experimental and Numerical Study on Interface Bond Strength and Anchorage Performance of Steel Bars within Prefabricated Concrete Hu, Zhijian Shah, Yasir Ibrahim Yao, Pengfei Materials (Basel) Article This study investigates the interface bond strength and anchorage performance of steel bars within prefabricated concrete. Twenty-two specimens were designed and manufactured to study the interface bond behavior of deformed and plain steel bars under a larger cover thickness. Diameter of steel bars, strength grade of concrete, and anchorage length were considered influential factors. The finite element method (ABAQUS) was used for the validation of experimental results. The interface bond’s failure mechanism and the anchorage length in the prefabricated concrete under different concrete strength levels were explored and compared to national and international codes. A suitable value of the basic anchoring length for the prefabricated structure was recommended. The results show that the interface bond strength of prefabricated bridge members is directly proportional to the strength grade of the concrete, inversely proportional to the reinforcement diameter, and less related to anchorage length. The effect of the cover thickness of the surrounding concrete is negligible. Conversely, the bearing capacity of prefabricated bridge members depends on the strength of the concrete, the diameter of the steel bar, and the anchorage length. Furthermore, it is concluded that the mechanical bond strength accounts for 88% of the bond strength within prefabricated concrete. MDPI 2021-07-02 /pmc/articles/PMC8269920/ /pubmed/34279282 http://dx.doi.org/10.3390/ma14133713 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hu, Zhijian
Shah, Yasir Ibrahim
Yao, Pengfei
Experimental and Numerical Study on Interface Bond Strength and Anchorage Performance of Steel Bars within Prefabricated Concrete
title Experimental and Numerical Study on Interface Bond Strength and Anchorage Performance of Steel Bars within Prefabricated Concrete
title_full Experimental and Numerical Study on Interface Bond Strength and Anchorage Performance of Steel Bars within Prefabricated Concrete
title_fullStr Experimental and Numerical Study on Interface Bond Strength and Anchorage Performance of Steel Bars within Prefabricated Concrete
title_full_unstemmed Experimental and Numerical Study on Interface Bond Strength and Anchorage Performance of Steel Bars within Prefabricated Concrete
title_short Experimental and Numerical Study on Interface Bond Strength and Anchorage Performance of Steel Bars within Prefabricated Concrete
title_sort experimental and numerical study on interface bond strength and anchorage performance of steel bars within prefabricated concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269920/
https://www.ncbi.nlm.nih.gov/pubmed/34279282
http://dx.doi.org/10.3390/ma14133713
work_keys_str_mv AT huzhijian experimentalandnumericalstudyoninterfacebondstrengthandanchorageperformanceofsteelbarswithinprefabricatedconcrete
AT shahyasiribrahim experimentalandnumericalstudyoninterfacebondstrengthandanchorageperformanceofsteelbarswithinprefabricatedconcrete
AT yaopengfei experimentalandnumericalstudyoninterfacebondstrengthandanchorageperformanceofsteelbarswithinprefabricatedconcrete