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Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement

Background: Shear damage of beams is typically brittle damage that is significantly more detrimental than flexural damage. Purpose: Based on the super-high toughness and good crack control ability of engineered cementitious composites (ECC), the shear performance of concrete–ECC beams was investigat...

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Autores principales: Cheng, Kai, Du, Yulin, Wang, Haiyan, Liu, Rui, Sun, Yu, Lu, Zhichao, Chen, Lingkun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456389/
https://www.ncbi.nlm.nih.gov/pubmed/37629997
http://dx.doi.org/10.3390/ma16165706
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author Cheng, Kai
Du, Yulin
Wang, Haiyan
Liu, Rui
Sun, Yu
Lu, Zhichao
Chen, Lingkun
author_facet Cheng, Kai
Du, Yulin
Wang, Haiyan
Liu, Rui
Sun, Yu
Lu, Zhichao
Chen, Lingkun
author_sort Cheng, Kai
collection PubMed
description Background: Shear damage of beams is typically brittle damage that is significantly more detrimental than flexural damage. Purpose: Based on the super-high toughness and good crack control ability of engineered cementitious composites (ECC), the shear performance of concrete–ECC beams was investigated by replacing a portion of the concrete in the tensile zone of reinforced concrete beams with ECC and employing high-strength reinforcing bars to design concrete–ECC beams. The purpose of this investigation is to elucidate and clarify the shear performance of concrete–ECC beams. Methodology/approach: Experimental and FE analyses were conducted on the shear performance of 36 webless reinforced concrete–ECC composite beams with varied concrete strengths, shear-to-span ratios, ECC thicknesses, and interfacial treatments between the layers. Results: The results indicate that the effect of the shear-to-span ratio is greater, the effect of the form of interface treatment is smaller, the effect is weakened after the ECC thickness is greater than 70 mm (i.e., the ratio of the replacement height to section height is approximately 0.35), the shear resistance is reduced when the hoop rate is greater, and the best shear resistance is obtained when the ECC 70 mm thickness and the hoop rate of 0.29% are used together. Conclusions: This study can serve as a technical reference for enhancing the problems of low durability and inadequate fracture control performance of RC beams in shear and as a guide for structural design research.
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spelling pubmed-104563892023-08-26 Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement Cheng, Kai Du, Yulin Wang, Haiyan Liu, Rui Sun, Yu Lu, Zhichao Chen, Lingkun Materials (Basel) Article Background: Shear damage of beams is typically brittle damage that is significantly more detrimental than flexural damage. Purpose: Based on the super-high toughness and good crack control ability of engineered cementitious composites (ECC), the shear performance of concrete–ECC beams was investigated by replacing a portion of the concrete in the tensile zone of reinforced concrete beams with ECC and employing high-strength reinforcing bars to design concrete–ECC beams. The purpose of this investigation is to elucidate and clarify the shear performance of concrete–ECC beams. Methodology/approach: Experimental and FE analyses were conducted on the shear performance of 36 webless reinforced concrete–ECC composite beams with varied concrete strengths, shear-to-span ratios, ECC thicknesses, and interfacial treatments between the layers. Results: The results indicate that the effect of the shear-to-span ratio is greater, the effect of the form of interface treatment is smaller, the effect is weakened after the ECC thickness is greater than 70 mm (i.e., the ratio of the replacement height to section height is approximately 0.35), the shear resistance is reduced when the hoop rate is greater, and the best shear resistance is obtained when the ECC 70 mm thickness and the hoop rate of 0.29% are used together. Conclusions: This study can serve as a technical reference for enhancing the problems of low durability and inadequate fracture control performance of RC beams in shear and as a guide for structural design research. MDPI 2023-08-20 /pmc/articles/PMC10456389/ /pubmed/37629997 http://dx.doi.org/10.3390/ma16165706 Text en © 2023 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
Cheng, Kai
Du, Yulin
Wang, Haiyan
Liu, Rui
Sun, Yu
Lu, Zhichao
Chen, Lingkun
Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement
title Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement
title_full Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement
title_fullStr Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement
title_full_unstemmed Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement
title_short Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement
title_sort experimental study of the shear performance of combined concrete–ecc beams without web reinforcement
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456389/
https://www.ncbi.nlm.nih.gov/pubmed/37629997
http://dx.doi.org/10.3390/ma16165706
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