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Experimental Study and Failure Criterion Analysis on Combined Compression-Shear Performance of Self-Compacting Concrete

To investigate the combined compression-shear performance of self-compacting concrete (SCC), eight groups of concrete specimens under different axial compression ratios were designed, and the composite performance under different axial stresses was carried out by hydraulic servo machine. The uniaxia...

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Autores principales: Wang, Jingrong, Xie, Faxiang, Zhang, Chuanlong, Ruan, Jing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7040608/
https://www.ncbi.nlm.nih.gov/pubmed/32033306
http://dx.doi.org/10.3390/ma13030713
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author Wang, Jingrong
Xie, Faxiang
Zhang, Chuanlong
Ruan, Jing
author_facet Wang, Jingrong
Xie, Faxiang
Zhang, Chuanlong
Ruan, Jing
author_sort Wang, Jingrong
collection PubMed
description To investigate the combined compression-shear performance of self-compacting concrete (SCC), eight groups of concrete specimens under different axial compression ratios were designed, and the composite performance under different axial stresses was carried out by hydraulic servo machine. The uniaxial and tensile splitting strength of SCC were also included in the study. The failure modes of SCC were presented, discussed, and compared with normal concrete (NC). The characteristic points of stress-strain curves of SCC specimens from the experiments were extracted and analyzed under different axial compression stress. Based on the experimental results, the shear strength of compression-shear load was divided into cohesive stress and residual friction stress. The variation of residual stress and cohesive stress under the combined compression-shear stress was analyzed, and the relationship was obtained by numerical regression. Research results indicated that the residual stress increases linearly with the compression stress while the cohesive stress increased at first and then decreased. The research found that the friction coefficient of SCC was much smaller than NC due to the lack of interlocking effect. Utilizing the compression-shear strength of SCC, the material failure criteria of SCC were proposed from the view of shear failure strength and octahedral stress space, which could fit the experimental results confidently following the mathematical regression analysis. The comparison with data from other literature shows favorable consistence with the obtained criteria. The results of the study could be beneficial complement in engineering practices where SCC was applicable.
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spelling pubmed-70406082020-03-09 Experimental Study and Failure Criterion Analysis on Combined Compression-Shear Performance of Self-Compacting Concrete Wang, Jingrong Xie, Faxiang Zhang, Chuanlong Ruan, Jing Materials (Basel) Article To investigate the combined compression-shear performance of self-compacting concrete (SCC), eight groups of concrete specimens under different axial compression ratios were designed, and the composite performance under different axial stresses was carried out by hydraulic servo machine. The uniaxial and tensile splitting strength of SCC were also included in the study. The failure modes of SCC were presented, discussed, and compared with normal concrete (NC). The characteristic points of stress-strain curves of SCC specimens from the experiments were extracted and analyzed under different axial compression stress. Based on the experimental results, the shear strength of compression-shear load was divided into cohesive stress and residual friction stress. The variation of residual stress and cohesive stress under the combined compression-shear stress was analyzed, and the relationship was obtained by numerical regression. Research results indicated that the residual stress increases linearly with the compression stress while the cohesive stress increased at first and then decreased. The research found that the friction coefficient of SCC was much smaller than NC due to the lack of interlocking effect. Utilizing the compression-shear strength of SCC, the material failure criteria of SCC were proposed from the view of shear failure strength and octahedral stress space, which could fit the experimental results confidently following the mathematical regression analysis. The comparison with data from other literature shows favorable consistence with the obtained criteria. The results of the study could be beneficial complement in engineering practices where SCC was applicable. MDPI 2020-02-05 /pmc/articles/PMC7040608/ /pubmed/32033306 http://dx.doi.org/10.3390/ma13030713 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Jingrong
Xie, Faxiang
Zhang, Chuanlong
Ruan, Jing
Experimental Study and Failure Criterion Analysis on Combined Compression-Shear Performance of Self-Compacting Concrete
title Experimental Study and Failure Criterion Analysis on Combined Compression-Shear Performance of Self-Compacting Concrete
title_full Experimental Study and Failure Criterion Analysis on Combined Compression-Shear Performance of Self-Compacting Concrete
title_fullStr Experimental Study and Failure Criterion Analysis on Combined Compression-Shear Performance of Self-Compacting Concrete
title_full_unstemmed Experimental Study and Failure Criterion Analysis on Combined Compression-Shear Performance of Self-Compacting Concrete
title_short Experimental Study and Failure Criterion Analysis on Combined Compression-Shear Performance of Self-Compacting Concrete
title_sort experimental study and failure criterion analysis on combined compression-shear performance of self-compacting concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7040608/
https://www.ncbi.nlm.nih.gov/pubmed/32033306
http://dx.doi.org/10.3390/ma13030713
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