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Investigating the Flexural Behavior of a Two-Span High-Performance Concrete Beam Using Experimentally Derived Stress Block Parameters

[Image: see text] High-performance concrete (HPC) is increasingly used in construction due to its superior strength and durability. However, current stress block parameters used for designing normal-strength concrete cannot be safely applied to HPC. To address this issue, new stress block parameters...

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Autores principales: Momin, Asif Iqbal A., Zende, Aijaz Ahmad, Khadiranaikar, Rajesab B., Alsabhan, Abdullah H., Alam, Shamshad, Khan, Mohammad Amir, Qamar, Mohammad Obaid
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10210026/
https://www.ncbi.nlm.nih.gov/pubmed/37251169
http://dx.doi.org/10.1021/acsomega.3c01197
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author Momin, Asif Iqbal A.
Zende, Aijaz Ahmad
Khadiranaikar, Rajesab B.
Alsabhan, Abdullah H.
Alam, Shamshad
Khan, Mohammad Amir
Qamar, Mohammad Obaid
author_facet Momin, Asif Iqbal A.
Zende, Aijaz Ahmad
Khadiranaikar, Rajesab B.
Alsabhan, Abdullah H.
Alam, Shamshad
Khan, Mohammad Amir
Qamar, Mohammad Obaid
author_sort Momin, Asif Iqbal A.
collection PubMed
description [Image: see text] High-performance concrete (HPC) is increasingly used in construction due to its superior strength and durability. However, current stress block parameters used for designing normal-strength concrete cannot be safely applied to HPC. To address this issue, new stress block parameters have been proposed through experimental works, which are used for designing HPC members. In this study, the behavior of HPC was investigated using these stress block parameters. Two-span beams made of HPC were tested under five-point bending, and an idealized stress block curve was derived from the experimental stress–strain curve for grades 60, 80, and 100 MPa. Based on the stress block curve, equations for the ultimate moment of resistance, depth of the neutral axis, limiting moment of resistance, and maximum depth of the neutral axis were proposed. An idealized load–deformation curve was also developed, which identified four significant events: first cracking, yielding of reinforced steel, crushing of concrete with spalling of cover, and ultimate failure. The predicted values were found to be in good agreement with the experimental values, and the average location of the first crack was identified to be 0.270 L, measured from the central support on either side of the span. These findings provide important insights for the design of HPC structures, contributing to the development of more resilient and durable infrastructure.
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spelling pubmed-102100262023-05-26 Investigating the Flexural Behavior of a Two-Span High-Performance Concrete Beam Using Experimentally Derived Stress Block Parameters Momin, Asif Iqbal A. Zende, Aijaz Ahmad Khadiranaikar, Rajesab B. Alsabhan, Abdullah H. Alam, Shamshad Khan, Mohammad Amir Qamar, Mohammad Obaid ACS Omega [Image: see text] High-performance concrete (HPC) is increasingly used in construction due to its superior strength and durability. However, current stress block parameters used for designing normal-strength concrete cannot be safely applied to HPC. To address this issue, new stress block parameters have been proposed through experimental works, which are used for designing HPC members. In this study, the behavior of HPC was investigated using these stress block parameters. Two-span beams made of HPC were tested under five-point bending, and an idealized stress block curve was derived from the experimental stress–strain curve for grades 60, 80, and 100 MPa. Based on the stress block curve, equations for the ultimate moment of resistance, depth of the neutral axis, limiting moment of resistance, and maximum depth of the neutral axis were proposed. An idealized load–deformation curve was also developed, which identified four significant events: first cracking, yielding of reinforced steel, crushing of concrete with spalling of cover, and ultimate failure. The predicted values were found to be in good agreement with the experimental values, and the average location of the first crack was identified to be 0.270 L, measured from the central support on either side of the span. These findings provide important insights for the design of HPC structures, contributing to the development of more resilient and durable infrastructure. American Chemical Society 2023-05-09 /pmc/articles/PMC10210026/ /pubmed/37251169 http://dx.doi.org/10.1021/acsomega.3c01197 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Momin, Asif Iqbal A.
Zende, Aijaz Ahmad
Khadiranaikar, Rajesab B.
Alsabhan, Abdullah H.
Alam, Shamshad
Khan, Mohammad Amir
Qamar, Mohammad Obaid
Investigating the Flexural Behavior of a Two-Span High-Performance Concrete Beam Using Experimentally Derived Stress Block Parameters
title Investigating the Flexural Behavior of a Two-Span High-Performance Concrete Beam Using Experimentally Derived Stress Block Parameters
title_full Investigating the Flexural Behavior of a Two-Span High-Performance Concrete Beam Using Experimentally Derived Stress Block Parameters
title_fullStr Investigating the Flexural Behavior of a Two-Span High-Performance Concrete Beam Using Experimentally Derived Stress Block Parameters
title_full_unstemmed Investigating the Flexural Behavior of a Two-Span High-Performance Concrete Beam Using Experimentally Derived Stress Block Parameters
title_short Investigating the Flexural Behavior of a Two-Span High-Performance Concrete Beam Using Experimentally Derived Stress Block Parameters
title_sort investigating the flexural behavior of a two-span high-performance concrete beam using experimentally derived stress block parameters
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10210026/
https://www.ncbi.nlm.nih.gov/pubmed/37251169
http://dx.doi.org/10.1021/acsomega.3c01197
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