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The impacts of contact explosions on ultra-high performance reinforced concrete slabs: experimental study and dimensional analysis.

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Title: The impacts of contact explosions on ultra-high performance reinforced concrete slabs: experimental study and dimensional analysis.
Authors: Zhang, Wei1,2 (AUTHOR), Mao, Jize1 (AUTHOR), Zhou, Bukui2 (AUTHOR) zbk751225@sina.com, Yu, Xiao2 (AUTHOR) yuxiao10@foxmail.com, Hu, Feng2 (AUTHOR), Wang, Limei2 (AUTHOR), Luo, Dan2 (AUTHOR), Mu, Chaomin3 (AUTHOR)
Source: Scientific Reports. 10/28/2024, Vol. 14 Issue 1, p1-22. 22p.
Subject Terms: *DIMENSIONAL analysis, *FAILURE mode & effects analysis, *BLAST effect, *STRUCTURAL design, *REINFORCED concrete
Abstract: Ultra-high performance concrete (UHPC) is becoming a prevailing construction material in protective engineering. However, an insufficient research basis causes difficulty in the anti-explosion structural design of UHPC. To investigate the blast resistance of the UHPC slab (UHPCS), contact explosion tests were carried out. UHPCS exhibited superior blast resistance and a lower threshold range of failure modes than the normal reinforced concrete slab (NRCS). Compared with the NRCS, the UHPCS reached a lower damage level under the same scaled distance and had smaller craters and spalls, fewer cracks, and an absence of cross-shaped cracks. For NRCS, failure modes of medium spall, severe spall, and perforation were reached under charges of 1.0, 1.6, and 2.2 kg. In contrast, UHPCS reached medium spall, severe spall, and perforation under charges of 1.6, 3.3, and 5.0 kg. The scaled slab thicknesses (T/W1/3) of the medium spall, severe spall, and perforation of the NRCSs were 1.17, 1.27, and 1.32 times larger than those of the UHPCSs, respectively. The formulae for predicting the spall and perforation thresholds of the UHPCSs were proposed. The reduction factors were used to evaluate the mitigation effect of the blast damage on the UHPC compared to that on the NRC. The reduction factors of the crater diameter () and the spall diameter () were determined to be 0.507 and 0.721, respectively. For quantitative analysis of the anti-explosion performance of UHPC, a simple estimation method for predicting the dimensions of the crater and spall of the UHPCS was proposed and verified based on the dimensional analysis method. [ABSTRACT FROM AUTHOR]
Copyright of Scientific Reports is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: The impacts of contact explosions on ultra-high performance reinforced concrete slabs: experimental study and dimensional analysis.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Wei%22">Zhang, Wei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mao%2C+Jize%22">Mao, Jize</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Bukui%22">Zhou, Bukui</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> zbk751225@sina.com</i><br /><searchLink fieldCode="AR" term="%22Yu%2C+Xiao%22">Yu, Xiao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> yuxiao10@foxmail.com</i><br /><searchLink fieldCode="AR" term="%22Hu%2C+Feng%22">Hu, Feng</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Limei%22">Wang, Limei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Luo%2C+Dan%22">Luo, Dan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mu%2C+Chaomin%22">Mu, Chaomin</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Scientific+Reports%22">Scientific Reports</searchLink>. 10/28/2024, Vol. 14 Issue 1, p1-22. 22p.
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  Data: *<searchLink fieldCode="DE" term="%22DIMENSIONAL+analysis%22">DIMENSIONAL analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22FAILURE+mode+%26+effects+analysis%22">FAILURE mode & effects analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22BLAST+effect%22">BLAST effect</searchLink><br />*<searchLink fieldCode="DE" term="%22STRUCTURAL+design%22">STRUCTURAL design</searchLink><br />*<searchLink fieldCode="DE" term="%22REINFORCED+concrete%22">REINFORCED concrete</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Ultra-high performance concrete (UHPC) is becoming a prevailing construction material in protective engineering. However, an insufficient research basis causes difficulty in the anti-explosion structural design of UHPC. To investigate the blast resistance of the UHPC slab (UHPCS), contact explosion tests were carried out. UHPCS exhibited superior blast resistance and a lower threshold range of failure modes than the normal reinforced concrete slab (NRCS). Compared with the NRCS, the UHPCS reached a lower damage level under the same scaled distance and had smaller craters and spalls, fewer cracks, and an absence of cross-shaped cracks. For NRCS, failure modes of medium spall, severe spall, and perforation were reached under charges of 1.0, 1.6, and 2.2 kg. In contrast, UHPCS reached medium spall, severe spall, and perforation under charges of 1.6, 3.3, and 5.0 kg. The scaled slab thicknesses (T/W1/3) of the medium spall, severe spall, and perforation of the NRCSs were 1.17, 1.27, and 1.32 times larger than those of the UHPCSs, respectively. The formulae for predicting the spall and perforation thresholds of the UHPCSs were proposed. The reduction factors were used to evaluate the mitigation effect of the blast damage on the UHPC compared to that on the NRC. The reduction factors of the crater diameter () and the spall diameter () were determined to be 0.507 and 0.721, respectively. For quantitative analysis of the anti-explosion performance of UHPC, a simple estimation method for predicting the dimensions of the crater and spall of the UHPCS was proposed and verified based on the dimensional analysis method. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Scientific Reports is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1038/s41598-024-74774-x
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        Text: English
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      – SubjectFull: BLAST effect
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              Text: 10/28/2024
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