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地聚合物混凝土与钢管界面粘结滑移性能的试验与数值研究。

Experimental and numerical investigations on the bond-slip behavior of the interface between geopolymer concrete and steel tube.

作者信息

Hai Ran, Ma Zeya, Chen Xiang, Cao Yun, Zhang Jianwei, Hui Cun

机构信息

School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471000, China.

School of Intelligent Construction and Civil Engineering, Zhongyuan University of Technology, Zhengzhou, 450007, China.

出版信息

Sci Rep. 2024 Nov 18;14(1):28480. doi: 10.1038/s41598-024-79964-1.

DOI:10.1038/s41598-024-79964-1
PMID:39557983
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11574139/
Abstract

This study conducts push-out tests on eight geopolymer concrete filled steel tube column specimens with varying design parameters to evaluate the effects of steel tube wall thickness, concrete strength, and the presence of welded longitudinal ribs on the bond-slip performance at the interface between geopolymer concrete and steel tube. The study analyzes the influence mechanism of chemical bonding force, mechanical bite force, and friction resistance on bond strength and a three-stage bond-slip constitutive relationship is established. The results indicate that steel tube strain increases with height, with significant strain observed at the welding structure and the fixed end of the steel tube. The length-to-diameter ratio, diameter-to-thickness ratio, concrete strength, and construction measures of the steel tube are identified as key factors in enhancing interfacial bonding performance. The presence of welded longitudinal ribs on the inner wall of the steel tube significantly improves the interface bonding. The calculated bond strength ratios, compared with the test results, fall within an 11% margin, demonstrating good agreement.

摘要

本研究对八个具有不同设计参数的地聚合物钢管混凝土柱试件进行推出试验，以评估钢管壁厚、混凝土强度以及焊接纵向肋的存在对地质聚合物混凝土与钢管界面粘结滑移性能的影响。该研究分析了化学粘结力、机械咬合力和摩擦力对粘结强度的影响机制，并建立了三阶段粘结滑移本构关系。结果表明，钢管应变随高度增加，在焊接结构和钢管固定端观察到明显应变。钢管的长径比、径厚比、混凝土强度和施工措施被确定为提高界面粘结性能的关键因素。钢管内壁焊接纵向肋的存在显著改善了界面粘结。计算得到的粘结强度比与试验结果相比，误差在11%以内，表明吻合良好。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/19b7806d16dc/41598_2024_79964_Fig13_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/043b556090d8/41598_2024_79964_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/cc5ac4a9c8a6/41598_2024_79964_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/717028bf749b/41598_2024_79964_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/63dbc3dc9467/41598_2024_79964_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/8fbc11b18cd8/41598_2024_79964_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/315f36fed4e6/41598_2024_79964_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/2dc25c653b5b/41598_2024_79964_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/2ef1e5906861/41598_2024_79964_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/4ed26071168f/41598_2024_79964_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/959d13e1f0a4/41598_2024_79964_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/3e9737b3f798/41598_2024_79964_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/cba4bf866078/41598_2024_79964_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5618/11574139/19b7806d16dc/41598_2024_79964_Fig13_HTML.jpg

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