Experimental and Theoretical Investigation on Cracking Behavior and Influencing Factors of Steel-Reinforced Concrete Deep Beams
Steel-reinforced concrete (SRC) deep beams have been widely used in engineering applications such as high-rise buildings and long-span bridges, with their structural behavior and mechanical properties attracting significant research attention. To investigate the shear cracking behavior of SRC deep b...
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MDPI AG
2025-05-01
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| author | Gaoxing Hu Lei Zeng Buqing Chen Shuai Teng |
| author_facet | Gaoxing Hu Lei Zeng Buqing Chen Shuai Teng |
| author_sort | Gaoxing Hu |
| collection | DOAJ |
| description | Steel-reinforced concrete (SRC) deep beams have been widely used in engineering applications such as high-rise buildings and long-span bridges, with their structural behavior and mechanical properties attracting significant research attention. To investigate the shear cracking behavior of SRC deep beams, seven specimens with a scale of 0.4 times were designed for static loading tests, and the influence of the shear-span-to-depth ratio λ, the width ratio of the steel flange, and the height ratio of the steel web on the width and spacing of the diagonal crack was considered. The cracking behavior of the diagonal cracks in the shear span area were recorded by the digital image correlation (DIC) technique. The results show the following: (1) the use of the DIC technology revealed the entire process of crack occurrence, development, and evolution and obtained the distribution characteristics of crack development; (2) the steel flange width has a slight effect on the spacing and width of the diagonal cracks. The diagonal crack width increased with the improvement of the height of the steel web, but the influence of the steel web on the spacing of diagonal cracks was not significant. When the height ratio increased from 0.3 to 0.45 and 0.6, the maximum oblique crack width increased by 13% and 14.5%. Based on the above experimental results and relevant analysis conclusions, an improved method was proposed to calculate the diagonal crack width of composite deep beams by further considering the influence of the crack angle. Finally, the experimental results verified its high accuracy in a qualitative analysis. The calculation method proposed in this article can be used to predict and estimate the width of diagonal cracks in SRC deep beams. |
| format | Article |
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| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-a93c8f0d13194d4ea2f3b2276e7ccccd2025-08-20T02:23:44ZengMDPI AGBuildings2075-53092025-05-011511181210.3390/buildings15111812Experimental and Theoretical Investigation on Cracking Behavior and Influencing Factors of Steel-Reinforced Concrete Deep BeamsGaoxing Hu0Lei Zeng1Buqing Chen2Shuai Teng3College of Civil Engineering and Architecture, Anhui Polytechnic University, Wuhu 241000, ChinaCollege of Civil Engineering and Architecture, Anhui Polytechnic University, Wuhu 241000, ChinaSchool of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, ChinaSteel-reinforced concrete (SRC) deep beams have been widely used in engineering applications such as high-rise buildings and long-span bridges, with their structural behavior and mechanical properties attracting significant research attention. To investigate the shear cracking behavior of SRC deep beams, seven specimens with a scale of 0.4 times were designed for static loading tests, and the influence of the shear-span-to-depth ratio λ, the width ratio of the steel flange, and the height ratio of the steel web on the width and spacing of the diagonal crack was considered. The cracking behavior of the diagonal cracks in the shear span area were recorded by the digital image correlation (DIC) technique. The results show the following: (1) the use of the DIC technology revealed the entire process of crack occurrence, development, and evolution and obtained the distribution characteristics of crack development; (2) the steel flange width has a slight effect on the spacing and width of the diagonal cracks. The diagonal crack width increased with the improvement of the height of the steel web, but the influence of the steel web on the spacing of diagonal cracks was not significant. When the height ratio increased from 0.3 to 0.45 and 0.6, the maximum oblique crack width increased by 13% and 14.5%. Based on the above experimental results and relevant analysis conclusions, an improved method was proposed to calculate the diagonal crack width of composite deep beams by further considering the influence of the crack angle. Finally, the experimental results verified its high accuracy in a qualitative analysis. The calculation method proposed in this article can be used to predict and estimate the width of diagonal cracks in SRC deep beams.https://www.mdpi.com/2075-5309/15/11/1812steel-reinforced concretedeep beamsdigital image correlationcracking behaviordiagonal crack width |
| spellingShingle | Gaoxing Hu Lei Zeng Buqing Chen Shuai Teng Experimental and Theoretical Investigation on Cracking Behavior and Influencing Factors of Steel-Reinforced Concrete Deep Beams Buildings steel-reinforced concrete deep beams digital image correlation cracking behavior diagonal crack width |
| title | Experimental and Theoretical Investigation on Cracking Behavior and Influencing Factors of Steel-Reinforced Concrete Deep Beams |
| title_full | Experimental and Theoretical Investigation on Cracking Behavior and Influencing Factors of Steel-Reinforced Concrete Deep Beams |
| title_fullStr | Experimental and Theoretical Investigation on Cracking Behavior and Influencing Factors of Steel-Reinforced Concrete Deep Beams |
| title_full_unstemmed | Experimental and Theoretical Investigation on Cracking Behavior and Influencing Factors of Steel-Reinforced Concrete Deep Beams |
| title_short | Experimental and Theoretical Investigation on Cracking Behavior and Influencing Factors of Steel-Reinforced Concrete Deep Beams |
| title_sort | experimental and theoretical investigation on cracking behavior and influencing factors of steel reinforced concrete deep beams |
| topic | steel-reinforced concrete deep beams digital image correlation cracking behavior diagonal crack width |
| url | https://www.mdpi.com/2075-5309/15/11/1812 |
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