Mechanical properties and damage model of coral seawater sea sand concrete under compression-shear composite action
The present study investigates the mechanical properties of coral seawater sea sand concrete (CSSC) under compression-shear composite action. A total of 54 concrete specimens were designed for the shear test with varying parameters such as normal stress ratio, curing age and different aggregate type...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952300863X |
| _version_ | 1797454581237547008 |
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| author | Jintuan Zhang Fenglun Jia Yuliang Chen Peihuan Ye |
| author_facet | Jintuan Zhang Fenglun Jia Yuliang Chen Peihuan Ye |
| author_sort | Jintuan Zhang |
| collection | DOAJ |
| description | The present study investigates the mechanical properties of coral seawater sea sand concrete (CSSC) under compression-shear composite action. A total of 54 concrete specimens were designed for the shear test with varying parameters such as normal stress ratio, curing age and different aggregate types considered. The CSSC shear stress-displacement curve was obtained by observing the damage morphology of the specimen under a combination of compressive and shear stresses. The effects of different normal stress ratios on the shear strength, peak shear displacement, and damage evolution pattern of the CSSC specimen are analyzed. The results show that the width of the main cracks on the surface of the specimen gradually increases with the normal stress ratio, and the tiny oblique cracks gradually become denser. The peak shear displacement and shear strength also increase with normal stress, and the damage evolution of the concrete gradually slows down. When the curing age was increased from 7d to 14d and 28d, the shear strength of the CSSC specimens increased by 5.9% and 11.3%, respectively. In this paper, we propose two failure models that better reflect the shear strength of CSSC under the combined action of compression and shear. Finally, a compressive-shear damage constitutive model for CSSC at different normal stress ratios has been developed and the results are in good agreement with the experimental results. |
| first_indexed | 2024-03-09T15:39:13Z |
| format | Article |
| id | doaj.art-ad8fb4f20a3d4652b007f4bf5c6a2702 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-09T15:39:13Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-ad8fb4f20a3d4652b007f4bf5c6a27022023-11-25T04:49:45ZengElsevierCase Studies in Construction Materials2214-50952023-12-0119e02682Mechanical properties and damage model of coral seawater sea sand concrete under compression-shear composite actionJintuan Zhang0Fenglun Jia1Yuliang Chen2Peihuan Ye3School of Civil Engineering and Architecture,Guangxi University of Science and Technology, Liuzhou 545006, China; School of Architectural Engineering, Hezhou University, Hezhou 542899, ChinaSchool of Civil Engineering and Architecture,Guangxi University of Science and Technology, Liuzhou 545006, ChinaSchool of Civil Engineering and Architecture,Guangxi University of Science and Technology, Liuzhou 545006, China; Guangxi Engineering Research Center for Safety Prevention and Control of Assembly Structure, Guangxi University of Science and Technology, Liuzhou 545006, China; Corresponding author at: School of Civil Engineering and Architecture,Guangxi University of Science and Technology, Liuzhou 545006, China.School of Civil Engineering and Architecture,Guangxi University of Science and Technology, Liuzhou 545006, ChinaThe present study investigates the mechanical properties of coral seawater sea sand concrete (CSSC) under compression-shear composite action. A total of 54 concrete specimens were designed for the shear test with varying parameters such as normal stress ratio, curing age and different aggregate types considered. The CSSC shear stress-displacement curve was obtained by observing the damage morphology of the specimen under a combination of compressive and shear stresses. The effects of different normal stress ratios on the shear strength, peak shear displacement, and damage evolution pattern of the CSSC specimen are analyzed. The results show that the width of the main cracks on the surface of the specimen gradually increases with the normal stress ratio, and the tiny oblique cracks gradually become denser. The peak shear displacement and shear strength also increase with normal stress, and the damage evolution of the concrete gradually slows down. When the curing age was increased from 7d to 14d and 28d, the shear strength of the CSSC specimens increased by 5.9% and 11.3%, respectively. In this paper, we propose two failure models that better reflect the shear strength of CSSC under the combined action of compression and shear. Finally, a compressive-shear damage constitutive model for CSSC at different normal stress ratios has been developed and the results are in good agreement with the experimental results.http://www.sciencedirect.com/science/article/pii/S221450952300863XCoral seawater sea sand concretePressure-shear compositeShear strengthDamage criterionDamage evolution |
| spellingShingle | Jintuan Zhang Fenglun Jia Yuliang Chen Peihuan Ye Mechanical properties and damage model of coral seawater sea sand concrete under compression-shear composite action Case Studies in Construction Materials Coral seawater sea sand concrete Pressure-shear composite Shear strength Damage criterion Damage evolution |
| title | Mechanical properties and damage model of coral seawater sea sand concrete under compression-shear composite action |
| title_full | Mechanical properties and damage model of coral seawater sea sand concrete under compression-shear composite action |
| title_fullStr | Mechanical properties and damage model of coral seawater sea sand concrete under compression-shear composite action |
| title_full_unstemmed | Mechanical properties and damage model of coral seawater sea sand concrete under compression-shear composite action |
| title_short | Mechanical properties and damage model of coral seawater sea sand concrete under compression-shear composite action |
| title_sort | mechanical properties and damage model of coral seawater sea sand concrete under compression shear composite action |
| topic | Coral seawater sea sand concrete Pressure-shear composite Shear strength Damage criterion Damage evolution |
| url | http://www.sciencedirect.com/science/article/pii/S221450952300863X |
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