A Strain Rate-Dependent Damage Evolution Model for Concrete Based on Experimental Results
There are various definitions of damage variables from the existing damage models. The calculated damage value by the current methods still could not well correspond to the actual damage value. Therefore, it is necessary to establish a damage evolution model corresponding to the actual damage evolut...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6643263 |
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| author | Peng Wan Xiaoyan Lei Bin Xu Hui Song |
| author_facet | Peng Wan Xiaoyan Lei Bin Xu Hui Song |
| author_sort | Peng Wan |
| collection | DOAJ |
| description | There are various definitions of damage variables from the existing damage models. The calculated damage value by the current methods still could not well correspond to the actual damage value. Therefore, it is necessary to establish a damage evolution model corresponding to the actual damage evolution. In this paper, a strain rate-sensitive isotropic damage model for plain concrete is proposed to describe its nonlinear behavior. Cyclic uniaxial compression tests were conducted on concrete samples at three strain rates of 10−3s−1, 10−4s−1, and 10−5s−1, respectively, and ultrasonic wave measurements were made at specified strain values during the loading progress. A damage variable was defined using the secant and initial moduli, and concrete damage evolution was then studied using the experimental results of the cyclic uniaxial compression tests conducted at the different strain rates. A viscoelastic stress-strain relationship, which considered the proposed damage evolution model, was presented according to the principles of irreversible thermodynamics. The model results agreed well with the experiment and indicated that the proposed damage evolution model can accurately characterize the development of macroscopic mechanical weakening of concrete. A damage-coupled viscoelastic constitutive relationship of concrete was recommended. It was concluded that the model could not only characterize the stress-strain response of materials under one-dimensional compressive load but also truly reflect the degradation law of the macromechanical properties of materials. The proposed damage model will advance the understanding of the failure process of concrete materials. |
| format | Article |
| id | doaj-art-ddae041632b34b6ea05b42345285705b |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-ddae041632b34b6ea05b42345285705b2025-02-03T01:05:25ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/66432636643263A Strain Rate-Dependent Damage Evolution Model for Concrete Based on Experimental ResultsPeng Wan0Xiaoyan Lei1Bin Xu2Hui Song3Engineering Research Center of Railway Environmental Vibration and Noise, Ministry of Education, Nanchang 330013, ChinaEngineering Research Center of Railway Environmental Vibration and Noise, Ministry of Education, Nanchang 330013, ChinaJiangxi Provincial Key Laboratory of Hydraulic & Civil Engineering Infrastructure Security, Nanchang Institute of Technology, Nanchang 330099, ChinaJiangxi Provincial Key Laboratory of Hydraulic & Civil Engineering Infrastructure Security, Nanchang Institute of Technology, Nanchang 330099, ChinaThere are various definitions of damage variables from the existing damage models. The calculated damage value by the current methods still could not well correspond to the actual damage value. Therefore, it is necessary to establish a damage evolution model corresponding to the actual damage evolution. In this paper, a strain rate-sensitive isotropic damage model for plain concrete is proposed to describe its nonlinear behavior. Cyclic uniaxial compression tests were conducted on concrete samples at three strain rates of 10−3s−1, 10−4s−1, and 10−5s−1, respectively, and ultrasonic wave measurements were made at specified strain values during the loading progress. A damage variable was defined using the secant and initial moduli, and concrete damage evolution was then studied using the experimental results of the cyclic uniaxial compression tests conducted at the different strain rates. A viscoelastic stress-strain relationship, which considered the proposed damage evolution model, was presented according to the principles of irreversible thermodynamics. The model results agreed well with the experiment and indicated that the proposed damage evolution model can accurately characterize the development of macroscopic mechanical weakening of concrete. A damage-coupled viscoelastic constitutive relationship of concrete was recommended. It was concluded that the model could not only characterize the stress-strain response of materials under one-dimensional compressive load but also truly reflect the degradation law of the macromechanical properties of materials. The proposed damage model will advance the understanding of the failure process of concrete materials.http://dx.doi.org/10.1155/2021/6643263 |
| spellingShingle | Peng Wan Xiaoyan Lei Bin Xu Hui Song A Strain Rate-Dependent Damage Evolution Model for Concrete Based on Experimental Results Advances in Civil Engineering |
| title | A Strain Rate-Dependent Damage Evolution Model for Concrete Based on Experimental Results |
| title_full | A Strain Rate-Dependent Damage Evolution Model for Concrete Based on Experimental Results |
| title_fullStr | A Strain Rate-Dependent Damage Evolution Model for Concrete Based on Experimental Results |
| title_full_unstemmed | A Strain Rate-Dependent Damage Evolution Model for Concrete Based on Experimental Results |
| title_short | A Strain Rate-Dependent Damage Evolution Model for Concrete Based on Experimental Results |
| title_sort | strain rate dependent damage evolution model for concrete based on experimental results |
| url | http://dx.doi.org/10.1155/2021/6643263 |
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