Improvement of Duncan-Chang Constitutive Model of Argillaceous Siltstone Soil-Rock Mixture
Different from the stiff soil-rock mixture (S-RM), the soft blocks will break during the shear failure of the soft S-RM, so the shear mechanical properties of soft S-RM are affected by the block breakage properties. In order to accurately predict the deformation of soft S-RM slope and evaluate the e...
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Editorial Office of Pearl River
2024-01-01
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| Series: | Renmin Zhujiang |
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| Online Access: | http://www.renminzhujiang.cn/thesisDetails?columnId=68439371&Fpath=home&index=0 |
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| _version_ | 1841530575530229760 |
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| author | ZHANG Han YI Chenglong LIU Zhongfan CHEN Kangpei CHEN Yanjiang |
| author_facet | ZHANG Han YI Chenglong LIU Zhongfan CHEN Kangpei CHEN Yanjiang |
| author_sort | ZHANG Han |
| collection | DOAJ |
| description | Different from the stiff soil-rock mixture (S-RM), the soft blocks will break during the shear failure of the soft S-RM, so the shear mechanical properties of soft S-RM are affected by the block breakage properties. In order to accurately predict the deformation of soft S-RM slope and evaluate the engineering stability, it is urgent to study the shear mechanical properties and constitutive models of S-RM. The shear mechanical properties and the block breakage properties of S-RM were analyzed by the large-scale triaxial test. Based on the relationship between breakage ratio <italic>B<sub>r</sub></italic> and damage ratio <italic>R<sub>f</sub></italic>, the Duncan-Zhang constitutive model suitable for S-RM was improved. The results show that after the shear failure of soft S-RM, the content of the block size group (5–60 mm) decreases, while that of the fine soil size group (<2 mm) increases. The block breakage ratio reaches 20% under high confining stress. With the increase in confining stress, the breakage ratio and shear strength of S-RM increase. With the increase in the breakage ratio <italic>B<sub>r</sub></italic>, the damage ratio <italic>R<sub>f</sub></italic> decreases linearly. Compared with the experimental data, the improved Duncan-Chang constitutive model can more reasonably characterize the stress-strain characteristics of S-RM. |
| format | Article |
| id | doaj-art-25db83d541b84a0da43232c833cd48c4 |
| institution | Kabale University |
| issn | 1001-9235 |
| language | zho |
| publishDate | 2024-01-01 |
| publisher | Editorial Office of Pearl River |
| record_format | Article |
| series | Renmin Zhujiang |
| spelling | doaj-art-25db83d541b84a0da43232c833cd48c42025-01-15T03:01:54ZzhoEditorial Office of Pearl RiverRenmin Zhujiang1001-92352024-01-011968439371Improvement of Duncan-Chang Constitutive Model of Argillaceous Siltstone Soil-Rock MixtureZHANG HanYI ChenglongLIU ZhongfanCHEN KangpeiCHEN YanjiangDifferent from the stiff soil-rock mixture (S-RM), the soft blocks will break during the shear failure of the soft S-RM, so the shear mechanical properties of soft S-RM are affected by the block breakage properties. In order to accurately predict the deformation of soft S-RM slope and evaluate the engineering stability, it is urgent to study the shear mechanical properties and constitutive models of S-RM. The shear mechanical properties and the block breakage properties of S-RM were analyzed by the large-scale triaxial test. Based on the relationship between breakage ratio <italic>B<sub>r</sub></italic> and damage ratio <italic>R<sub>f</sub></italic>, the Duncan-Zhang constitutive model suitable for S-RM was improved. The results show that after the shear failure of soft S-RM, the content of the block size group (5–60 mm) decreases, while that of the fine soil size group (<2 mm) increases. The block breakage ratio reaches 20% under high confining stress. With the increase in confining stress, the breakage ratio and shear strength of S-RM increase. With the increase in the breakage ratio <italic>B<sub>r</sub></italic>, the damage ratio <italic>R<sub>f</sub></italic> decreases linearly. Compared with the experimental data, the improved Duncan-Chang constitutive model can more reasonably characterize the stress-strain characteristics of S-RM.http://www.renminzhujiang.cn/thesisDetails?columnId=68439371&Fpath=home&index=0soil-rock mixturebreakage ratioshear mechanical propertiesDuncan-Chang constitutive model |
| spellingShingle | ZHANG Han YI Chenglong LIU Zhongfan CHEN Kangpei CHEN Yanjiang Improvement of Duncan-Chang Constitutive Model of Argillaceous Siltstone Soil-Rock Mixture Renmin Zhujiang soil-rock mixture breakage ratio shear mechanical properties Duncan-Chang constitutive model |
| title | Improvement of Duncan-Chang Constitutive Model of Argillaceous Siltstone Soil-Rock Mixture |
| title_full | Improvement of Duncan-Chang Constitutive Model of Argillaceous Siltstone Soil-Rock Mixture |
| title_fullStr | Improvement of Duncan-Chang Constitutive Model of Argillaceous Siltstone Soil-Rock Mixture |
| title_full_unstemmed | Improvement of Duncan-Chang Constitutive Model of Argillaceous Siltstone Soil-Rock Mixture |
| title_short | Improvement of Duncan-Chang Constitutive Model of Argillaceous Siltstone Soil-Rock Mixture |
| title_sort | improvement of duncan chang constitutive model of argillaceous siltstone soil rock mixture |
| topic | soil-rock mixture breakage ratio shear mechanical properties Duncan-Chang constitutive model |
| url | http://www.renminzhujiang.cn/thesisDetails?columnId=68439371&Fpath=home&index=0 |
| work_keys_str_mv | AT zhanghan improvementofduncanchangconstitutivemodelofargillaceoussiltstonesoilrockmixture AT yichenglong improvementofduncanchangconstitutivemodelofargillaceoussiltstonesoilrockmixture AT liuzhongfan improvementofduncanchangconstitutivemodelofargillaceoussiltstonesoilrockmixture AT chenkangpei improvementofduncanchangconstitutivemodelofargillaceoussiltstonesoilrockmixture AT chenyanjiang improvementofduncanchangconstitutivemodelofargillaceoussiltstonesoilrockmixture |