{"title":"考虑硬化和损伤效应的黄土蠕变本构模型研究","authors":"Nan Yang, Yahong Deng, Li Li, Huandong Mu","doi":"10.1007/s10064-025-04457-y","DOIUrl":null,"url":null,"abstract":"<div><p>Creep deformation of loess will directly affect the long-term safety and stability of loess engineering. The creep deformation characteristics of loess under different confining pressures and loading levels were investigated by performing graded loading and unloading triaxial creep tests in order to study the creep characteristics of loess in depth. Test results show that under similar loading conditions, higher confining pressure reduces creep. Only decelerated creep occurs in loess at low and medium stress. Decelerated, steady, and accelerated creep occur in loess at high stress. The creep mechanism of loess was analysed according to the mechanical response characteristics of loess to creep loading and the microstructural evolution characteristics of typical loess creep. The creep mechanism of loess is that the creep of loess is a result of the combined effect of compression hardening and structural damage. Finally, based on Norton's creep power law and continuous damage mechanics, a new loess creep constitutive model considering hardening and damage effects is proposed. The validity and reasonability of the proposed model is verified by fitting the theoretical model to the creep test data. The research results contribute to a better understanding of the creep properties of loess. They are of great practical value for solving loess rheological problems in practical engineering.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 10","pages":""},"PeriodicalIF":4.2000,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study on creep constitutive model of loess considering hardening and damage effects\",\"authors\":\"Nan Yang, Yahong Deng, Li Li, Huandong Mu\",\"doi\":\"10.1007/s10064-025-04457-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Creep deformation of loess will directly affect the long-term safety and stability of loess engineering. The creep deformation characteristics of loess under different confining pressures and loading levels were investigated by performing graded loading and unloading triaxial creep tests in order to study the creep characteristics of loess in depth. Test results show that under similar loading conditions, higher confining pressure reduces creep. Only decelerated creep occurs in loess at low and medium stress. Decelerated, steady, and accelerated creep occur in loess at high stress. The creep mechanism of loess was analysed according to the mechanical response characteristics of loess to creep loading and the microstructural evolution characteristics of typical loess creep. The creep mechanism of loess is that the creep of loess is a result of the combined effect of compression hardening and structural damage. Finally, based on Norton's creep power law and continuous damage mechanics, a new loess creep constitutive model considering hardening and damage effects is proposed. The validity and reasonability of the proposed model is verified by fitting the theoretical model to the creep test data. The research results contribute to a better understanding of the creep properties of loess. They are of great practical value for solving loess rheological problems in practical engineering.</p></div>\",\"PeriodicalId\":500,\"journal\":{\"name\":\"Bulletin of Engineering Geology and the Environment\",\"volume\":\"84 10\",\"pages\":\"\"},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2025-09-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bulletin of Engineering Geology and the Environment\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10064-025-04457-y\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-025-04457-y","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
Study on creep constitutive model of loess considering hardening and damage effects
Creep deformation of loess will directly affect the long-term safety and stability of loess engineering. The creep deformation characteristics of loess under different confining pressures and loading levels were investigated by performing graded loading and unloading triaxial creep tests in order to study the creep characteristics of loess in depth. Test results show that under similar loading conditions, higher confining pressure reduces creep. Only decelerated creep occurs in loess at low and medium stress. Decelerated, steady, and accelerated creep occur in loess at high stress. The creep mechanism of loess was analysed according to the mechanical response characteristics of loess to creep loading and the microstructural evolution characteristics of typical loess creep. The creep mechanism of loess is that the creep of loess is a result of the combined effect of compression hardening and structural damage. Finally, based on Norton's creep power law and continuous damage mechanics, a new loess creep constitutive model considering hardening and damage effects is proposed. The validity and reasonability of the proposed model is verified by fitting the theoretical model to the creep test data. The research results contribute to a better understanding of the creep properties of loess. They are of great practical value for solving loess rheological problems in practical engineering.
期刊介绍：
Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces:
• the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations;
• the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change;
• the assessment of the mechanical and hydrological behaviour of soil and rock masses;
• the prediction of changes to the above properties with time;
• the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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