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444 results on '"Jiang, Guanghui"'

5. Interactive relationship between rural residential land structure and function: Theoretical framework and application directions

Author

TIAN Yaya, JIANG Guanghui, ZHOU Tao, WU Siduo, JIN Wenxuan

Subjects
rural residential land, land structure, function, interactive relationship, theoretical framework, Environmental sciences, GE1-350, Biology (General), QH301-705.5
Abstract

Under the background of economic and social transformation, it is of great significance to explore the interactive relationship between rural residential land structure and function and promote their adaptive development, which will reshape rural space and promote rural revitalization. On the basis of explaining the connotation of “interactive relationship between rural residential land structure and function”, this study analyzed the basic conditions and dynamic mechanism, process, and characteristics of the interaction between the two, constructed a theoretical framework, and explored the application directions of the theory. The study found that: (1) Interaction between rural residential land structure and function is a process of “factor-structure-function” adjustment caused by the internal and external environments of the rural residential land system, which is characterized by staged, self-adaptive and driven. (2) Affected by the rate of regional economic development, the transition degree of the economy, and the difference of social structures, the interactive relationship between rural residential land structure and function is not corresponding on the temporal and spatial scales, showing mismatch, competition, and synergy. (3) By carrying out rural space reconstruction, attaching importance to the projection of village function to material space, innovating mixed village planning, and improving relevant system support under the guidance of “function-led land use structure adjustment”, we can promote the coordinated adaptation of rural residential land structure and function.

Published
2024
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33. Investigation of the Time-Dependent Deformation of Recycled Aggregate Concrete in a Water Environment.

Author

Liu, Xingzong, Gong, Bin, Fu, Yufang, Jiang, Guanghui, and Wang, Jintao

Subjects
RECYCLED concrete aggregates, STRAINS & stresses (Mechanics), CREEP (Materials), ELASTIC modulus, COMPRESSIVE strength
Abstract

The water environment greatly affects the creep deformation of recycled aggregate concrete (RAC). Hence, a humidity–stress–damage coupling numerical model was used for investigating the time-dependent deformation of RAC in the water environment in this study. Firstly, uniaxial compression and water absorption tests were performed to determine the calculation parameters of the creep numerical simulation of RAC in a water environment. Experimental results indicate that the elastic modulus and compressive strength drop as the water content increases. Then, the time-dependent deformation of RAC in a water environment was studied using a numerical simulation test of compressive creep when multiple stress levels were applied, and the critical stress for accelerated creep and the long-term strength of RAC were obtained. Finally, the influence of confining pressures on the long-term deformation of RAC in a water environment was discussed. When there is no confining pressure, the long-term strength of RAC is 23.53 MPa. However, when a confining pressure of 3.921 MPa is loaded onto RAC, the long-term strength of RAC is 47.052 MPa, which increases by 100%. Increasing confining pressures has an obvious effect on ensuring the long-term stable application of RAC in a water environment. Compared with the creep test, the method adopted in this study saves time and money and provides the theoretical basis for evaluating the time-dependent deformation of RAC in a water environment. [ABSTRACT FROM AUTHOR]

Published
2024
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