A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Physical and numerical modelling of soil-atmosphere-structure interaction
Extreme, extended wet and dry seasons increase the adverse effects that soil wetting and drying cycles have on the response of shallow geotechnical structures. In expansive soils, volumetric changes due to water content variations may result in the incompatibility of deformations at the soil-structure interface. This study proposes a physical approach and a numerical model to address the soil-atmosphere-structure interactions during soil saturation and desiccation. Experimental desiccation tests were performed on relatively thin, compacted kaolin clay samples that represent the soil-atmosphere boundary. A climatic chamber was used to impose atmospheric conditions of air relative humidity, temperature, wind velocity, and irradiance on the soil surface. Empirical mathematical expressions were obtained to estimate soil desiccation rates as a function of basic atmospheric parameters and soil properties. The experimental desiccation approach was complemented with a coupled thermo-hydro-mechanical (THM) numerical model for unsaturated soils. The coupled THM model calculates water and thermal fluxes, soil volumetric changes, vertical stresses, and the compatibility of soil-structure movements during swelling and shrinking. An example of the capabilities of the numerical model is presented for a full-scale geotechnical problem.
Physical and numerical modelling of soil-atmosphere-structure interaction
Extreme, extended wet and dry seasons increase the adverse effects that soil wetting and drying cycles have on the response of shallow geotechnical structures. In expansive soils, volumetric changes due to water content variations may result in the incompatibility of deformations at the soil-structure interface. This study proposes a physical approach and a numerical model to address the soil-atmosphere-structure interactions during soil saturation and desiccation. Experimental desiccation tests were performed on relatively thin, compacted kaolin clay samples that represent the soil-atmosphere boundary. A climatic chamber was used to impose atmospheric conditions of air relative humidity, temperature, wind velocity, and irradiance on the soil surface. Empirical mathematical expressions were obtained to estimate soil desiccation rates as a function of basic atmospheric parameters and soil properties. The experimental desiccation approach was complemented with a coupled thermo-hydro-mechanical (THM) numerical model for unsaturated soils. The coupled THM model calculates water and thermal fluxes, soil volumetric changes, vertical stresses, and the compatibility of soil-structure movements during swelling and shrinking. An example of the capabilities of the numerical model is presented for a full-scale geotechnical problem.
Physical and numerical modelling of soil-atmosphere-structure interaction
Granados Jaime (author) / Caicedo Bernardo (author)
2023
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Numerical Modelling of Soil-Atmosphere Interaction for Unsaturated Surfaces
| British Library Conference Proceedings | 2006
Numerical modelling of the soil surface moisture changes due to soil-atmosphere interaction
| British Library Conference Proceedings | 2008
Numerical modelling of soil-structure interaction
| British Library Conference Proceedings | 2005
Numerical modelling of soil/structure interaction
| British Library Conference Proceedings | 1995
Experimental and numerical investigation of soil-atmosphere interaction
| Online Contents | 2013