The aim of the research is to determine the capillary conductivity coefficient as a characteristic material moisture parameter of the building materials using a non-destructive method while using microwave radiation. ...The aim of the research is to determine the capillary conductivity coefficient as a characteristic material moisture parameter of the building materials using a non-destructive method while using microwave radiation. Available documents are usually focused on the description of diffusion and similar works are based on the difference of partial pressure [I]. Publication will introduce experimental measurements the transport of humidity in porous material in a non-stationary state. As a result may be obtaining of data for formulation of humidity profiles with the help of experimentally built measuring apparatus without influence of human factor. Aim is verification of mentioned method of measurement for description of moisture parameters building materials applicable for practice. Complication in the determination of moisture parameters is various porous textures and the remains effect of condensation and transport influence of liquid moisture by diffusion in porous material. At the present time does not exist for standard use computational theory to description of transport of dampness in building materials. Moisture in porous medium is transported by the help of the capillary forces. The liquid moisture gradient is an indicator of moving of liquid moisture in a porous material through capillaries. This phenomenon is called capillary conductivity of moisture. Purpose presents measurement of material specimen for formulation of capillary conductivity coefficient and its dependence on moisture. The specimen of porous material is subjected to an isothermal moisture intake process. The transient moisture distribution in the specimen during the process is determined, at different stages of the process. Methodology of data scanning with the help of microwave radiation and data processing is processed for numerical computation on the basis known physics laws. The outputs of measurements can be used for evaluation of physical properties of building materials.展开更多
A reliability based analysis method for a drilled shaft stabilized slope system is presented in this paper. The drilled shaft stabilization mechanisms for the slope were treated as the drilled shaft induced soil archi...A reliability based analysis method for a drilled shaft stabilized slope system is presented in this paper. The drilled shaft stabilization mechanisms for the slope were treated as the drilled shaft induced soil arching, which was quantified by the load transfer factor in the limited equilibrium analysis. However, due to the inherent uncertainties of the soil properties and the model error of the semi-empirical load transfer equation, an extension modification of the deterministic method into a probabilistic method is developed in this paper. The MCS （Monte Carlo simulation） with log-normal random variables has been employed to calculate the probability of failure （Pf） for the drilled shafts/slope system. The developed theories were coded into a computer program for analyzing complex slope geometry and slope profile conditions. Finally, a case study has been performed to illustrate the application analysis of the developed probability approach in drilled shafts/slope system.展开更多
文摘The aim of the research is to determine the capillary conductivity coefficient as a characteristic material moisture parameter of the building materials using a non-destructive method while using microwave radiation. Available documents are usually focused on the description of diffusion and similar works are based on the difference of partial pressure [I]. Publication will introduce experimental measurements the transport of humidity in porous material in a non-stationary state. As a result may be obtaining of data for formulation of humidity profiles with the help of experimentally built measuring apparatus without influence of human factor. Aim is verification of mentioned method of measurement for description of moisture parameters building materials applicable for practice. Complication in the determination of moisture parameters is various porous textures and the remains effect of condensation and transport influence of liquid moisture by diffusion in porous material. At the present time does not exist for standard use computational theory to description of transport of dampness in building materials. Moisture in porous medium is transported by the help of the capillary forces. The liquid moisture gradient is an indicator of moving of liquid moisture in a porous material through capillaries. This phenomenon is called capillary conductivity of moisture. Purpose presents measurement of material specimen for formulation of capillary conductivity coefficient and its dependence on moisture. The specimen of porous material is subjected to an isothermal moisture intake process. The transient moisture distribution in the specimen during the process is determined, at different stages of the process. Methodology of data scanning with the help of microwave radiation and data processing is processed for numerical computation on the basis known physics laws. The outputs of measurements can be used for evaluation of physical properties of building materials.
文摘A reliability based analysis method for a drilled shaft stabilized slope system is presented in this paper. The drilled shaft stabilization mechanisms for the slope were treated as the drilled shaft induced soil arching, which was quantified by the load transfer factor in the limited equilibrium analysis. However, due to the inherent uncertainties of the soil properties and the model error of the semi-empirical load transfer equation, an extension modification of the deterministic method into a probabilistic method is developed in this paper. The MCS （Monte Carlo simulation） with log-normal random variables has been employed to calculate the probability of failure （Pf） for the drilled shafts/slope system. The developed theories were coded into a computer program for analyzing complex slope geometry and slope profile conditions. Finally, a case study has been performed to illustrate the application analysis of the developed probability approach in drilled shafts/slope system.
