scholarly journals RELIABILITY OF THE RESULTS OF THE CALCULATIONS IN THE FUNCTION OF THE SELECTED SOIL MODEL

Author(s):  
Mato Uljarević

The reliability of geotechnical calculations is, as it is generally known, in function of the input parameters quality, both in terms of loads, as well as the physical and mechanical soil properties. In addition to above mentioned, reliability of the results of geotechnical analysis is also influenced by selection of constitutive soil model. This paper describes soil models and analyzes the suitability of the model on a real (implemented) geotechnical project.

Author(s):  
Reza Arababadi ◽  
Hariharan Naganathan ◽  
Mohsen Saffari Pour ◽  
Atefeh Dadvar ◽  
Kristen Parrish ◽  
...  

2021 ◽  
Vol 12 (2) ◽  
pp. 6-21
Author(s):  
V. M. Maliuha ◽  
V. V. Minder

At present, high-level attention is paid to the issues of the role, significance, optimal use of soils, their protection and combating degradation. By introducing the Sustainable Development Goals at the national level, Ukraine is obliged to introduce new programs and projects that, in practice, will have macroeconomic stability, ecological balance and social cohesion. During scientific research on the multifunctional role of protective forest plantations, which at one time were created on eroded territories, which include gully-ravine lands, to revive the properties of soils, work was carried out to substantiate their regenerative function. To achieve this goal, 90 soil-forest typological stations were established in erosion control plantations of various periods of plant growth and development with the selection of 270 soil samples. A study of their water-physical and agrochemical properties was carried out with the processing of the data obtained by statistical methods. Based on the analysis of scientific literary sources, the study of successful production experience and our own research on anti-erosion plantations to determine their impact on soil properties and the environment, qualitative stages of the ecological restoration of eroded soils have been developed. Changes in the age periods of growth and development of woody plants in protective forest plantations created on gully-ravine lands lead to a gradual step-by-step ecological restoration of eroded soils. Thus, a clear correlation of the age periods of growth and development of woody plants with the qualitative stages of ecological restoration of eroded soils was obtained. The selection of research objects provided for taking into account the same technology for creating anti-erosion plantings, growth and development in the same conditions, corresponding to five age periods of growth and development of woody plants. In each age period, qualitative changes occur during the growth and development of the vegetation cover, as well as quantitative changes in indicators characterizing the properties of the soil, which are presented in comparison with the control, which is the pasture. The main functions of these plantings are presented. Attention is paid to all age periods of growth and development of anti-erosion plantings in terms of forest measures for the successful cultivation of anti-erosion plantings and their effective action. The stages of ecological restoration of eroded territories are clearly consistent with the identified age periods. The prospects for understanding the process of restoring protective vegetation cover, including forest plantations, and their direct impact on the properties of eroded soils are opening up. Keywords: erosion processes, eroded soils, anti-erosion role, periods of development, qualitative stages, soil properties, hydraulic roughness.


2007 ◽  
Vol 29 (2) ◽  
pp. 117-126
Author(s):  
Nguyen Van Pho

The fuzzy analyzing process consists of different steps. In this paper, the author considers only the method for formulation of the membership function of fuzzy loads acting on the structure. Based on the membership function of fuzzy loads, the combinations of deterministic of the regression analyzing process will be determined. The membership function of fuzzy loads is selected by the triangular membership function. It is in conformity with the concept on selection of loads in the design standards. The combination of inputs for the analyzing process will be determined, based on the number of present times of the value of input parameters (including the deterministic parameters, fuzzy parameters and the random ones) in the schema of analysis. The number of present times of input parameters is either proportional to value of the corresponding membership function or to the value of the probabilistic density function. A method for determining the appropriate combination of deterministic inputs so that each input parameter will present only one time in each combination is proposed. To illustrate the proposed method, an example on the determination of input combinations of tornado's velocity in Vietnam is presented.


2021 ◽  
Vol 19 (3) ◽  
pp. 447
Author(s):  
Darko Božanić ◽  
Aleksandar Milić ◽  
Duško Tešić ◽  
Wojciech Salabun ◽  
Dragan Pamučar

The paper presents a hybrid model for decision-making support based on D numbers, the FUCOM method and fuzzified RAFSI method, used for solving the selection of the group of construction machines for enabling mobility. By applying D numbers, the input parameters for the calculation of the weight coefficients of the criteria were provided. The calculation of the weight coefficients of the criteria was performed using the FUCOM method. The best alternative was selected using the fuzzified method, which was conditioned by the specificity of the issue so that in this case, the selection of the best alternative was made using the fuzzified RAFSI method.


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