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The paper proposed a numerical model of a shear connection between a reinforced concrete slab and a steel shape. The connection was made using a top-hat profile. A method for conducting experimental research on shear connections in the composite structures was presented. Geometric dimensions and material parameters of the analysed model of connection, on which the experimental research was conducted, were noted. The results of the conducted experimental research were compared to the results of the numerical analysis performed using ANSYS software. displecement curves were analysed for both cases and any correlation between experimental and numerical results was noted.

means of three-dimensional CFD and heat transfer numerical simulations // Solar energy. - Nr.77 (2004), 13 p. Ciemiņš R., Nagla J., Saveļjevs P. Siltumtehnika. - Rīga: Zvaigzne, 1967. - 454 lpp. Boloņina A. Termiskā stratifikācija siltuma akumulācijas tvertnēs // magistra darbs. - Rīgas Tehniskā universitāte (2008) Rochas C. Experimental analysis of solar combisystems. Optimization // phD. - thesis. - Riga Technical university (2008)

Experimental analysis of some computation rules in a simple parallel reasoning system for the ALC description logic

A computation rule determines the order of selecting premises during an inference process. In this paper we empirically analyse three particular computation rules in a tableau-based, parallel reasoning system for the ALC description logic, which is built in the relational programming model in the Oz language. The system is constructed in the lean deduction style, namely, it has the form of a small program containing only basic mechanisms, which assure soundness and completeness of reasoning. In consequence, the system can act as a convenient test-bed for comparing various inference algorithms and their elements. We take advantage of this property and evaluate the studied methods of selecting premises with regard to their efficiency and speedup, which can be obtained by parallel processing.

. - Maintenance and Reliability, vol.16, No.1, pp.164-169. [13] Kopecki T. and Mazurek P. (2013): Problems of numerical bifurcation reproducing in postcritical deformation states of aircraft structures. - Journal of Theoretical and Applied Mechanics, vol.51, No.4, pp.969-977. [14] Kubiak T. (2013): Static and Dynamic Buckling of Thin-Walled Plate Structures. - London: Springer, Verlag. [15] Lonkwic P. and Różyło P. (2016): Theoretical and experimental analysis of loading impact from the progressive gear on the lift braking distance with the use of the free fall method

Art and Nature in Hydraulics” , Venice, Italy, 1–6 July 2007. Termini D., Sammartano V. (2008) Experimental analysis of relation between coherent turbulent structures and bed-forms formation, Archives of Hydro-Engineering and Environmental Mechanics , 55 (3–4), 125–143. Termini D., Sammartano V. (2009) Experimental observation of horizontal coherent turbulent structures in a straight flume, Proceedings of River, Coastal and Estuarine Morphodynamics – RCEM 2009 , 21–29 September, Santa Fe City, Argentina. Utami T., Ueno T. (1991) Experimental Study on the

., Calçada, R., Berto, F., Fernández-Canteli, A., 2017, Generalized probabilistic model allowing for various fatigue damage variables , International Journal of Fatigue, 100, 187-194, DOI: 10.1016/j.ijfatigue.2017.03.031 HBM nCode, 2013,Fatigue analysis of seam welded structures using nCode DesignLife, < > Kopas, P., Sága, M., 2013, In-phase multiaxial fatigue experimental analysis of welded cylindrical 6063-T66 aluminium alloy specimens , Manufacturing Technology, 13

–20 september 1991 (pp. 321–332). Brugge, Belgium. 23. Karcz, J. & Major, M. (2001). Experimental studies of heat transfer in an agitated vessel equipped with vertical tubular coil. Inż. Chem. Proc. 22, 445–459. 24. Karcz, J. & Major, M. (2001). Badania wymiany ciepła w mieszalniku z wężownicą pionową. Inż. Chem. i Proc ., 22, 3C, 639–644. 25. Kiełbus-Rąpała, A. & Karcz, J. (2012). Experimental analysis of the hydrodynamics of a three-phase system in a vessel with two impellers. Chem. Pap ., 66(6), 574–582. DOI: 10.2478/s11696-012-0157-z. 26. Kembłowski, Z. (1973


The aerodynamic research into models of an aircraft aims at creating the main characteristics of aerodynamic forces and moments and the aerodynamic characteristics of coefficients of aerodynamic forces and moments, based on real dimensions. The method of 3D printing was used to create a model of an aircraft. The model with the previously set printing parameters and commands for a 3D printer, in the right order, was imported into MakerBot Print. The final stage was printing the model. The printed components of the model of an aircraft were imperfect due to the incorrectly set printing parameters. The model with the previously set printing parameters and commands for a 3D printer, in the right order, was imported into MakerBot Print. The final stage was printing the model. The printed components of the model of an aircraft were imperfect due to the incorrectly set printing parameters. The printing parameters were corrected in the next printing sessions so the surfaces of the components were good enough and grinding was unnecessary. Some excess material was removed in each of the printed components, and the slots were cleaned. Then, the individual models were put together.

The article describes the technique of creating a model of an aircraft to map its exact geometry for experimental wind tunnel research. 3D printing enables us to experimentally investigate a created geometry, in particular to investigate further prior to releasing an aircraft to service. The 3D model employs the model created in line with the previous CFD analysis.


The application of stone column technique for improvement of soft soils has attracted a considerable attention during the last decade. However, in a very soft soil, the stone columns undergo excessive bulging, because of very low lateral confinement pressure provided by the surrounding soil. The performance of stone column can be improved by the encapsulation of stone column by geosynthetic, which acts to provide additional confinement to columns, preventing excessive bulging and column failure. In the present study, a detailed experimental study on behavior of single column is carried out by varying parameters like diameter of the stone column, length of stone column, length of geosynthetic encapsulation and stiffness of encapsulation material. In addition, finite-element analyses have been performed to access the radial deformation of stone column. The results indicate a remarkable increase in load carrying capacity due to encapsulation. The load carrying capacity of column depends very much upon the diameter of the stone column and stiffness of encapsulation material. The results show that partial encapsulation over top half of the column and fully encapsulated floating column of half the length of clay bed thickness give lower load carrying capacity than fully encapsulated end bearing column. In addition, radial deformation of stone column decreases with increasing stiffness of encapsulation material.


The paper focuses on the experimental verification of the results derived from numerical simulations, based on a model of the bogie-track system, where the vertical track irregularities are introduced in the form of a pseudorandom function. This function comes from an original method of synthesizing the vertical track irregularities, depending on the geometric quality of the track and on the velocity. To verify the method, the root mean square (RMS) of the simulated accelerations in the axles and the bogie frame against each axle is compared to the experimental accelerations within the frequency range of wavelengths of the track vertical irregularities from 3 to 120 m. The results have shown a good correlation between the simulated RMS accelerations for a low quality track and the measured RMS accelerations.