Vladimir Sintsov, Vladimir Mitrofanov, Alexander Sintsov, Sergey Mitrofanov
Research of a continuous transport-mounting frame elements behavior while transporting for steel deck offshore platform
National Academy of Environmental Protection and Resort Construction
Abstract. The article deals with issues concerning the stress-strain state (SSS) of a continuous transportmounting frame (СTMF) elements while transporting separate offshore platform structures in the process of offshore field development. The field, named after Vladimir Filanovsky is the largest oil reserve field discovered in Russia during the past 10 years. In 2013 77 km of submarine pipeline external oil transportation and 61 km of submarine pipeline and 40 km interfield pipeline and 40 kilometers of the pipeline were built, which bind them to the Filanovsky field and Yuri Korchagin field. One of the waterworks is ice-resistant steel platform (LSP). The given construction represents two steel support blocks of interconnected multitiered steel deck. Topsides will be installed on support bases in 2014. Deck construction is performed on the shipyard in Astrakhan and the further transportation to maintenance site demands specific steel construction – CTMF, which will allow transportation of multilayer steel deck on the barge point arrangement. SSS research data of CTMF elements for multilayer steel deck of ice-resistance steel offshore platform (ISOP) are given in the work. CTMF represents the system of cross heavy steel trusses. Dimensional model of the «multi-layer steel deck – Continuous cutting transport – mounting frame» has been developed. One has investigated element SSS of the dimensional model under load for a period liner and install deck on CTMF, removing of CTMF with the deck on the building site prior to loading onto the barge, CTMF placing with deck attached to it on a barge and during transport on the river and the sea under recommended normalized wave loads. The results of SSS numerical studies of CTMF elements are given.
Keywords: multilayer steel deck, ice-resistant steel offshore platform (ISOP), continuous transport-mounting frame (СTMF), finite element, finite-element method, design model.
Anna Ihno
Results of field researches of a compact furnace for rolling sheet glass
Donbas National Academy of Civil Engineering and Architecture
Abstract. These studies were carried out to obtain data on the presence of injuries furnace parts during operation; changes of structural elements during operation when changing technological process, if any; define the constant, sustained temperatures in the unit the furnace and on the design of the metal binding; the study of dynamic loadings in the unit the furnace. This survey recorded temperature changes in characteristic sections of the columns. Characteristic sections of the column metal frame furnace binding were taken three sections: the head of the column over the arch of the furnace, cross over the node mates columns combined beam of the dome and the cross-section located under the reference node of the mounting bracket for supporting walls of gas-flame space of the furnace. The changes of temperature in these sections. In further calculations will be made to adjust to changing temperatures height loft. On the basis of the data of mnemonic diagrams of work of the furnace and archival data management software complex Siemens PCS 7, revealed a slight drop of temperature in the period of interleaving the filing of a torch, and a slight pressure generated coking gases. The recorded values of pressures of the flue gases are negligible, and in the computational scheme will not be counted.
Keywords: glass furnace, the bottom of the furnace, the arch of the furnace, frame, the main part.
Volodymyr Mushchanov, Denis Romensky, Igor Garanzha
Investigation of the stress-strain state of unit joining walls to the bottom vertical cylindrical tanks for different types of finite element model
Donbas National Academy of Civil Engineering and Architecture
Abstract. The article describes the investigation of the stress-strain state of unit joining walls to the bottom vertical cylindrical tank of 50 thousand m3. Research has been carried out for the tank with a wall on a rigid base. The relevant of stress-strain state of unit joining walls to the bottom vertical cylindrical tanks for different types of finite element model on a rigid base has been analyzed. Features of the unit joining walls to the bottom should include the effect of various loads: static, dynamic, cyclic, corresponding to normal operation. The load on the pressure of the liquid has taken by appropriate normal operation. The main results of numerical studies and get a picture of the stress-strain state of unit joining walls to the bottom vertical cylindrical tank of 50 thousand m3 for different types of finite element model have been presented and analyzedd.
Keywords: a tank with single wall, unit joining walls to the bottom, stress-strain state, edge effect, numerical studies.
Volodymyr Mushchanov, Andriy Annenkov, Anatoliy Orzhekhovskiy
Accounting for the probabilistic nature of geometric imperfections form spatial coatings on the stands braced-cantilever type
Donbas National Academy of Civil Engineering and Architecture
Abstract. The article describes some types of monitoring the state of the geometry of the stationary frame-cantilever roof structure over the stadium with a capacity of up to 5 000 people. The results of monitoring the geometry of structures over the stands SC «Olympic» have been given. The methods take into account possible deviations of geometric in this type design, based on the finite element method in the variational formulation. We propose a method of accounting changes of design scheme of geometrically nonlinear operating stationary frame-cantilever structure covering over the stands at different stages of their manufacture, installation and operation.
Keywords: monitoring, geometric imperfections, metal construction, stationary cover over the stadium, the finite element method.
Anatolii Perelmuter a, Vitalina Yurchenko b
On the issue of structural analysis of spatial systems from thin-walled bars with open profiles
a SCAD Soft, b Kyiv National University of Civil Engineering and Architecture
Abstract. A working hypothesis relating to the structural analysis of the spatial structures from thin-walled bars with open profiles using seven degree of freedoms has been verified. The verification has been performed based on the results of the structural analysis of thin-walled bar systems which behavior under the external loading has been simulated using design schemes from thin shell finite elements. Structural analysis has been realized using software SCAD. The results of the performed investigation have pointed that the suggestion concerning «joint warping» existence or, in other words, the equal warping for the each end member cross-section sided to the joint under consideration often is not true even for those design cases, where plane design models with spatial application of the structural loading are considered. Only the shell finite-element model of the thin-walled bar system can describe the actual interaction of the thin-walled bars at the structural joint correctly.
Keywords: thin-walled bar, warping, bimoment, numerical simulation, finite element analysis, root-mean-square error.