Analysis and Design of Reinforced Concrete Thin Cylindrical Shell

The need to come up with economical and efficient structural design led the engineers and researchers to focus more on shell structures. It is more durable, economical as it requires a minimum amount of material provides larger interior space and is aesthetic. A shell dominantly behaves as a membrane, though, at the edges, bending stresses get accumulated. Albeit several theories have been put forward, Schorer’s theory is eminent in the analysis of the long span thin cylindrical shells. This study is focused on the analysis of the stresses by utilizing the Fourier series and Schorer’s theory. Further, the shell is designed for the steel reinforcement as per the Concrete Reinforcing Steel Institute (CRSI) Design Handbook after calculating the final stress resultants and the detailing is also depicted.

Creative way of the Iron and Steel Institute of NAS of Ukraine. 80 years

The history of the creation of the Iron and Steel Institute named after Z.I. Nekrasov National Academy of Sciences of Ukraine (HMI). The main stages in the history of the HMI, its leaders and directions of scientific research are presented. The foundations of scientific topics and reputable scientific schools were laid by outstanding scientists of the Institute, who have not lost their relevance at the present time. It is shown that the creation and establishment of the HMI was determined by the need to develop the country's ferrous metallurgy. The origins of creating the scientific topics of the Institute, which covered all the main stages of ferrous metallurgy, are given. Major scientific developments created by the staff of the Institute for the first time in world and domestic practice, which currently form the basis of world metallurgy, are presented. The analysis shows that the strategic direction of the development of domestic metallurgy in the future is the evolutionary change in metallurgical technologies. In this regard, the Institute develops the main directions of scientific and technical support of technologies for blast furnace, steelmaking and rolling production, heat treatment of rolled products. The examples of modern scientific developments of the Institute are given. The research areas of the Institute of Ferrous Metallurgy of the National Academy of Sciences of Ukraine cover a wide range of problems in the production of metal products and are complex, which is an important advantage in modern metallurgical production. The HMI has a serious scientific potential for the latest modern technological and technical solutions for domestic metallurgical production, which at the development stage are being adapted to the existing technological and raw material conditions in Ukraine. Most of the new developments in technological content and intellectual level of implementation are not inferior to world analogues and are widespread in world practice.

Iron and Steel Institute in the system of the National Academy of Sciences of Ukraine. Experience and prospects.

The history of the creation of the Iron and Steel Institute is given. It is shown that the creation and establishment of the Institute was determined by the need to develop the country's ferrous metallurgy. The Institute has united groups of metallurgical scientists, scattered in their activities, who worked in various institutes of the country. The program of the Institute, despite its youth, was wide and relevant, which can be explained by the experience, initiative and scale of the activities of the scientists who headed the departments of the institute. The origins of the creation of the scientific themes of the Institute, which covered all the major redistribution of the steel industry, are given. The major scientific developments created by the Institute’s staff for the first time in world and domestic practice, which currently form the basis of world metallurgy, are given. Outstanding scientists of the Institute created quite a few scientific schools, which even today continue to make an invaluable contribution to the development of scientific subjects, the implementation of the results of basic and applied research in metallurgical enterprises. The analysis shows that the strategic direction of development of the domestic metallurgy in the future is an evolutionary change in metallurgical technologies. In this regard, the main areas of scientific and technical support of blast furnace, steelmaking and rolling production, heat treatment of rolled products developed at the Institute are given. Examples of modern scientific developments of the Institute are given.

Iron and Steel Institute in the system of the National Academy of Sciences of Ukraine. Experience and prospects

The history of the creation of the Iron and Steel Institute is given. It is shown that the creation and establishment of the Institute was determined by the need to develop the country's ferrous metallurgy. The Institute has united groups of metallurgical scientists, scattered in their activities, who worked in various institutes of the country. The program of the Institute, despite its youth, was wide and relevant, which can be explained by the experience, initiative and scale of the activities of the scientists who headed the departments of the institute. The origins of the creation of the scientific themes of the Institute, which covered all the major redistribution of the steel industry, are given. The major scientific developments created by the Institute’s staff for the first time in world and domestic practice, which currently form the basis of world metallurgy, are given. Outstanding scientists of the Institute created quite a few scientific schools, which even today continue to make an invaluable contribution to the development of scientific subjects, the implementation of the results of basic and applied research in metallurgical enterprises. The analysis shows that the strategic direction of development of the domestic metallurgy in the future is an evolutionary change in metallurgical technologies. In this regard, the main areas of scientific and technical support of blast furnace, steelmaking and rolling production, heat treatment of rolled products developed at the Institute are given. Examples of modern scientific developments of the Institute are given.

Web crippling study of rivet fastened rectangular hollow flange channel beams with flanges fastened to supports

Thin-walled steel hollow flange channel beams are commonly used as joists and bearers in various flooring systems in buildings. A new rivet fastened rectangular hollow flange channel beam was proposed using an intermittently rivet fastening process as an alternative to welded beams. This flexible fastening process allows rectangular hollow flange channel beams to have greater section optimisation, by configuring web and flange widths and thicknesses. In the industrial applications of rectangular hollow flange channel beams as flooring, roofing or modular building systems, their flanges will be fastened to supports, which will provide increased capacities. However, no research has been conducted to investigate the web crippling capacities of rectangular hollow flange channel beams with flanges fastened to supports under two-flange load cases. Therefore, an experimental study was conducted to investigate the web crippling behaviour and capacities of rectangular hollow flange channel beams based on the new American Iron and Steel Institute S909 standard test method. The web crippling capacities were compared with the predictions from the design equations in Australia/New Zealand Standard 4600 and American Iron and Steel Institute S100 to determine their accuracy in predicting the web crippling capacities of rectangular hollow flange channel beams. Test results showed that these design equations are considerably conservative for the end two-flange load case while being unconservative for the interior two-flange load case. New equations are proposed to determine the web crippling capacities of rectangular hollow flange channel beams with flanges fastened to supports. Test results showed that web crippling capacities increased by 78% and 65% on average for the end two-flange and interior two-flange load cases when flanges were fastened to supports. This article presents the details of this web crippling experimental study of rectangular hollow flange channel beam sections and the results.

Diseño óptimo de estructuras tridimensionales para techos

Se presenta un laboratorio virtual que realiza el análisis, diseño y optimización de estructuras de acero rolado en frío, así como la cuantificación de los materiales utilizados en la construcción de la techumbre completa y el costo de fabricación e instalación la misma. El software está dotado con una interfaz de usuario amigable desarrollado para la empresa “Tejas El Águila”. El análisis estructural considera cargas de peso propio, muertas y vivas, a las que estará sometida la estructura en condiciones de servicio, además de considerarse los efectos de viento y sismo para la República Mexicana -de acuerdo a la normatividad vigente. El optimizador está basado en métodos de minimización de entropía con restricciones múltiples, evaluando cada una de las estructuras por el método de la rigidez. Para la evaluación de la eficiencia de la estructura, se utiliza la normativa American Iron and Steel Institute- Allowable Stress Design (AISI-ASD). La optimización de las estructuras se realiza haciendo múltiples evaluaciones de diferentes configuraciones de las mismas, tarea que se ha paralelizado utilizando técnicas de programación de memoria compartida Open Multiprocessing (OpenMP). La combinación adecuada del seguimiento de las normatividades vigentes, la implementación del optimizador y los métodos matriciales para el cálculo de estructuras, aunado al ambiente grafico fácil de usar y amigable, han resultado en un potente software que genera soluciones de vivienda económicas, seguras y estéticas (favoreciendo así a un amplio sector de la sociedad mexicana).