Stability design of elastic reinforced-concrete poles by bending method
V. V. Gichko
State enterprise «The state research institute of building constructions»
Annotation: There are purposes, tasks of theoretical and experimental research and ways for their solution by calculation of flexible eccentrically compressed reinforced concrete elements stability using the deformation method. There are main provisions of developed calculation methods which are based on the use of real reinforcement and concrete deformation diagrams: methods which consider the peculiarities of elements work used for reinforcement concrete elements of different flexibility and used materials including those ones made with the use of high-strength concrete. The developed «exact» method which makes it possible to determine the stress-strain state of normal bar sections by deformation method with further determination of the element state is described. The actual deflection appeared in the process of loading is considered during the calculation. The developed simplified method of flexible eccentrically compressed reinforced concrete elements is given in the report. The given calculation method is based on the assessment of the most stressed section strength and on the use of real sections stiffness (B = M /ℵ) calculated by determination of their stress-strain state using the deformation method. Thus, high accuracy of obtained results is achieved. The quantitative and qualitative assessment based on the compared data of experimental research of flexible eccentrically compressed reinforced concrete poles under the short-term load which is performed by the author of the report and other two researchers (A. N. Bambura and R. H. Kayumov) with the results of their calculation according to the developed methods is given. The analysis of obtained static distribution parameters shows that the proposed calculation methods give the stable results in assessment of critical load. Thus, at calculation by «exact» method the variation coefficient is VС = 8,5 % and at calculation by simplified method it is VС = 15,5 %. Based on the results of performed researches there are basic conclusions including the possibility to use the given methods in practice of reinforced structure design in future.
Keywords: stability, load-bearing capacity, deformation method, «exact» method, simplified calculation method, accuracy assessment.
Pages: 103-112.
Link for citation: Gichko, V. V. Stability design of elastic reinforced-concrete poles by bending method. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2014. – Vol. 10, N 2. – Р. 103-112. – URL: https://donnasa.ru/publish_house/journals/spgs/2014-2/02_gichko.pdf (date of access: 16.09.2024). (in Russian)
Vol. 10, N 2 (2014)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture