title: ÐÐ»Ð¸ÑÐ½Ð¸Ðµ ÑÐµÐ¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ñ ÑÐ²Ð¾Ð¹ÑÑÐ² Ð±ÐµÑÐ¾Ð½Ð° Ð½Ð° ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ½ÑÐµ ÑÑÐ¸Ð»Ð¸Ñ Ð² Ð¾Ð±Ð¾Ð»Ð¾ÑÐºÐµ Ð¶ÐµÐ»ÐµÐ·Ð¾Ð±ÐµÑÐ¾Ð½Ð½Ð¾Ð¹ Ð´ÑÐ¼Ð¾Ð²Ð¾Ð¹ ÑÑÑÐ±Ñ Ð²ÑÑÐ¾ÑÐ¾Ð¹ 120 Ð¼
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ°
titleType: Subtitle
title: Influence of rheological properties of concrete on temperature forces in the shell of a reinforced concrete chimney which height is 120 m
Creators: name: ÐÐ¼Ð¸ÑÑÐ¸ÐµÐ²Ð°, Ð¡Ð²ÐµÑÐ»Ð°Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: Ð¶ÐµÐ»ÐµÐ·Ð¾Ð±ÐµÑÐ¾Ð½Ð½ÑÐµ Ð´ÑÐ¼Ð¾Ð²ÑÐµ ÑÑÑÐ±Ñ
Ð½ÐµÑÐ°Ð²Ð½Ð¾Ð¼ÐµÑÐ½ÑÐ¹ Ð½Ð°Ð³ÑÐµÐ²
ÑÑÐ°Ð´ÐºÐ°
Ð¿Ð¾Ð»Ð·ÑÑÐµÑÑÑ
ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ½ÑÐµ ÑÑÐ¸Ð»Ð¸Ñ
reinforced concrete chimneys
uneven heating
shrinkage
concrete creep
temperature forces

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description: The subject of the graduate qualification work is Â«Influence of rheological properties of concrete on temperature forces in the shell of a reinforced concrete chimney which height is 120 mÂ».The work is devoted to the theoretical evaluation of changes in the characteristics of the stress-strain state of the shell elements of the reinforced concrete chimney under loading and uneven heating of the various durations, taking into account the features of physically nonlinear deformation of reinforced concrete.The main objectives of the research: 1. The study of the physical basis of the effect of high temperatures on deformations, the mechanical and deformation properties of concrete and the methods for taking this effect into account in structural calculations. 2. Evaluation of changes in temperature forces in the shell elements of the reinforced concrete chimney depending on the magnitude of the temperature drop, the normal compressive force, the temperature rise rate, the duration of the load and temperature.The calculations based on the deformation model were performed using the BRUS program. The temperature deformations and the creep of concrete were determined by analytical expressions and taken into account in quantity equations.Quantitative data are obtained on the relaxation of temperature forces and the redistribution of stresses between concrete and reinforcement due to shrinkage and concrete creep. The decrease in temperature forces in horizontal sections was 30â88%, in vertical sections â 34â76%. The fullest extent the decrease is characteristic of elements with a large value of normal compressive force. The values of additional compressive stresses in the reinforcement due to shrinkage and concrete creep can reach values of the order of (0,19Ã·0,26)Â·Rs,ser in horizontal sections and (0,1Ã·0,12)Â·Rs,ser in vertical sections, what must be taken into account in calculations for crack strength.