Improving strength and deformation characteristics of concrete-filled steel tubular elements in bending
Journal Title: International Science Journal of Engineering & Agriculture - Year 2022, Vol 1, Issue 5
Abstract
The article is devoted to the investigation of the type of monolithic reinforced concrete structures, known as Concrete-Filled Steel Tubular (CFST) elements. They are mostly used in compression and rarely in bending, due to their high deformability. However, there is still a trend in the development of CFST structures with both compressed and bent elements. While bending the reactive lateral pressure transmits from the steel tube to the concrete core creating a favorable condition - volumetric stresses in the concrete, which increases the flexural strength of the material significantly. Experimental studies have been carried out to determine the bearing capacity and deformability of steel-reinforced concrete (composite) structures filled with fiber-reinforced concrete (FRC) of different compositions. The optimal composition of the concrete core for CFST elements in bending was selected, it helped to increase the strength and deformation characteristics of the element. To choose this optimal composition of the concrete core among others, a series of specimens were prepared and tested in compression, tensile and bending tests, and together with that, the modulus of elasticity and adhesion between the concrete core and the metal casing were studied. As the optimal solution for the concrete core – a mixture of concrete modifier (CM) and metal fibers were selected, due to an increase in the adhesion between the concrete core and the metal casing. As a result, of experimental studies, graphs of load-deflection dependencies were built and presented. The research results proved that with an increase in the physical and mechanical properties of concrete together with the degree of its adhesion to steel, transverse deformations decrease. For further research development, numerical modeling might be created to describe and foresee the behavior of such elements with different parameters in more detail, which will lead to a better understanding of the combined operation of the tube and core.
Authors and Affiliations
Mikhail Izbash, Firaz Kazimagomedov, Yuriy Izbash
Keywords
Related Articles
- EP ID EP711751
- DOI 10.46299/j.isjea.20220105.07
- Views 67
- Downloads 0
The interplay of light and color in the molding of the architectural center
The purpose of the article is the analysis of problems related to the creation of a global canvas of the city. Harmonious interaction of objects of space, landscape, man and light. The structure of the combination of key...
Spatial-like continuum and gravitational waves. Part 1. To the nature of the formation of gravitational waves
The gravitational field is studied in the process of its dispersion on discretely organized material objects of the universe (clusters of galaxies, star systems, groups of stars) and the formation of inhomogeneous gravit...
ДОСТУПНІСТЬ ТА АДАПТАЦІЯ ЕЛЕМЕНТІВ БЛАГОУСТРОЮ МІСЬКИХ ТЕРИТОРІЙ
Визначається поняття та умови комфортного та доступного середовища. Аналізується сучасний стан благоустрою міських територій в Україні. Досліджується проблема організації доступності міських територій для маломобільних г...
ЕНЕРГЕТИЧНІ ХАРАКТЕРИСТИКИ ТА ЕНЕРГОСБЕРЕГАЮЧІ ОПЦІІ В СИСТЕМАХ ВИРОБНИЦТВА ЦУКРУ
Розраховані основні енергетичні показники типової схеми виробництва цукру продуктивністю 3000 т цукру на добу, аналіз яких показав, що найбільшими є втрати з парою, яка направляється в конденсатори з вакуум-апаратів та о...
КЕРАМІЧНІ ТЕРМОСТІЙКІ ПОКРИТТЯ НА ОСНОВІ ТИТАНАТУ АЛЮМІНІЮ ДЛЯ АЕРОКОСМІЧНОЇ ТЕХНІКИ
Розроблено захисні покриття на основі титанату алюмінію Al2TiO5, сформовані детонаційно-газовим методом з використанням механічно сплавленого порошку Ti-50Al і ефекту окислювального впливу робочого газового середовища на...