Stability of rectangular concrete-filled steel tubes

Abstract

Abstract. The paper deals with the theoretical analysis of the influence of imperfections on the stability and carrying capacity of axially compressed cold-formed rectangular steel tubes filled with concrete, which use as bearing structures in the structural engineering, bridges, underground subway systems and tunnels. The behavior of the mentioned above composite structures under load were presented by numerical modelling in software ABAQUS. The support conditions of loaded edges of the steel section were considered as clamped in the models. The results of the analysis were shown the influence of imperfections on the stability and carrying capacity of the composite columns.

Numerical analysis of axial compressed multifaceted concrete-filled tube elements

“…Today, aesthetics and land use are critical for tower structures located in urban areas, such as low-voltage distribution lines. (OHPL up to 110 kV), mobile and radio communication poles, lighting poles, contact racks of the urban electric transport network [1][2][3][4][5][6][7][8][9][10]. The requirements are constantly increasing for these standards for the construction of buildings.…”

“…-numerical analysis of the stress-strain state of thin shells [9][10][11][12][13][14] and the stress-strain state of concrete under compression [15][16][17][18][19][20] (using modern finite element programs and computer systems); -numerical studies aimed at studying the features of steel and concrete joining operations as part of steel-reinforced concrete structures (including multifaceted ones) in order to develop analytical methods for calculating the compressive bearing capacity [2,7,8,[21][22][23][24][25][26][27][28][29][30]; -experimental researches (field and laboratory), in which the destruction properties, bearing capacity and characteristics of the stress-strain state of tube-concrete structures under the action of various forces were determined by load test methods [15-21, 25, 29-35].…”