Temperature Field Analysis of Concrete Filled Steel Tube Reinforced Concrete Columns in Fire

2014 ◽  
Vol 644-650 ◽  
pp. 5019-5022
Author(s):  
Xue Feng Liu ◽  
Qing Xin Ren ◽  
Lian Guang Jia
Keyword(s):  
Temperature Field ◽  
Reinforced Concrete ◽  
Concrete Columns ◽  
Steel Tube ◽  
Parameter Analysis ◽  
Field Analysis ◽  
Cross Sectional ◽  
Reinforced Concrete Columns ◽  
Concrete Filled Steel Tube ◽  
In Fire

In this paper, temperature field analysis of concrete filled steel tube reinforced concrete columns in fire has been carried on. A finite element model for concrete filled steel tube reinforced concrete columns in fire is developed by ABAQUS. The cross-sectional temperature field distribution regularity of concrete filled steel tube reinforced concrete columns in fire has been obtained. Parameter analysis such as fire duration time and steel ratio on the column section temperature field is conducted, and this provide the reference for the further analysis of concrete filled steel tube reinforced concrete columns.

Influencing Factors Analysis on Temperature Field of Reinforced Concrete Columns under Fire

2013 ◽  
Vol 838-841 ◽  
pp. 648-652
Author(s):  
Jian Long Cao ◽  
Hai Tao Long ◽  
Wen Luo
Keyword(s):  
Temperature Field ◽  
Reinforced Concrete ◽  
Heated Surface ◽  
Internal Surface ◽  
Concrete Columns ◽  
Element Analysis ◽  
Cross Sectional ◽  
Reinforced Concrete Columns ◽  
Section Size ◽  
The Impact

Using the finite element analysis software ABAQUS, the section temperature field of reinforced concrete columns under fire was analyzed. On this basis, the influence of the section size, the number of heated surface and the time of fire on the surface temperature were analyzed. Calculations indicate that the impact of the section size on temperature field cannot be considered when one surface was heated, three or surrounded by fire-sectional dimensions the influence was time-related. When the cross-sectional size reaches a certain value, the number of exposed surface on the temperature field can be neglected. Sectional temperature increased by time and the temperature rise rate is high at start then slow down close by fire surface, however, the rate is more stable all the time at internal surface.

Preliminary Analysis of Concrete Filled Steel Tube Reinforced Concrete Columns under Axial Compression after Exposure to Fire

2014 ◽  
Vol 578-579 ◽  
pp. 772-775
Author(s):  
Wan Qing Yu ◽  
Qing Xin Ren ◽  
Lian Guang Jia
Keyword(s):  
Reinforced Concrete ◽  
Axial Compression ◽  
Theoretical Study ◽  
Concrete Columns ◽  
Steel Tube ◽  
Element Analysis ◽  
Reinforced Concrete Columns ◽  
Concrete Filled Steel Tube ◽  
Composite Columns ◽  
Fea Model

In this paper, a further research has been carried on mechanical properties of concrete filled steel tube reinforced concrete columns after exposure to fire. A finite element analysis (FEA) model for concrete filled steel tube reinforced concrete columns after exposure to fire under axial compression is developed by ABAQUS. The temperature of cross-section element after exposure to fire has been obtained. The FEA model of temperature field is then used to investigate the mechanism of such composite columns further. Influences of parameters on Load-bearing Capacity such as fire duration time and steel ratio were analyzed. The work in this paper provides a basis for further theoretical study on concrete filled steel tube reinforced concrete columns after exposure to fire.

Experimental Study on Seismic Performance of RC Composite Core Walls with Steel Tube-Reinforced Concrete Columns and Concealed Steel Trusses under Eccentric Horizontal Loading

2010 ◽  
Vol 163-167 ◽  
pp. 2267-2273 ◽  
Author(s):  
Hong Ying Dong ◽  
Wan Lin Cao ◽  
Jian Wei Zhang
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Load Capacity ◽  
Concrete Columns ◽  
Steel Tube ◽  
Reinforced Concrete Columns ◽  
Deterioration Process ◽  
Combined Action ◽  
Process Energy ◽  
Steel Trusses

Two 1/6 scale core walls, including one RC core wall with steel tube-reinforced concrete columns and concealed steel trusses and one conventional RC core wall, were tested under eccentric horizontal cyclic loading. The load-capacity, ductility, hysteresis characteristics, stiffness, stiffness deterioration process, energy dissipation and damage characteristics of the two specimens were compared and discussed in this paper. It shows that the seismic performance of the RC core walls under combined action could be improved by setting the concealed steel trusses in the walls and using the steel tube-reinforced concrete columns as the boundary elements.

scholarly journals Numerical analysis of reinforced concrete shear walls with rectangular cross section

2020 ◽  
Vol 13 (6) ◽  
Author(s):  
Maurício Castelo Branco de Noronha Campos ◽  
Paulo Marcelo Vieira Ribeiro ◽  
Romilde Almeida de Oliveira
Keyword(s):  
Reinforced Concrete ◽  
Numerical Analysis ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Concrete Columns ◽  
Second Order ◽  
Order Effects ◽  
Cross Sectional ◽  
Reinforced Concrete Columns ◽  
Mesh Model

abstract: This study addresses a numerical analysis of reinforced concrete columns in which the lengths are significantly larger than their widths with a rectangular cross section. Numerical simulations of 1,440 cases were performed, each case simulated with the single bar model, isolated bar model and mesh model, in addition, 3D model simulations were carried out. For the validation of 3D models and bar models, comparisons were made between the numerical simulation e experimental results of 24 reinforced concrete columns. Second order effects were analyzed on the vertical moment at the edge of the columns in which the lengths are significantly larger than the widths (localized second-order effects) and also the values of the horizontal moments along the cross sectional length in the mesh model. Influences of the main variables were observed influencing the behavior of the columns in which the lengths are significantly larger than their widths: the ratio between the cross sectional dimensions, the slenderness and the stresses (normal stress and bending moment around the axis of greatest inertia).

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