Performance of Steel-Reinforced Concrete-Filled Stainless Steel Tubular Columns at Elevated Temperature

2018 ◽  
Vol 19 (01) ◽  
pp. 1940002 ◽  
Author(s):  
Qinghua Tan ◽  
Leroy Gardner ◽  
Linhai Han
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Fire Resistance ◽  
Structural Engineering ◽  
Failure Modes ◽  
Elevated Temperatures ◽  
Offshore Structures ◽  
Axial Deformation ◽  
Steel Reinforced Concrete ◽  
Tubular Columns

Steel-reinforced concrete-filled stainless steel tubular (SRCFSST) columns combine the advantages of concrete-filled stainless steel tubular (CFSST) columns and steel-reinforced concrete (SRC) columns, resulting in excellent corrosion resistance, good economy, good ductility, and excellent fire resistance. Thus, SRCFSST columns have many potential structural engineering applications, especially in offshore structures. The performance of SRCFSST columns at elevated temperatures is investigated by finite element (FE) analysis in this paper. Firstly, FE models capable of capturing the full load-deformation response of structural members at elevated temperatures are developed and validated against relevant published tests on CFSST and SRC columns under fire conditions. Based on the validated FE models, the behavioral mechanisms of the SRCFSST columns under fire are explained by analysis of the sectional temperature distribution, typical failure modes, axial deformation versus time response, and load redistribution. Finally, the fire resistance of SRCFSST columns is evaluated in comparison to CFSST columns with equivalent sectional load-bearing capacity at ambient temperature or equivalent steel ratios. The results lay the foundation for the development of fire resistance design rules for SRCFSST columns.

scholarly journals Analysis of concrete-filled stainless steel tubular columns under combined fire and loading

2018 ◽  
Author(s):  
Qinghua Tan ◽  
Leroy Gardner ◽  
Linhai Han ◽  
Dianyi Song
Keyword(s):  
Stainless Steel ◽  
Fire History ◽  
Failure Modes ◽  
Structural Response ◽  
Fe Model ◽  
Axial Deformation ◽  
Tubular Columns ◽  
Deformation Curves ◽  
Heating And Cooling ◽  
Fire Scenarios

In fire scenarios, concrete-filled stainless steel tubular (CFSST) columns undergo initial loading at ambient temperature, loading during the heating phase as the fire develops, loading during the cooling phase as the fire dies out and continual loading after the fire. CFSST columns may fail some points during this process under combined fire and loading. In this paper, the failure modes and corresponding working mechanism of CFSST columns subjected to an entire loading and fire history are investigated. Sequentially coupled thermal-stress analyses in ABAQUS are employed to establish the temperature field and structural response of the CFSST column. To improve the precision of the finite element (FE) model, the influence of moisture on the thermal conductivity and specific heat of concrete during both the heating and cooling phases is considered using subroutines. Existing fire and post-fire test data of CFSST columns are used to validate the FE models. Comparisons between predicted and test results confirm that the accuracy of the FE models is acceptable; the FE models are then extended to simulate a typical CFSST column subjected to the entire loading and fire history. The behaviour of the CFSST column is explained by analysis of the temperature distribution, load versus axial deformation curves and failure response.

Predicting fire resistance of SRC columns through gene expression programming

2020 ◽  
Vol 12 (2) ◽  
pp. 125-140
Author(s):  
Meisam Hassani ◽  
Mohammad Safi ◽  
Reza Rasti Ardakani ◽  
Amir Saedi Daryan
Keyword(s):  
Gene Expression ◽  
Experimental Data ◽  
Reinforced Concrete ◽  
Fire Resistance ◽  
Elevated Temperatures ◽  
Gene Expression Programming ◽  
Effective Parameters ◽  
Content Type ◽  
Geometrical Properties ◽  
Steel Reinforced Concrete

Purpose This paper aims to predict the fire resistance of steel-reinforced concrete columns by application of the genetic algorithm. Design/methodology/approach In total, 11 effective parameters are considered including mechanical and geometrical properties of columns and loading values as input parameters and the duration of concrete resistance at elevated temperatures as the output parameter. Then, experimental data of several studies – with extensive ranges – are collected and divided into two categories. Findings Using the first set of the data along with the gene expression programming (GEP), the fire resistance predictive model of steel-reinforced concrete (SRC) composite columns is presented. By application of the second category, evaluation and validation of the proposed model are investigated as well, and the correspondent time-temperature diagrams are derived. Originality/value The relative error of 10% and the R coefficient of 0.9 for the predicted model are among the highlighted results of this validation. Based on the statistical errors, a fair agreement exists between the experimental data and predicted values, indicating the appropriate performance of the proposed GEP model for fire resistance prediction of SRC columns.

scholarly journals Evaluation of the fire resistance of steel-reinforced concretefilled steel tubular columns with a circular cross-section

2022 ◽  
Vol 2153 (1) ◽  
pp. 012005
Author(s):  
J P Rojas Suárez ◽  
J A Pabón León ◽  
M S Orjuela Abril
Keyword(s):  
Numerical Simulation ◽  
Reinforced Concrete ◽  
Cross Sections ◽  
Fire Resistance ◽  
Circular Cross Section ◽  
Experimental Tests ◽  
Steel Reinforced Concrete ◽  
Tubular Columns ◽  
Temperature Levels ◽  
Physical Phenomena

Abstract In the present investigation, an analysis of the fire resistance of the steel-reinforced concrete-filled steel tubular columns with circular cross-sections was carried out by means of numerical simulation. The development of the study was carried out by means of numerical simulation to predict the behavior of the column against fire. The results of the numerical model are validated by comparing the temperature levels obtained through experimental tests. From the results obtained, it is shown that the increase in the contact area between the steel and the concrete reduces the average temperature of the column, which implies a greater resistance to fire. The fire resistance of the columns with the steel profile designs are between 3.4 - 3.6 times higher compared to the column only made of concrete, which is an indication of the excellent performance of the steel-reinforced concrete-filled steel tubular columns with circular cross- sections columns. In general, the methodology proposed in this research allows the analysis of the thermal physical phenomena of the different columns used for the construction of buildings.

scholarly journals Behavior of stainless steel–reinforced concrete piers under lateral impact loading

2017 ◽  
Vol 9 (5) ◽  
pp. 168781401770993 ◽  
Author(s):  
Guoxue Zhang ◽  
Shixiang Xu ◽  
Hongbing Xie ◽  
Xiwu Zhou ◽  
Yingfeng Wang
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Impact Loading ◽  
Lateral Impact ◽  
Steel Reinforced Concrete

Flexural response of stainless steel reinforced concrete beam

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 589-603
Author(s):  
Khondaker Sakil Ahmed ◽  
Md Ahsan Habib ◽  
Md Farhan Asef
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Steel Reinforced Concrete ◽  
Flexural Response

scholarly journals Behaviour of Steel Reinforced Concrete Section with CFRP Wrapping Under Axial Compression

2019 ◽  
Vol 9 (1) ◽  
pp. 1955-1958 ◽  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Columns ◽  
Radial Compression ◽  
Axial Loads ◽  
Structural Element ◽  
Reinforced Concrete Column ◽  
Element Analysis ◽  
Steel Reinforced Concrete ◽  
Tubular Columns ◽  
Cfrp Wrapping

The composite structural element under study is a carbon fiber wrapped, steel I section reinforced concrete column. The wrapped CFRP is under tension and reinforced concrete under radial compression. The aim of the research is to determine the behavior of the composite structural element under axial loads. The Stress-strain characteristics and load bearing capacity of control and CFRP wrapped tubular columns were determined experimentally. Further, Finite element analysis of steel, reinforced concrete and CFRP wrapped concrete columns sections, was conducted using ANSYS Workbench 15.0 software. The experimental and analytical results were compared.

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