Finite-Element Analysis of Isolated and Integrated Structural Steel Members Exposed to Fire

2020 ◽  
Vol 44 (S1) ◽  
pp. 35-49
Author(s):  
M. N. Amin ◽  
M. U. K. Niazi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Steel ◽  
Element Analysis ◽  
Steel Members

Effectiveness of damaged fireproofing in structural steel members subjected to fire

2019 ◽  
Vol 10 (1) ◽  
pp. 24-47 ◽  
Author(s):  
Ataollah Taghipour Anvari ◽  
Mustafa Mahamid ◽  
Michael McNallan ◽  
Mohammadreza Eslami
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Steel ◽  
Fire Resistance ◽  
Fire Protection ◽  
Steel Beams ◽  
Element Analysis ◽  
Content Type ◽  
Steel Members ◽  
Resistance Reduction

Purpose The purpose of this paper is to present the effect of damaged fireproofing on structural steel members. This study will show that a minor damage in fireproofing will reduce the fire rating of members significantly. Damaged fireproofing happens in structures due to various reasons, and the question is always how effective is this fireproofing? This paper presents the results of one type of fireproofing and presents a parametric study on the size of damage and its effect on fire resistance of structural steel members. Design/methodology/approach The study has been performed using numerical methods, thermal and structural finite element analysis. The analysis method has been verified by experimental results. Findings Small fire protection damage or loss leads to significant rise of temperature at the damaged parts and causes severe fire resistance reduction of beams. The higher fire protection damage’s extension at the bottom flange of the steel beams does not have any major influence on the rate of reduction of fire resistance of the beams. Steel beams experience greater fire resistance reduction at higher load levels because of the existing of higher stresses and loads within the steel beam section. Research limitations/implications The study has been performed using finite element analysis, and it covers a wide range of practical sizes. However, experimental work will be performed by the researchers when funding is granted. Practical implications The study provides researchers and practitioners with an estimate on the effect of damaged fireproofing on fire resistance of structural steel beams. Social implications Understanding the effect of the effect of damaged fireproofing helps in estimating the fire resistance of structural steel members, which may protect collapses and disasters. Originality/value The research is original; extensive literature review has been performed, and this research is original.

scholarly journals Analysis of a Support Base Stand using Finite Element Analysis

2021 ◽  
Vol 18 (1) ◽  
pp. 14-21
Author(s):  
A. Muhammad ◽  
I.H. Shanono
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Carbon Fiber ◽  
Structural Steel ◽  
Copper Alloy ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Applied Loading ◽  
Von Mises ◽  
Ansys Workbench

In this paper, deformation, Von-Mises stress, and failure analysis were carried out on a base stand using ANSYS workbench. The structural design was carried out using SolidWorks software and then imported into the ANSYS workbench for analysis. The investigation is performed using four different materials, i.e., structural steel, aluminum alloy, carbon fiber, and copper alloy, with an applied loading force of 1000 N at the tip of the structure. This technique highlights a complete reaction of the structure to the loading force, therefore providing room for structural optimization to reduce the risk of unexpected failure and unnecessary material wastage. The results obtained were compared and analyzed to identify the best material capable of withstanding the subjected force. Based on the Von-mises result, Carbon fiber has the highest possible maximum stress value of 4.70e+07 Pa, followed by structural steel, then Copper alloy. At the same time, the aluminium alloy has the least minimum Von-Mises. Structural steel is the very best option based upon the analysis outcomes. Its factor of safety is above unity in all the designs, which indicates that the structure has been over-designed. For that reason, it is suggested that the structure needs to be enhanced. Keywords: Finite element analysis, base stand, ANSYS, deformation, von mises stress.

Case Study to Evaluate Stresses in Welded Endplates in Structural Steel

2021 ◽  
Author(s):  
Kshitij P. Gawande ◽  
Alex Mayes ◽  
Raju Subedi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Steel Structures ◽  
Element Model ◽  
Tube Steel ◽  
Element Analysis ◽  
Building Frames ◽  
Steel Members ◽  
Welded Connection

Abstract Endplates are widely used in the industry to attach supplementary steel structures to main building frames. These endplates can be attached to the building steel using a bolted connection or a welded connection. Industry often favors bolted connections due to ease of installation and availability of qualification methods per AISC 360 Design Guides. However, there are some applications where a welded connection is preferable, such as, cases requiring reduction of number of parts supplied or applications with higher chance of vibration causing loosening of bolts. The present case study discusses evaluation of stresses in welded endplates due to forces and moments from the attaching supplementary steel members. The study considers various welded connection scenarios including an endplate welded on two opposite sides and an endplate welded on all four sides. The stress distribution in the plate is studied using finite element analysis with wide flange and tube steel members attaching to it. ANSYS mechanical is used to perform the finite element analysis. Multiple combinations of plate sizes, weld patterns, and attaching member sizes are analyzed to provide a well-rounded solution. An analytical model is developed for the stress evaluation as well and the results are compared with the finite element model. The study is intended to provide an efficient methodology for plate evaluation and qualification.

scholarly journals Experimental and numerical evaluation of the axial capacity of cracked tubular members

2021 ◽  
Vol 1201 (1) ◽  
pp. 012053
Author(s):  
S Riise ◽  
M R Vågen ◽  
M Atteya ◽  
G Ersdal
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Tests ◽  
Element Analysis ◽  
Axial Capacity ◽  
Steel Members ◽  
Safe Side ◽  
Crack Tips ◽  
Numerical Finite Element ◽  
Good Agreement

Abstract This paper presents the experimental and numerical results for the axial capacity of cracked tubular steel members. Experimental tests of 11 columns in compression with simulated cracks of different sizes, defined as the percentage of the circumference (12%, 23.5% and 38.5%). The crack-tips were further treated by drilling a crack arresting hole. These specimens were then modelled by finite element analysis which were verified to match the experimental test. The DNVGL-RP-C208 standard was used as basis for performing the numerical finite element analysis. In addition, the capacity of the columns was calculated according to the 2004 revision of the NORSOK N-004 standard. The experimental tests indicated that the capacity in compression did not change significantly with the presence of cracks and crack arresting holes. The results from the numerical finite element analysis show a good agreement with the experimental work. However, the compressive capacity according to NORSOK N-004 shows a significant deviation to the safe side.

FRP-FLEXURAL STRENGTHENING OF STEEL BEAMS: A FINITE ELEMENT ANALYSIS STUDY

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Bibek Regmi Bagale ◽  
Azadeh Parvin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fiber Reinforced Polymer ◽  
Steel Beam ◽  
Beam Model ◽  
Fiber Reinforced ◽  
Element Analysis ◽  
Finite Element Software ◽  
Reinforced Polymer ◽  
Steel Members

Fiber reinforced polymer (FRP) strengthening has been widely used for concrete structures. However, limited studies have been conducted on its application to steel structures. The use of FRP materials to retrofit steel members is an effective replacement for welded or bolted steel plates and offer high strength-to-weight ratio, resilience to environmental degradation, and a robust fatigue performance. Past studies have shown that the application of FRP to steel is a promising technical solution to help against corrosion and also to increase the load carrying capacity of steel members. In the present study, finite element analysis (FEA) model of a steel beam strengthened with carbon fiber reinforced polymer (CFRP) laminates was developed using ANSYS Mechanical finite element software program. The model was validated by comparing the FEA and experimental results of an existing study in the literature and they were in good agreement. A parametric study was conducted on the validated steel beam model with the aim to investigate the effects of basalt fiber reinforced polymer (BFRP) and two types of adhesives on its performance under static loading. The FRP laminates provided an increase in flexural capacity and pseudo ductility of the beams. The optimum bond length was found to be 2/5 of the span length for the beam in this study.

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