scholarly journals Evaluation of Residual Compressive Strength and Behavior of Corrosion-Damaged Carbon Steel Tubular Members

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1254
Author(s):  
Jin-Hee Ahn ◽  
Seok-Hyeon Jeon ◽  
Young-Soo Jeong ◽  
Kwang-Il Cho ◽  
Jungwon Huh
Keyword(s):  
Compressive Strength ◽  
Failure Modes ◽  
Compressive Loading ◽  
Steel Structures ◽  
Corrosion Damage ◽  
Local Corrosion ◽  
Structural Behavior ◽  
Loading Test ◽  
Element Analysis ◽  
Cross Sectional

Local corrosion damage of steel structures can occur due to damage to the paint-coated surface of structures. Such damage can affect the structural behavior and performance of steel structures. Compressive loading tests were, thus, carried out in this study to examine the effect of local corrosion damage on the structural behavior and strength of tubular members. Artificial cross-sectional damage on the surface of the tubular members was introduced to reflect the actual corroded damage under exposure to a corrosion environment. The compressive failure modes and compressive strengths of the tubular members were compared according to the localized cross-sectional damage. The compressive loading test results showed that the compressive strengths were affected by the damaged width within a certain range. In addition, finite element analysis (FEA) was conducted with various parameters to determine the effects of the damage on the failure mode and compressive strength of the stub column. From the FEA results, the compressive strength was decreased proportionally with the equivalent cross-sectional area ratio and damaged volume ratio.

Finite Element Analysis of X-Cor Sandwich's Compressive Strength

2011 ◽  
Vol 306-307 ◽  
pp. 733-737
Author(s):  
Xu Dan Dang ◽  
Xin Li Wang ◽  
Hong Song Zhang ◽  
Jun Xiao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Compressive Strength ◽  
Failure Modes ◽  
Failure Mechanisms ◽  
Element Model ◽  
Failure Criteria ◽  
Stiffness Degradation ◽  
Element Analysis ◽  
Finite Element Software

In this article the finite element software was used to analyse the values for compressive strength of X-cor sandwich. During the analysis, the failure criteria and materials stiffness degradation rules of failure mechanisms were proposed. The failure processes and failure modes were also clarified. In the finite element model we used the distributions of failure elements to simulate the failure processes. Meanwhile the failure mechanisms of X-cor sandwich were explained. The finite element analysis indicates that the resin regions of Z-pin tips fail firstly and the Z-pins fail secondly. The dominant failure mode is the Z-pin elastic buckling and the propagation paths of failure elements are dispersive. Through contrast the finite element values and test results are consistent well and the error range is -7.6%~9.5%. Therefore the failure criteria and stiffness degradation rules are reasonable and the model can be used to predict the compressive strength of X-cor sandwich.

scholarly journals Residual Compressive Strength of Short Tubular Steel Columns with Artificially Fabricated Local Corrosion Damage

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 813
Author(s):  
Kyra Kamille Toledo ◽  
Hyoung-Seok Kim ◽  
Young-Soo Jeong ◽  
In-Tae Kim
Keyword(s):  
Compressive Strength ◽  
Numerical Study ◽  
Corrosion Damage ◽  
Reduction Factor ◽  
Local Corrosion ◽  
Percentage Error ◽  
Steel Columns ◽  
Residual Compressive Strength ◽  
Short Columns ◽  
Half Wavelength

Corrosion is considered as one of the main factors in the structural performance deterioration of steel members. In this study, experimental and numerical methods were used to assess the reduction in compressive strength of short tubular steel columns with artificially fabricated local corrosion damage. The corrosion damage was varied with different depths, heights, circumferences, and locations along the column. A parametric numerical study was performed to establish a correlation between the residual compressive strength and the severity of corrosion damage. The results showed that as the corrosion depth, height and circumference increased, the compressive strength decreased linearly. As for the corrosion height, the residual compressive strength became constant after decreasing linearly when the corrosion height was greater than the half-wavelength of buckling of the short columns. An equation is presented to evaluate the residual compressive strength of short columns with local corrosion wherein the volume of the corrosion damage was used as a reduction factor in calculating the compressive strength. The percentage error using the presented equation was found to be within 11.4%.

Energy Absorption of Thin Walled Members Under Axial Compressive Loading

2014 ◽  
Author(s):  
Eboreime Ohioma ◽  
Muhammad Ali ◽  
Khairul Alam
Keyword(s):  
Energy Absorption ◽  
Cross Sections ◽  
Compressive Loading ◽  
Thin Wall ◽  
Analysis Software ◽  
Element Analysis ◽  
Cross Sectional ◽  
Compressive Loads ◽  
Thin Walled ◽  
Deformation Modes

This study was conducted to investigate the effects of cross-sectional geometry on thin wall axial crushing members for the purpose of improved energy absorption. A total of five geometrically equivalent shapes (same wall thickness area, material, and length) were analyzed namely, triangle, rectangle, square, pentagon, and circle. The deformation modes and energy absorption of the members were studied under compressive loads and compared using ABAQUS/Explicit module, finite element analysis software. The simulations revealed that for the five geometrically equivalent cross sections under equal loading conditions, the pentagon shaped member absorbed the highest amount of energy. As compared to baseline rectangle member, the pentagon member absorbed approximately 25–28% more energy.

scholarly journals Residual Compressive Strength of Short Tubular Steel Columns with Local Corrosion Damage

2020 ◽  
Author(s):  
Kyra Kamille Toledo ◽  
Hyoung-Seok Kim ◽  
Young-Soo Jeong ◽  
In-Tae Kim
Keyword(s):  
Compressive Strength ◽  
Numerical Study ◽  
Corrosion Damage ◽  
Reduction Factor ◽  
Local Corrosion ◽  
Percentage Error ◽  
Steel Columns ◽  
Residual Compressive Strength ◽  
Short Columns ◽  
Half Wavelength

Corrosion is considered as one of the main factors in the structural performance deterioration of steel members. In this study, experimental and numerical methods were used to assess the reduction in compressive strength of short tubular steel columns with local corrosion damage. The corrosion damage was varied with different depths (0, 1.5, 2, 3, 4, 4.5, and 6 mm), height (0, 20, 40, 60, 80, 100, 120, 140, 160, and 180 mm), circumference (0, 90, 180, 270, and 360°), and location along the column. A parametric numerical study was performed to establish a correlation between the residual compressive strength and the severity of corrosion damage. The results showed that as the corrosion depth, height and circumference increased, the compressive strength decreased linearly. As for the corrosion height, the residual compressive strength became constant after decreasing linearly when the corrosion height was greater than the half-wavelength of buckling of the short columns. An equation is presented to evaluate the residual compressive strength of short columns with local corrosion wherein the volume of the corrosion damage was used as a reduction factor in calculating the compressive strength. The percentage error using the presented equation was found to be within 11.4%.

scholarly journals Shear Performance for Prestressed Concrete Hollow Core Slabs

2020 ◽  
Vol 10 (5) ◽  
pp. 1636 ◽  
Author(s):  
Yong-Jun Lee ◽  
Hyeong-Gook Kim ◽  
Min-Jun Kim ◽  
Dong-Hwan Kim ◽  
Kil-Hee Kim
Keyword(s):  
Compressive Strength ◽  
Shear Strength ◽  
Prestressed Concrete ◽  
Hollow Core ◽  
Loading Test ◽  
Cross Sectional ◽  
Simply Supported ◽  
Shear Performance ◽  
Compressive Strength Of Concrete ◽  
The Web

This study evaluated the shear performance of prestressed concrete hollow core slabs (HCS), which are convenient to use as floor structures of flexible spaces. A total of 18 specimens, with cross-sectional height and presence of topping concrete as variables, were fabricated by extrusion. A four-point loading test was conducted using simply supported beams. The results showed that shear performance satisfied the requirements of ACI 318-19 regardless of cross-sectional height or presence of topping concrete. Through comparison with past studies, the web-shear strength of HCS was found to be influenced by compressive stress due to prestress at the centroid, compressive strength of concrete, and shear span-to-depth ratio.

An Experimental Study on the Structural Behavior of Water and Wastewater Supply GFRP Pipe

2017 ◽  
Vol 753 ◽  
pp. 65-70
Author(s):  
Sun Hee Kim ◽  
Soon Jong Yoon ◽  
Won Chang Choi
Keyword(s):  
Finite Element ◽  
Parallel Plate ◽  
Structural Behavior ◽  
Compression Tests ◽  
Loading Test ◽  
Element Analysis ◽  
Glass Fiber Reinforced ◽  
Tension And Compression ◽  
Loading Tests ◽  
Plate Loading

In this paper, the results of experimental and analytical investigations pertaining to the structural behavior of glass fiber reinforced polymer plastic (GFRP) pipes are presented. GFRP is assumed as an orthotropic material. Mechanical properties along the longitudinal and hoop direction of the pipes are determined by the tension and compression tests. The parallel plate loading tests for the GFRP pipes were conducted to findthe relation between load and ring deflection. Inaddition, the finite element analysis (FEA) for the GFRP pipes was conducted using the material properties obtained from test in the study. The numerical results obtained by the finite element method show good agreement with the parallel plate loading test results for GFRP pipes.

Tests and Numerical Simulation on Short Composite-Sectioned Concrete Filled Steel Tubular Columns Subjected to Axial Compressive Loading

2011 ◽  
Vol 374-377 ◽  
pp. 2265-2270
Author(s):  
Yang Zhang ◽  
Jia Ru Qian ◽  
Xiao Dong Ji ◽  
Wan Lin Cao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Compressive Strength ◽  
Compressive Loading ◽  
Steel Tube ◽  
Test Results ◽  
Element Analysis ◽  
Linear Finite Element ◽  
Axial Compressive Strength ◽  
Good Agreement

In this paper, axial compressive loading test and non-linear finite element analysis of 10 short composite-sectioned concrete filled steel tubular column specimens are introduced. The test results indicate that the failure modes of all the specimens are similar, the specimens have high axial compressive strength and large deformation capacity. The calculated axial compressive strength of the specimens, assuming that the circle steel tube provides the lateral confinement to the core concrete and the square steel tube provides compressive strength without contributing lateral confinement to the concrete, has good agreement with the measured strength. The vertical load-strain curves, the axial compressive strength and the failure mode obtained by the non-linear finite element analysis of specimens have good agreement with the test results.

Shear Strength of the Perfobond Connection of a Steel-Concrete Composite Slim Floor System

2015 ◽  
Vol 764-765 ◽  
pp. 1134-1138
Author(s):  
Hong C. Rhim ◽  
Kwang Ho Lee ◽  
Won Seok Jang ◽  
Seong Hoon Jeong ◽  
Dae Jin Kim ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Shear Strength ◽  
Structural Behavior ◽  
Test Results ◽  
Analysis Model ◽  
Element Analysis ◽  
Cross Sectional ◽  
Finite Element Analysis Model ◽  
Floor System ◽  
Push Out

The use of steel-concrete composite members has been significantly increased as they have the advantages of the reduction of cross sectional areas, excellent ductility against earthquake loadings and a longer life span than typical steel frame members. In this paper, push-out tests were performed on six specimens to investigate the structural behavior and shear strength of perfobond connection of a steel-concrete composite slim floor system. An equation to theoretically estimate the shear strength of the perfobond connection is proposed, and its accuracy is examined by comparing its predictions with the test results. A finite element analysis model is also developed and used to confirm the effectiveness of the proposed strength equation.

STABILITY BEHAVIOR AND DESIGN OF NONCONVENTIONAL COLD-FORMED STEEL STRUCTURES — RESEARCH REVIEW

2011 ◽  
Vol 11 (05) ◽  
pp. 903-927 ◽  
Author(s):  
LÁSZLÓ DUNAI ◽  
GÁBOR JAKAB
Keyword(s):  
Laboratory Tests ◽  
Method Development ◽  
Failure Modes ◽  
Design Method ◽  
Numerical Models ◽  
Steel Structures ◽  
Product Line ◽  
Research Review ◽  
Cross Sectional ◽  
Cold Formed Steel

In the paper, the methodology and main results of two research projects on nonconventional cold-formed thin-walled steel structures are presented. Laboratory tests, standard-based calculations, numerical models, and the connection of these to design method development are summarized. The implementation of the methodology is presented on two areas in detail: CompressionC-section members and a truss made of C-section members. The studied CompressionC-section members are of various cross-sectional arrangement and end- and lateral-supporting conditions. They consist of single or double asymmetric C-section members; in the latter case, either a back-to-back arrangement is applied or two sections are stuck in each other, forming a box-like closed section. The applied load is in each case compression with different eccentricities. Test arrangement, program, and results are presented; measured load-bearing capacities are compared to resistances calculated according to Eurocode 3, Part 1–3 where applicable, design rules for the cases not covered by the code are proposed. Trusses made of C-sections from the same product line are analyzed in the light of full-scale laboratory tests. EC3-based design formulae are derived for the failure modes obtained in the tests either by modifying existing application rules or by deriving new ones from these. Advanced numerical models of both structures are presented with focus on modeling imperfections, bolted connections, and joint rigidities.

scholarly journals Compressive strength of partially stiffened cylinders at elevated temperatures

2020 ◽  
Vol 19 (1) ◽  
pp. 131-142
Author(s):  
Egler Araque ◽  
Carlos Graciano ◽  
David G. Zapata-Medina ◽  
Octavio Andrés González-Estrada
Keyword(s):  
Compressive Strength ◽  
Elevated Temperature ◽  
Elevated Temperatures ◽  
Compressive Loading ◽  
Structural Response ◽  
Pressure Vessels ◽  
Element Analysis ◽  
Pressure Profiles ◽  
Complex Design ◽  
The Finite Element Analysis

This work presents the finite element analysis of partially stiffened cylinders subjected to axial compression at elevated temperatures. The compressive strength is calculated for self-weight conditions and the influence of the temperature on the material response is also investigated. In the oil industry, pressure vessels are commonly used operating at complex design conditions such as high-pressure profiles and/or elevated temperature gradients which affect considerably the structural response of inner components. Among them, risers become sensitive steel elements withstanding heavy compressive loading due to self-weight, as well as, insulation elements added toprotect them from the elevated temperature gradient. Most risers structurally fail at the bottom end due to buckling caused by self-weight and temperature effects. To remediate this situation and to guarantee the integrity of the riser, longitudinal stiffeners are welded at the bottom end. Hence, a proper determination of the compressive strength of the cylinder, taking into account the influence of the longitudinal stiffening and the corresponding temperature, is required.Results indicate that the use oflongitudinal stiffeners in deformed cylinders increases the strength to buckling in percentages that vary according to the cross-section of the profiles.

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