Finite element modeling of structural steel component failure at elevated temperatures

Seif, Mina; Main, Joseph A.; Weigand, Jonathan M.; McAllister, Therese P.; Luecke, William E.

doi:10.1016/j.istruc.2016.03.002

“…An equation for the engineering strain at the onset of necking (i.e., the uniform strain), was determined based on nonlinear least-squares regression of data available in the literature (Fig. 2-7(a)) as (Seif et al 2016 where eu0 is the uniform strain at ambient temperature, q1 = 3.587, and q3 = 488 °C. The data included in Fig.…”

Section: Methods For Calculating Parametersmentioning

confidence: 99%

Temperature-Dependent Material Modeling for Structural Steels: Formulation and Application

Seif¹,

Main²,

Weigand³

et al. 2016

Self Cite

View full text Add to dashboard Cite

The policy of the National Institute of Standards and Technology is to use metric units in all its published materials. Because this report is intended for the U.S. building construction industry, which uses inch-pound units, it is more practical and less confusing to use inch-pound units, in some cases, rather than metric units. However, in most cases, units are presented in both metric and the inch-pound system. Certain commercial entities, equipment, products, or materials are identified in this document in order to describe a procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, products, materials, or equipment are necessarily the best available for the purpose. Another policy of the National Institute of Standards and Technology is to include statements of uncertainty with all NIST measurements. In this document, however, some measurements of authors outside of NIST are presented, for which uncertainties were not reported and are unknown.

show abstract

“…The steel sheets integrated into the FE numerical simulation models were expected to have linear elasticity. The elastic modulus and the stress-strain engineering relationships that depend upon the experimental test specimens which were done in this research and the Poisson ratio of 0.3 was applied [14,15]. The maximum size of the meshing elements was taken as being 1 mm in length, 1 mm in width, and 1 mm in height.…”

Section: Experimental Test Specimensmentioning

confidence: 99%

“…Nowadays, finite-element FE modeling and simulation techniques are widely used in research involving structural analysis and design, especially of structural steel elements [14,15]. In some research, FE modeling techniques are often used to expand the limitations of the experimental testing analysis, because of the difficulty of implementation or high cost, and are also used to investigate the different parameters which that affect the problem study.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Perforated Steel Sheets Under Uni-Axial Tensile Force

Sayed

¹

2019

Metals

View full text Add to dashboard Cite

The perforated steel sheets have many uses, so they should be studied under the influence of the uniaxial tensile load. The presence of these holes in the steel sheets certainly affects the mechanical properties. This paper aims at studying the behavior of the stress-strain engineering relationships of the perforated steel sheets. To achieve this, the three-dimensional finite element (FE) model is mainly designed to investigate the effect of this condition. Experimental tests were carried out on solid specimens to be used in the test of model accuracy of the FE simulation. Simulation testing shows that the FE modeling revealed the ability to calculate the stress-strain engineering relationships of perforated steel sheets. It can be concluded that the effect of a perforated rhombus shape is greater than the others, and perforated square shape has no effect on the stress-strain engineering relationships. The efficiency of the perforated staggered or linearly distribution shapes with the actual net area on the applied loads has the opposite effect, as it reduces the load capacity for all types of perforated shapes. Despite the decrease in load capacity, it improves the properties of the steel sheets.

show abstract

“…Thus, a key issue in evaluating the response of structural systems to fire effects is the proper representation of material behavior, including fracture, at elevated temperatures. Temperature-dependent material behavior of structural plate materials (such as ASTM A36 (2014a), ASTM A572 (2013a), and ASTMA992(2011a)), has been studied both experimentally and numerically (e.g., Seif et al (2016bSeif et al ( , 2016c, and Hu et al (2009)). However, the behavior of high-strength structural bolts at elevated temperatures, especially under shear loading, is not well established in the literature.…”

Section: Motivationmentioning

confidence: 99%

Shear behavior of high-strength bolts at elevated temperatures: testing and formulation of reduced-order model

Seif¹,

Weigand²,

Main³

et al. 2018

Self Cite

0

View full text Add to dashboard Cite

The policy of the National Institute of Standards and Technology is to use metric units in all its published materials. Because this report is intended for the U.S. building construction industry, which uses inch-pound units, it is more practical and less confusing to use inch-pound units, in some cases, rather than metric units. However, in most cases, units are presented in both metric and the inch-pound system. ABSTRACTThe behavior of high-strength structural steel bolts at elevated temperatures, especially under shear loading, is very limited in the literature. This report presents the test results, as well as a reduced order modeling approach of high-strength structural bolts subject to double-shear loading at elevated temperatures. First, it presents results from a recently conducted experimental study. The parameters varied between tests included the bolt grade, bolt diameter, and temperature. Bolt grades A325 and A490 were tested. For each bolt grade, three different diameters were tested (19 mm (3/4 in), 22 mm (7/8 in), and 25.4 mm (1 in)) at five different temperatures (20 ºC, 200 ºC, 400 ºC, 500 ºC, and 600 ºC). At least three tests were conducted for each combination of parameters. Degradations in the mechanical and material properties including stiffness, strength, and deformation at fracture, are characterized and presented. The results from these experiments fill a critical knowledge gap currently present in the literature regarding the behavior of highstrength structural bolts under shear loading at elevated temperatures. These data will ultimately provide a thorough understanding of the overall behavior of structural steel systems under realistic fire loading by clarifying the (i) shear behavior of high-strength structural steel bolts at elevated temperatures, and (ii) degradation in the mechanical and material properties of high-strength steel bolts with increasing temperatures. The report then describes the formulation of an empirical component-based model for shear behavior of high-strength bolts developed based on the data from the double-shear testing of highstrength bolts at elevated temperatures. Such component-based models are computationally efficient, facilitating large building-level analyses where high-fidelity modeling of the bolts would be infeasible. The component-based model is shown to accurately account for the temperaturedependent degradation of bolt shear strength and stiffness, while also providing the capability to model load reversal and bolt-shear rupture.

show abstract

Finite element modeling of structural steel component failure at elevated temperatures

Cited by 38 publications

References 7 publications

Temperature-Dependent Material Modeling for Structural Steels: Formulation and Application

Temperature-Dependent Material Modeling for Structural Steels: Formulation and Application

Numerical Analysis of the Perforated Steel Sheets Under Uni-Axial Tensile Force

Shear behavior of high-strength bolts at elevated temperatures: testing and formulation of reduced-order model

Contact Info

Product

Resources

About