Material and Geometrical Characteristics of Structural Steels Based on Statistical Analysis of Metallurgical Products

Kala, Zdeněk; Melcher, Jindřich; Puklický, Libor

doi:10.3846/1392-3730.2009.15.299-307

Cited by 68 publications

(28 citation statements)

References 22 publications

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“…Overall, it was therefore necessary to calculate 157500 resistance values M d . The experimentally obtained geometrical characteristics of the profile IPE 220 [15], material characteristics of the steel grade S235 [16], and initial imperfections e 0 a a 0 were input random quantities. Their values are given in Table 1.…”

Section: Stochastic Analysis Of the Resistancementioning

confidence: 99%

The influence of correlation between initial axis curvature and cross-section rotation on the beam static resistance

Valeš¹

2015

AIP Conference Proceedings

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The paper deals with statistical analysis of the resistance of simply supported I-beams subjected to bending. The resistance was solved by applying the geometrically nonlinear solution. The influence of lateral-beam buckling on resistance is studied. Initial geometrical imperfections originating from the first eigenmode of lateral-beam buckling and from the cross section rotation at the stability lost were ascribed to the beams. These imperfections consist of initial axial lateral buckling and rotation of cross sections along the beam axis length. The correlation between the amplitudes of these imperfections is considered to be the parameter of solutions within the interval from -1 to 1. The influence of this correlation on the change of mean values and standard deviations of random resistance of beams with nondimensional slenderness close to 1 is studied. The imperfections mentioned were considered, together with geometrical and material characteristics of cross section and material characteristics of steel, to be random quantities.

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Section: Stochastic Analysis Of the Resistancementioning

confidence: 99%

The influence of correlation between initial axis curvature and cross-section rotation on the beam static resistance

Valeš¹

2015

AIP Conference Proceedings

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“…In the above two papers the imperfections in the strength, modulus and geometric profiles of the girders were assumed to be normally distributed. Statistical evaluations of material and geometrical characteristics of steel girders made of structural steels (Czech steel) were carried out through experimental measurements by Melcher et al (2004), Melcher et al (2008) and Kala et al (2009). They evaluated yield strength, tensile strength, ductility and geometrical profiles of the girder crosssections and determined their statistical characteristics.…”

Section: Introductionmentioning

confidence: 99%

Effect of variation of component dimensions and weld profiles on the free vibration response of stiffened plates

2011

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This investigation focused on the variations observed in the natural frequencies of fabricated stiffened plates, due to the inherent variations obtained in dimensions of components and in the spacing between the girders of stiffened plates; also the variations in the size of weld profiles connecting the various components were taken into account. The present analytical study was based on the earlier experimental work done by Agung Budipriyanto (2005) in his PhD thesis. Both experimental and numerical investigations were carried out for determining the free vibration responses of the stiffened plates considered above. 99.73% confidence level of the normally distributed, measured data sets, lying between µ−3σ and µ+3σ were used to generate finite element analysis (FEA) models. The FEA models were categorized as models without and with weld profiles. From all the analyses, it was observed that the variation in dimensions of components of stiffened plates and in weld profiles produced a maximum variation in natural frequencies between −5.04% to +4.59%. If differences much larger than these differences (between the virgin and the present state) are observed during the dynamic monitoring of the ship, immediately more detailed diagnostic, prognostic and remedial measures should be instituted so that the operational sequences do not lead to further incapacitating damages in the ship.

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“…Experimentally obtained cross-section geometry and material characteristics of steel products manufactured by a dominant Czech producer (Melcher et al 2004;Kala et al 2009) were used in the presented study. For nonmeasured quantities (e.g., Young's modulus), the study was based on data obtained from technical literature; e.g., statistical characteristics of Young's modulus are given in Soares (1988).…”

Section: Fig 6 Sway and Bow Random Imperfectionmentioning

confidence: 99%

Geometrically Non-Linear Finite Element Reliability Analysis of Steel Plane Frames With Initial Imperfections / Plieninių Rėmų Su Defektais Geometriškai Netiesinė Baigtinių Elementų Patikimumo Analizė

Kala

2012

Journal of Civil Engineering and Management

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Abstract. The random load carrying capacity of steel plane frames with bracing stiffness is studied. The load carrying capacity is evaluated using the geometrically non-linear FEM analysis. The incremental stiffness matrix of a slightly curved element utilized in the non-linear incremental analysis is listed. Initial imperfections are considered as random variables. Statistical analysis and Sobol sensitivity analysis are performed using the Latin Hypercube Sampling method. The effect of initial random imperfections on the load carrying capacity is studied, whilst assuming constant slenderness of the columns. The evaluation parameters are the pair of non-random values of elastic bracing stiffness, and system length of the columns. The paper illustrates that the load carrying capacity is very sensitive to initial crookedness of the columns in the event that the non-sway (symmetric) and sway (anti-symmetric) buckling modes coincide. In this case, the design load carrying capacity obtained from statistical analysis according to the EN 1990the EN (2002 standard is relatively very small (of low safety). Results show that the reliability of design of a steel frame according to EUROCODE 3 (1993) is significantly misaligned. The significance of the first and the second buckling forces as indicators of sensitivity of the load carrying capacity to the imperfections is discussed.

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Material and Geometrical Characteristics of Structural Steels Based on Statistical Analysis of Metallurgical Products

Cited by 68 publications

References 22 publications

The influence of correlation between initial axis curvature and cross-section rotation on the beam static resistance

The influence of correlation between initial axis curvature and cross-section rotation on the beam static resistance

Effect of variation of component dimensions and weld profiles on the free vibration response of stiffened plates

Geometrically Non-Linear Finite Element Reliability Analysis of Steel Plane Frames With Initial Imperfections / Plieninių Rėmų Su Defektais Geometriškai Netiesinė Baigtinių Elementų Patikimumo Analizė

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