Shear resistance of longitudinally stiffened panels—Part 1: Tests and numerical analysis of imperfections

Pavlovčič, Luka; Detzel, Annette; Kuhlmann, Ulrike; Beg, Darko

doi:10.1016/j.jcsr.2006.05.008

Cited by 32 publications

(19 citation statements)

References 5 publications

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“…The basic numerical models with one trapezoidal stiffener in the panel mid-height or at the panel upper third were verified against test results, presented in Part 1 of this paper [12], and the simplification to one-panel models is justified in the test report [17]. A nonlinear finite element analysis with a large displacement theory was carried out using commercial FEA code ABAQUS [18].…”

Section: Fe Modellingmentioning

confidence: 99%

“…The most unfavourable imperfection shape was searched by trial combining global stiffener imperfections with local imperfections in sub-panels and bow twist of open stiffeners as demonstrated in Part 1 [12]. Although with the help of some strategies for imperfection modelling, given in [12], and further consideration of similarity between some stiffening cases, on average for each calculated point six trials were used to obtain one of the most relevant imperfection shape. In the case of two stiffeners the oppositely sided (antisymmetrical) stiffener deflections were taken as the critical global imperfection.…”

Section: Fe Modellingmentioning

confidence: 99%

“…In the case of two stiffeners the oppositely sided (antisymmetrical) stiffener deflections were taken as the critical global imperfection. In the case of open T-stiffeners 'combined local imperfections' were considered, obtained with the perturbation analysis on geometrically perfect panel, where stiffener lateral movement was restrained, while its torsion was enabled (see [12]). …”

Section: Fe Modellingmentioning

confidence: 99%

“…Part 1 of this paper [12] presented the test results, the verification of numerical models and the imperfection study. Part 2 deals with the sensitivity of panel resistance on the variation of different parameters such as stiffener stiffness, the position and the number of longitudinal stiffeners, the panel aspect ratio, the web slenderness and the flange rigidity.…”

Section: Introductionmentioning

confidence: 99%

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Shear resistance of longitudinally stiffened panels — Part 2: Numerical parametric study

Pavlovčič

Beg

Kuhlmann

2007

Journal of Constructional Steel Research

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Section: Fe Modellingmentioning

confidence: 99%

Section: Fe Modellingmentioning

confidence: 99%

Section: Fe Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Shear resistance of longitudinally stiffened panels — Part 2: Numerical parametric study

Pavlovčič

Beg

Kuhlmann

2007

Journal of Constructional Steel Research

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“…Laboratory tests have shown that longitudinal wed stiffening enhances the ultimate resistance of plate girders under patch loading (Bergfelt 1979, Galea et al 1987, Shimizu et al 1987, Janus et al 1988, Dubas and Tschamper 1990, Markovic and Hajdin 1992, Carretero and Lebet 1998, Walbridge and Lebet 2001, Graciano and Casanova 2005, Pavlovcic et al 2007, among others). The experimental results show an increase between 5% and 60% in ultimate loads due to the inclusion of a longitudinal stiffener.…”

Section: Introductionmentioning

confidence: 99%

Effect of longitudinal stiffening on bridge girder webs at incremental launching stage

Graciano¹,

Zapata-Medina²

2015

ing.inv.

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Patch loading is a predominant load case at incremental bridge launching. Bridge girder webs are frequently provided with longitudinal stiffeners to increase in-service shear and bending strength, and its effect has been included in design codes. However, no straightforward rules are given to account for the influence of such stiffeners on improving the patch loading resistance. This paper presents a review of some available formulae found in the literature to estimate the girder ultimate strength including the provisions of the European, American and Colombian design codes. Additionally, a nonlinear finite element analysis is conducted on three case studies related to actual launched bridges. The case studies are also used to study the influence of the longitudinal stiffener and girder depth on the girder capacity. Different load-displacement responses are observed depending on the girder depth. Finally, the finite element analysis shows to what extent the longitudinal stiffeners can increase the patch loading capacity of bridge girder webs during launching.Keywords: Patch loading, longitudinal stiffeners, ultimate strength, girders, bridge launching, finite element method. RESUMENCargas concentradas son normalmente la condición de carga predominante durante el lanzamiento de puentes por empujes sucesivos, por lo cual, las almas de las vigas del puente son frecuentemente rigidizadas con placas longitudinales para incrementar la resistencia de servicio a cortante y flexión. Este efecto benéfico del rigidizador longitudinal es tomado en cuenta por varios códigos de diseño. Sin embargo, no hay normas claras que indiquen como tener en cuenta la influencia de tales rigidizadores en el incremento de la resistencia bajo cargas concentradas. Este artículo, presenta una revisión de algunas de las formulaciones disponibles en la literatura técnica para el cálculo de cargas últimas de pandeo en vigas bajo cargas concentradas incluyendo los lineamientos de los códigos de diseño Europeo, Americano y Colombiano. Adicionalmente, se presenta un análisis no lineal por elementos finitos de tres casos de estudio concernientes con el lanzamiento de puentes. Los casos de estudio son también utilizados para estudiar la influencia del rigidizador y de la profundidad de la viga en la carga última. Se observaron diferentes respuestas carga-deformación dependiendo de la profundidad de la viga y se muestra hasta qué punto los rigidizadores longitudinales pueden incrementar la capacidad de carga de vigas de puente durante su lanzamiento.Palabras clave: cargas concentradas, rigidizadores longitudinales, resistencia última, vigas, lanzamiento de puentes, método de los elementos finitos.

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16.23: A comparative analysis of longitudinal stiffener cross‐section for slender I‐girders subjected to patch loading

et al. 2017

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In the construction of traditional composite bridges whose structure consists of plate girders, the concrete slabs of the decks are often casted before launching. These thin-walled webs are occasionally reinforced with longitudinal stiffeners to increase bending and shear strengths, and for bridges erected by incremental launching, these stiffeners also provide an enhancement for patch loading resistance. Experimental works have shown that ultimate resistance to patch loading is highly dependent on the size, relative position and shape of the longitudinal stiffener. Nonetheless, a comparison between those three factors should be carried out in order to establish the optimum configuration of longitudinal stiffening for webs under compressive forces. Hence, this study attempts to compare the increase of ultimate strength of a slender I-girder subjected to concentrated load using open and closed section types of stiffeners, evaluating three different stiffeners configurations: i) a single open section stiffener, ii) multiple open section stiffeners, and iii) a single closed section stiffener. The nonlinear computations were performed using a finite element analysis parametric model, where the relative position and size of the stiffeners are varied to cover a wide range of geometries.

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Shear resistance of longitudinally stiffened panels—Part 1: Tests and numerical analysis of imperfections

Cited by 32 publications

References 5 publications

Shear resistance of longitudinally stiffened panels — Part 2: Numerical parametric study

Shear resistance of longitudinally stiffened panels — Part 2: Numerical parametric study

Effect of longitudinal stiffening on bridge girder webs at incremental launching stage

16.23: A comparative analysis of longitudinal stiffener cross‐section for slender I‐girders subjected to patch loading

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