Imaging Tools for Evaluation of Gusset Plate Connections in Steel Truss Bridges

Higgins, Christopher; Turan, Osman

doi:10.1061/(asce)be.1943-5592.0000358

Cited by 14 publications

(13 citation statements)

References 22 publications

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“…Buckling analysis under compression loads of the gusset plates were carried out using a finite element software (Higgins et al, 2016 ;Scott et al, 2008). A three-dimensional (3D) finite element model was developed from the plate corner locations and fastener locations of the steel gusset plate in this software.…”

Section: Methods and Software (Higgins Et Al 2016)mentioning

confidence: 99%

“…More information on the plasticity model and plane stress formulation of the model can be found in (Higgins et al, 2016 ;Simo, Hughes 1998). Mesh of MITC4 shell elements (Dvorkin , Bathe, 1984), were used in the software.…”

Section: Plate Stress Conditionmentioning

confidence: 99%

“…Bu çalışmada çelik guse plakların burkulma davranışları incelenmiştir. Çelik guse plaklarının sonlu elemanlar yöntemine göre basınç yükü altındaki analizinde, (Higgins et al, 2016 ;Scott et al, 2008) tarafindan hazırlanmış bir program kullanılmıştır. Analizlerde tek eksenli gerilme şekil değiştirme plastisite modeli göz önüne alınmıştır.…”

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Çeli̇k Guse (Bi̇rleşi̇m) Plaklari Üzeri̇ne Anali̇ti̇k Bi̇r Çalişma

Yanik

Higgins

Scott

2019

Mühendislik Bilimleri Ve Tasarım Dergisi

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, collapsed, resulting in 13 deaths and 145 injuries. The cause of the collapse was a design flaw resulted in week gusset plate connection. This very tragic example showed us again that, gusset plate design and implementation on bridges have crucial importance. Designers should give significant consideration during the design of steel gusset plate connections. In this study, the buckling behavior of steel gusset plates was investigated. An automated finite-element analysis program (Higgins et al.,2016 ; Scott et al., 2008), was used to analyze the steel gusset plates behavior under compression load. An uniaxial stress strain plasticity model was considered in the analysis. The stress-strain relationship of the steel gusset plates was defined in three dimensions. Nonlinear static analysis of the gusset plates were performed. Different out of plane imperfection, different slenderness ratios, different element sizes were considered during the analysis. The effect of change in the fastener(bolt) location on the steel gusset plates were also examined. Normalization of the ultimate failure loads of the given gusset plate with the critical Euler's buckling load was defined. The variation of this normalization with respect to the change in the steel gusset plate parameters was analyzed. It was obtained that, imperfections have significant effect on the displacement capacity of the steel gusset plates under compression loads.

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Section: Methods and Software (Higgins Et Al 2016)mentioning

confidence: 99%

Section: Plate Stress Conditionmentioning

confidence: 99%

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Çeli̇k Guse (Bi̇rleşi̇m) Plaklari Üzeri̇ne Anali̇ti̇k Bi̇r Çalişma

Yanik

Higgins

Scott

2019

Mühendislik Bilimleri Ve Tasarım Dergisi

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“…and Shinozuka 2006;Rathinam et al 2008;Ye et al 2011). Several studies also presented use of video cameras for condition monitoring of structures (Catbas et al 2012;Fraser 2006;Fraser et al 2010;Golparvar-Fard et al 2012;Guo et al 2009;Hanji et al 2003;Higgins and Turan 2011;Laefer et al 2010;Zaurin and Catbas 2009;Zaurin and Catbas 2011). Image analysis techniques have also been investigated for corrosion monitoring of structures.…”

Section: Recent Related Literaturementioning

confidence: 99%

Critical Issues, Condition Assessment and Monitoring of Movable Bridges: Image Processing for Open Gear Monitoring

Gül¹,

Çatbaş²

2013

Structures Congress 2013

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Movable bridges are one of the least studied bridge types. In this paper, examples from a movable bridge evaluation study are presented based on the research conducted on a movable bridge in Florida over the last several years. Movable bridges face operational and maintenance challenges mainly due to complex structural, mechanical and electrical systems, which at the same time provide their versatility. Although there are a few studies focusing on movable bridges, none of these studies provide a complete list of the problems related to the condition of movable bridge populations in conjunction with possible monitoring applications specific to these bridges. This study summarizes these issues related to movable bridges considering both the structural and mechanical components. After presenting the design and implementation of a monitoring system to a representative bascule bridge, analysis of image data for evaluating the lubrication levels in an open gear is presented. The findings from this analysis are compared with the maintenance logs. It is shown that continuous monitoring may provide invaluable information about safe, reliable and cost-effective operation and maintenance of movable bridges.

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“…A radiographic testing approach has been developed to identify the pattern of section loss in gusset plates (Ocel 2012). Higgins and Turan (2013) recently developed digital imaging tools for evaluation of gusset plate connections in steel truss bridges. The geometric dimensions of the gusset plate and fasters were measured by processing the taken images.…”

Section: Introductionmentioning

confidence: 99%

Health monitoring of joint conditions in steel truss bridges with relative displacement sensors

Hao

2016

Measurement

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This paper investigates the feasibility and effectiveness of using a recently developed relative displacement sensor for the structural health monitoring of joint conditions in steel truss bridges. The developed relative displacement sensor is an innovative design offering some advantages and unique features, and is a much easier and economical method for structural health monitoring due to the simplicity of its direct measurement of relative displacement without the requirement for a stable reference point. To investigate the performance of applying the developed relative displacement sensors for structural joint condition monitoring, a steel truss bridge model is fabricated in the laboratory and installed with the relative displacement sensors to detect the health conditions of joint connections.The dynamic relative displacement measurements are analyzed with a time-frequency analysis method, i.e. continuous wavelet transform, which is a well-practiced signal processing technique to identify the structural condition change, namely the loosen bolt damage in the joint connection of steel truss bridges under ambient vibrations. The sensitivity range of the developed sensor is also investigated to see how sensitive the sensor is to identify the local bolt damage. Relative displacement measurements of the steel truss bridge 1 models under free vibration tests from both undamaged and damaged states are also analyzed, and a damage index based on the change in the percentages of a specific wavelet packet component to the total wavelet packet energy between the undamaged and damaged states is used to detect the existence of the loosen bolt damage in steel truss bridges. Experimental studies demonstrate that the developed relative displacement sensor has a sensitive performance to identify and assess the joint conditions in steel truss bridges.

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Imaging Tools for Evaluation of Gusset Plate Connections in Steel Truss Bridges

Cited by 14 publications

References 22 publications

Çeli̇k Guse (Bi̇rleşi̇m) Plaklari Üzeri̇ne Anali̇ti̇k Bi̇r Çalişma

Çeli̇k Guse (Bi̇rleşi̇m) Plaklari Üzeri̇ne Anali̇ti̇k Bi̇r Çalişma

Critical Issues, Condition Assessment and Monitoring of Movable Bridges: Image Processing for Open Gear Monitoring

Health monitoring of joint conditions in steel truss bridges with relative displacement sensors

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