Finite-Element Modeling of Twin Steel Box-Girder Bridges for Redundancy Evaluation

Kim, Jang Hwan; Williamson, Eric B.

doi:10.1061/(asce)be.1943-5592.0000706

Cited by 13 publications

(6 citation statements)

References 11 publications

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“…In this method, the shear and tension failure modes of stud connections could be accounted for by including the inter action effect. In this study, the techniques proposed by Kim and Williamson [16,22] were utilized for the material nonlinearities and stud connection failures.…”

Section: Materials Non-linearities and Stud Connectionmentioning

confidence: 99%

“…For this purpose, finite element (FE) bridge models were constructed to simulate the possible failure modes of external cross-frame members, such as section yielding and buckling behaviors. In addition, various failure behaviors required for redundancy evaluation, such as large deflections, material inelasticity of concrete and steel, and stud connection failure, were incorporated into the models based on the modeling techniques proposed by Kim and Williamson [16]. It was assumed that one of the two girders was fully fractured, and truck live loads were applied to the damaged girder side to generate the maximum bending moment at the fracture location.…”

Section: Introductionmentioning

confidence: 99%

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Effects of External Cross-Frames on the Ultimate Behavior of a Twin Steel Trapezoidal Box-Girder Bridge

Kim,

Kwon,

Kim

2023

Applied Sciences

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In the construction of a twin-steel box-girder bridge, external cross-frames are temporarily used to increase torsional resistance. These members are regarded as secondary and are removed after a composite action in the bridge is achieved. Recently, attention has been paid to the possibility that external cross-frames can be a redundant source in bridges with girder fractures. In this study, the effects of external cross-frames on a damaged bridge were investigated using finite-element bridge models. Therefore, full-scale bridge models of a twin-steel trapezoidal box-girder bridge were constructed using K-type external cross-frames. Various failure modes, including the buckling and yielding of the cross-frames, were incorporated into the bridge models to account for realistic behaviors in the damaged bridge. The analysis results showed that the external cross-frames increased the load-carrying capacity of the bridge with one-girder fracture damage by transversely redistributing the live loads.

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Section: Materials Non-linearities and Stud Connectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of External Cross-Frames on the Ultimate Behavior of a Twin Steel Trapezoidal Box-Girder Bridge

Kim,

Kwon,

Kim

2023

Applied Sciences

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“…Recent studies on the reserved capacity of bridges and redundancy evaluation have mainly focused on the steel I-girder and box-girder bridges with a partial or full-depth fracture of one of the girders [14][15][16][17][18][19][20][21][22][23][24][25]. The results of these studies demonstrated a high level of internal redundancy and secondary load paths in the bridge systems.…”

Section: Of 14mentioning

confidence: 99%

Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

Abedin

Mehrabi

2020

Infrastructures

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In steel girder bridges, fracture of one girder may occur without noticeable bridge profile changes. It is critical to ensure that the bridge will have adequate capacity to prevent collapse until the next cycle of inspection discovers the damage. It is realized that once one of the bridge girders is fractured, vertical loads need to be distributed through an alternative path to the intact girder(s). In this case, cross-frames can play an important role in transferring the loads and preventing from sudden collapse. This paper investigates the impact of cross-frames on load distribution after a fracture is occurred in one girder. Bridge configurations with different cross-frame spacing were studied using finite element modeling and simulation of the bridge behavior with a fractured steel plate girder. Nonlinear and dynamic solution methods were used for these analyses. Results of this investigation demonstrated the important role cross-frames can play in providing some reserved capacity for the bridge with fractured girder to enhance the bridge redundancy. The contribution of the cross-frames and the behavior of the bridge after fracture in one girder however depends on the configuration of the bridge. A study of the variation of the effect of cross-frames with respect to the number of girders is also included in this paper.

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“…Recently, in 2021, Abedin and Mehrabi [29] conducted a study on modal analysis, demonstrating its suitability for evaluating the capacity of such bridges to withstand substantial damage while still supporting significant live loads. They analyzed a three-span steel bridge with twin box girders and compared their results to full-scale load test results from a simple span bridge [30][31][32]. Their findings indicated that modal sensitivities can effectively detect anticipated damage in simple and continuous span bridges, especially in cases where the frequency change method may not offer sufficient sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Multi-Span Box Girder Bridge Sensitivity Analysis in Response to Damage Scenarios

Brinissat,

Ray,

Kuti

2024

Buildings

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Due to their distinct features, including structural simplicity and exceptional load-carrying capacity, steel box girder bridges play a critical role in transportation networks. However, they are categorized as fracture-critical structures and face significant challenges. These challenges stem from the overloading and the relentless effects of corrosion and aging on critical structural components. As a result, these bridges require thorough inspections to ensure their safety and integrity. This paper introduces generalized approaches based on vibration-based structural health monitoring in response to this need. This approach assesses the condition of critical members in a steel girder bridge and evaluates their sensitivity to damage. A rigorous analytical evaluation demonstrated the effectiveness of the proposed approach in evaluating the Szapáry multi-span continuous highway bridge under various damage scenarios. This evaluation necessitates extensive vibration measurements, with piezoelectric sensors capturing ambient vibrations and developing detailed finite element models of the bridge to simulate the structural behavior accurately. The results obtained from this study showed that bridge frequencies are sufficiently sensitive for identifying significant fractures in long bridges. However, the mode shape results show a better resolution when compared to the frequency changes. The findings are usually sensitive enough to identify damage at the affected locations. Amplitude changes in the mode shape help determine the location of damage. The modal assurance criterion (MAC) served to identify damage as well. Finally, the results show a distinct pattern of frequency and mode shape variations for every damage scenario, which helps to identify the damage type, severity, and location along the bridge. The analysis results reported in this study serve as a reference benchmark for the Szapáry Bridge health monitoring.

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Finite-Element Modeling of Twin Steel Box-Girder Bridges for Redundancy Evaluation

Cited by 13 publications

References 11 publications

Effects of External Cross-Frames on the Ultimate Behavior of a Twin Steel Trapezoidal Box-Girder Bridge

Effects of External Cross-Frames on the Ultimate Behavior of a Twin Steel Trapezoidal Box-Girder Bridge

Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

Multi-Span Box Girder Bridge Sensitivity Analysis in Response to Damage Scenarios

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