Fatigue life assessment of large scale T-jointed steel truss bridge components

Cai, Shunyao; Chen, Weizhen; Kashani, Mohammad M.; Vardanega, Paul J.; Taylor, Colin Anthony

doi:10.1016/j.jcsr.2017.01.008

Cited by 21 publications

(5 citation statements)

References 23 publications

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“…There might be a size effect in this proposed structure. In this case, the test results evaluated by ENSA are more in line with the results from Cai et al (2017) and Park and Miki (2008), presenting an S-N curve for both investigated welded joints generally beyond the FAT300. 4.…”

Section: Resultssupporting

confidence: 81%

Full-scale fatigue tests on a novel box-shaped steel rod of a spatial arch bridge for fatigue assessment

Cai

Chen

2017

Advances in Structural Engineering

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A novel leaning-type spatial arch bridge without thrust was designed as a landmark in a major urban city. In order to alleviate the higher negative reaction force at side span and enhance the lateral stability, commonly the case within this type bridge, a large-size replaceable box-shaped steel rod with pinned connections was introduced. The fatigue behaviour of the box-shaped steel rod and related upper and lower anchorage segments was investigated through a full-scale constant-amplitude fatigue test under axial loading. In comparison to the fatigue test results, the fatigue evaluation based on Eurocode 3 nominal stress design curve FAT56 considerably overestimated the fatigue strength of critical welded detail in box-shaped steel rod, which was underrated according to the universal International Institute of Welding effective notch stress design curve FAT225. The presented full-scale programme also validated the applicability of the latter method, which presented conservative results, to large-size thick-plate (80 mm) welded joints. The conclusion based on the test and theoretical results may provide a reference for the fatigue design of adopting box-shaped steel rod in spatial arch bridges.

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Section: Resultssupporting

confidence: 81%

Full-scale fatigue tests on a novel box-shaped steel rod of a spatial arch bridge for fatigue assessment

Cai

Chen

2017

Advances in Structural Engineering

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“…The results were calculated by the local notch stress method and compared with the previous fatigue tests in the literature. In 2017, Cai et al [8] studied the applicability of the effective notch stress method on large-scale T-joints of truss bridges through numerical analysis. The results show that the effective notch stress method provides a conservative estimate of fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge

Liu

Chen

et al. 2022

Metals

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The K-type joint, which consists of the web members and the chord members with varied angles welded together, has been widely adopted in long-span steel truss bridges. However, its fatigue performance has been rarely considered, despite its critical role in bridge structural safety and durability. Accordingly, the FE model of the K-type joint was established in Abaqus and the fatigue performance analysis was conducted, in which the effect of web/chord thickness ratio (τ), chord/web angle (θ), and chord with rib stiffener were investigated. Take the Mingzhu Bay steel truss arch bridge as an engineering background, the hot spot stress method was employed to calculate the fatigue performance of three K-type joints in unfavorable locations. Furthermore, a 3D full-scall bridge model was built to evaluate the fatigue performance of the K-type joints under standard and overloaded moving vehicle load scenarios. The results show that the max hot spot stress factor (SCFmax) of the web and chord member is influenced by τ and θ. The chord members added stiffener is founded to be an effective way to enhance fatigue performance. The fatigue stress intensities of the three unfavorable locations meet the Eurocode 3 specification requirements, but the one in the mid-truss arch is not satisfied under an overloaded vehicle loading rate of 25%.

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“…The majority of those bridges are operational today, but their safety is questioned since they have reached the end of their design life and in many cases, they are not well maintained. Durability issues related with corrosion and fatigue are also very common in bridges [1,2]. Consequently, many EU countries must invest in rehabilitation projects to ensure serviceability and safety.…”

Section: Introductionmentioning

confidence: 99%

Finite element modelling of push-out tests for novel locking nut shear connectors

et al. 2021

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Fatigue life assessment of large scale T-jointed steel truss bridge components

Cited by 21 publications

References 23 publications

Full-scale fatigue tests on a novel box-shaped steel rod of a spatial arch bridge for fatigue assessment

Full-scale fatigue tests on a novel box-shaped steel rod of a spatial arch bridge for fatigue assessment

Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge

Finite element modelling of push-out tests for novel locking nut shear connectors

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