Fatigue Reliability Analysis of Rib-To-Deck Joints Using Test Data and In-Situ Measurements

Zheng, Ke; Feng, Xiaoyang; Heng, Junlin; Zhu, Jin

doi:10.3390/app9224820

Cited by 14 publications

(6 citation statements)

References 27 publications

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“…The result suggests that the influence of artificial flaws on the fatigue strength is almost negligible when their depth is below 1 mm. Zheng et al (2019a) performed a series of studies on the coupling mechanism of corrosion fatigue in weathering steels, as shown in Fig. 9.…”

Section: Development Of Weathering Steelsmentioning

confidence: 99%

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Review of annual progress of bridge engineering in 2019

Zhao

Yuan

Wei

et al. 2020

ABEN

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Bridge construction is one of the cores of traffic infrastructure construction. To better develop relevant bridge science, this paper introduces the main research progress in China and abroad in 2019 from 13 aspects, including concrete bridges and the high-performance materials, the latest research on steel-concrete composite girders, advances in box girder and cable-supported bridge analysis theories, advance in steel bridges, the theory of bridge evaluation and reinforcement, bridge model tests and new testing techniques, steel bridge fatigue, wind resistance of bridges, vehicle-bridge interactions, progress in seismic design of bridges, bridge hydrodynamics, bridge informatization and intelligent bridge and prefabricated concrete bridge structures.

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Section: Development Of Weathering Steelsmentioning

confidence: 99%

“…13. A series of studies (Heng et al 2020;Zheng et al 2019a;Heng et al 2017) have been carried out on the OSD with TEUs, as shown in Fig. 14. The result shows that the application of TEUs can improve the fatigue life of OSDs.…”

Section: Thickened Edge U-ribsmentioning

confidence: 99%

Review of annual progress of bridge engineering in 2019

Zhao

Yuan

Wei

et al. 2020

ABEN

Self Cite

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“…Li et al studied the influence of permeability on the fatigue properties of single-sided rib-todeck welded joints using the structural stress method, and the results showed that welded penetration had different effects on different fatigue failure modes [12]. Zheng et al improved the fatigue performance of single-sided rib-to-deck welded joints by changing the thickness of U-ribs [13]. Through finite element analysis, Ya et al found that in a largerib-deck model, increasing the thickness of the deck and improving the rigidity of the Scholars have tried to improve the fatigue performance of rib-to-deck welded joints through methods such as grinding, ultrasonic impact, and shot-peening, which improve the shapes of weld seams and reduce residual welding stresses.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Tests and Failure Mechanism of Rib-to-Deck Welded Joints in Steel Bridge

Fan¹,

Wang³

et al. 2023

Sustainability

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The fatigue cracks of rib-to-deck welded joints in an orthotropic steel deck are one of the critical conundrums that restrict the sustainable development of steel bridges. Double-sided welded joints were achieved by introducing internal welding technology to overcome the initial “crack-like” manufacturing defects at the welding roots of single-sided welded joints. Through the observation of the macro-section of the welded joint, the differences between single-sided welding, partial-penetration welding, and full-penetration welding in rib-to-deck welded joints are compared. Relying on the Shenzhen–Zhongshan link, the fatigue failure and mechanism of single-sided rib-to-deck welded joints are clarified by the nominal stress and structural stress methods, and those of double-sided welded joints were determined through fatigue tests. The fatigue strength of rib-to-deck welded joints is higher than the FAT90 of Chinese standard and the FAT C joints of American standard. The fatigue strength of double-sided rib-to-deck welded joints is significantly higher than that of single-sided welded joints. The fatigue strength of rib-to-deck welded joints is within a ± 2σ range of main S-N curves by the structural stress method. It is suggested to adopt the double-sided welded joints in practice, and to ensure that the penetration rate is beyond 80%. The trial data are limited, and further tests are needed to confirm the results.

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“…The effectiveness of fatigue retrofits of diaphragm cutouts is often determined by the maximum concentration stress [23][24][25]. The cycling stresses and the magnitudes of stress amplitude lead to fatigue failure [26][27][28][29], which is also reflected in the "safe life" design [30][31][32]. It has been incorporated in the AASHTO LRFD code (AASHTO 2017), Eurocode 3 ("Design of steel structures"), and other specifications, where the S-N curve and similar algorithm of diaphragm cutouts are given based on nominal stress or hot spot stress [33,34].…”

Section: Introductionmentioning

confidence: 99%

Retrofit Fatigue Cracked Diaphragm Cutouts Using Improved Geometry in Orthotropic Steel Decks

Chen

et al. 2020

Applied Sciences

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Diaphragm cutouts are set to release redundant constraints and hence reduce weld fatigue at the connection of U-ribs to diaphragms in orthotropic steel decks. However, most fatigue cracks which originate from the edge of cutouts are in fact detected in the diaphragms. Therefore, a retrofit technology on cracked cutouts at the diaphragm is proposed and applied to the orthotropic steel box girder of a suspension bridge. Firstly, the stress concentration on the cutout is analyzed through refined finite element analyses. Furthermore, the fatigue cracked cutouts are retrofitted by changing their geometrical parameters. Thereafter, an optimized geometry and the size of diaphragm cutouts were confirmed and applied in the rehabilitation of a suspension bridge. On-site wheel load tests were carried out before and after retrofitting of the diaphragm cutout. The stress distributions along the edges of the cutouts and at the side of a diaphragm were measured under a moving vehicle. The stress spectra at two critical locations on the edge of a cutout was obtained under longitudinally and laterally moving vehicles. Finally, the fatigue life of the cutouts is assessed by the modified nominal stress method. The analytical and test results indicate that the wheel loads on the deck transmit stress to the diaphragms through the U-ribs, during the load transmission process, the stress flow is obstructed by diaphragm cutouts, resulting in local stress concentrations around the cutouts. In addition, the overall size of the cutouts should be small, but the radius of the transition arc should be large, thus the stress flow will not be obviously obstructed. After the retrofitting of the cutouts by improved geometry, the maximum stress decreases by 87.6 MPa, which is about 40% of the original stress. The equivalent constant amplitude stress is reduced by 55.2% when the lateral position of the wheel loads is taken into consideration. Based on the stresses obtained by finite element analysis (FEA) and experimental tests, the fatigue lives of the original cutouts are 1.7 and 4.9 years, respectively, which increase to 78.1 and 155.5 years, respectively, after the cutouts were retrofitted, which indicates that the improved geometry and retrofit technology can enhance the fatigue performance and extend the fatigue life of diaphragm cutouts with fatigue cracks.

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Fatigue Reliability Analysis of Rib-To-Deck Joints Using Test Data and In-Situ Measurements

Cited by 14 publications

References 27 publications

Review of annual progress of bridge engineering in 2019

Review of annual progress of bridge engineering in 2019

Fatigue Tests and Failure Mechanism of Rib-to-Deck Welded Joints in Steel Bridge

Retrofit Fatigue Cracked Diaphragm Cutouts Using Improved Geometry in Orthotropic Steel Decks

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