Fatigue performance of cracked rib-deck welded joint retrofitted by ICR technique

Yuanzhou, Zhiyuan; Ji, Bohai; Fu, Zhuojia; Ge, Hanbin

doi:10.1007/s13296-015-0089-x

Cited by 15 publications

(3 citation statements)

References 6 publications

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“…As fatigue cracking in OSDs has become a continuous and serious problem, related research on the mechanism of fatigue cracking and maintenance methods has been carried out constantly. At present, several maintenance methods have been developed by researchers to repair fatigue cracks in OSDs, for instance, cold reinforcement [6,7], drilling stop-holes [8,9], weld repair [10,11], and impact crack closure retrofit [12][13][14]. Cold reinforcement is used to bond or bolt steel or fiber reinforced polymer (FPR) plates to cracked zones to bear loads together, thereby reducing the stress distribution and hindering crack propagation.…”

Section: Introductionmentioning

confidence: 99%

The Maintenance Effect of Diaphragm-to-Rib Fatigue Cracks in Orthotropic Steel Deck via Steel Plate Reinforcement

Dai,

Zhang,

Meng

et al. 2023

Applied Sciences

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To investigate the maintenance effect of diaphragm-to-rib fatigue cracks via steel plate reinforcement, finite element models of different-shaped steel plates were established. Stress intensity factors at the crack tip before and after reinforcement were obtained, and the variations in stresses were studied. Polygonal steel plate reinforcements were then carried out on a real bridge based on the finite element calculation results. The changes in stress amplitudes and fatigue damage degrees at the crack tip were analyzed via the rain-flow counting method and Miner’s linear damage accumulating theory. The results show that both the polygonal steel plate and the rectangular steel plate could effectively eliminate the stress concentration and restrain the propagation of cracks. The stresses in other parts of the arc notch increased after reinforcement and polygonal steel plates had less influence. After the reinforcement in a real bridge, the cycle number of high stress amplitudes at the crack tip decreased significantly. The fatigue damage degree of the repaired part reduced by 70.1%, which verified the maintenance effect via polygonal steel plate reinforcement on diaphragm-to-rib fatigue cracks.

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Section: Introductionmentioning

confidence: 99%

The Maintenance Effect of Diaphragm-to-Rib Fatigue Cracks in Orthotropic Steel Deck via Steel Plate Reinforcement

Dai,

Zhang,

Meng

et al. 2023

Applied Sciences

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“…However, OSDs have suffered from fatiguecracking problems at some typical welded joints under repeating traffic loading. During the past decades, fatigue cracking in OSDs has been reported frequently around the world [3][4][5][6]. Among the fatigue phenomena observed in OSDs, the fatigue cracks at rib-to-diaphragm welded joints are the most common ones, as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Performance of CFRP‐Strengthened Rib‐to‐Diaphragm Welded Details of Orthotropic Steel Decks: Experimental and Numerical Evaluation

Song

Jiang

Wang

et al. 2022

Advances in Civil Engineering

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Rib-to-diaphragm welded details of orthotropic steel decks (OSDs) are susceptible to fatigue cracking. To deal with such cracking problem, a strengthening method using externally bonded carbon fiber-reinforced polymer (CFRP) plates was investigated by fatigue experiment and numerical evaluation. A full-scale OSD specimen with two ribs and two diaphragms was tested to evaluate fatigue cracking behavior, as well as the stress before and after strengthening. An experimentally validated numerical model was established to confirm the optimal opportunity for CFRP strengthening. The influence of different CFRP strengthening measures were then discussed on the stress intensity factors at crack tips. It was shown that bonding of CFRP plates can significantly reduce stress of rib-to-diaphragm welded details. The best opportunity for CFRP strengthening is selected as the length of crack reaches at 25.00 mm where the amplitude of stress intensity factor is the smallest. The attachment of CFRP plates by bonding on the surface of cracked plates can reduce stress response at cracked region by more than 30%. The length of crack is of no flat growth until the total number of loading cycle after strengthening arrived at 0.8 million. Results of SIFs calculated by numerical model dropes after strengthening with reduction rate more than 35% and 18% at two crack tips and crack midpoint, respectively. Compared to the geometric dimensions of CFRP, the elastic modulus of CFRP and glue layer shows more significant influence on the fatigue performance of Rib-to-diaphragm welded details due to their stronger restraint to the propagation of crack peaks. This study provided a technical reference to the design and actual application of CFRP in the strengthening of welded details in OSDs.

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“…Alternative wearing courses solutions to the classic asphalt layer have been also proposed by Medani (2006). Other retrofitting techniques focus on delaying the crack propagation by acting directly at the welded areas, such as Impact Crack-closure Retrofit (ICT), by inducing compressive residual stresses introduced by plastic deformation through high-speed impact (Yamada et al 2015, Zhiyuan et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Assessment of Full-Scale Retrofitted Orthotropic Bridge Decks

2017

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Full-scale fatigue tests were performed on two retrofitted orthotropic bridge decks (OBD). 12The retrofitting systems consist of adding a second steel plate on the top of the existing deck. The aim is 13 to reduce the stresses at the fatigue sensitive details and therefore extend the fatigue life of the OBD by 14 stiffening the existing deck plate. Two retrofitting systems have been studied. The bonded system 15 consists in bonding a second steel plate to the existing deck by vacuum infusing a thin adhesive layer (2 16 mm) between the two steel plates. The sandwich system consists in bonding the second steel plate 17 through a thick polyurethane core (15 mm). The aim of the study was to assess the fatigue performance 18 of both retrofitting. No fatigue damage was detected in the retrofitting layers during fatigue tests after 3 19 million cycles of wheel load. The stresses close to the deck-plate-to-stiffener welds reduce by at least 20 55% when using the bonded steel plates system and 45% when using the sandwich steel plates system. 21Both systems proved to have sufficient fatigue life to withstand traffic wheel loads running on 22 orthotropic bridge decks and help extending the fatigue life of the existing OBD. 23 24

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Fatigue performance of cracked rib-deck welded joint retrofitted by ICR technique

Cited by 15 publications

References 6 publications

The Maintenance Effect of Diaphragm-to-Rib Fatigue Cracks in Orthotropic Steel Deck via Steel Plate Reinforcement

The Maintenance Effect of Diaphragm-to-Rib Fatigue Cracks in Orthotropic Steel Deck via Steel Plate Reinforcement

Fatigue Performance of CFRP‐Strengthened Rib‐to‐Diaphragm Welded Details of Orthotropic Steel Decks: Experimental and Numerical Evaluation

Fatigue Assessment of Full-Scale Retrofitted Orthotropic Bridge Decks

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