Measuring Residual Stresses in Orthotropic Steel Decks Using the Incremental Hole-Drilling Technique

Nagy, Wim; Puymbroeck, Evy Van; Schotte, Ken; Bogaert, Philippe Van; Backer, Hans De

doi:10.1007/s40799-017-0169-2

Cited by 12 publications

(5 citation statements)

References 12 publications

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“…According to Connor et al (2012), residual stresses are probably tensile yield stresses, as is generally accepted for fillet welds. However, recent studies on residual stresses in OSD details indicate yield stresses in compression (Nagy et al, 2015). Since no general agreement exists on the matter of residual stresses in the considered detail, they are not yet integrated in these models.…”

Section: Crack Pathmentioning

confidence: 99%

Fatigue strength application of fracture mechanics to orthotropic steel decks

Nagy

Schotte

Bogaert

et al. 2016

Advances in Structural Engineering

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Modern fatigue design in civil constructions is mainly limited to the use of S-N curves and the hypothesis of Palmgren-Miner, as described in design standards and Eurocode. While using the latter, the fatigue evaluation may be conservative, since the outdated S-N curves are compared to current construction technology and weld properties. This shortcoming has a direct influence on the current design of orthotropic steel decks. To increase the understanding of the fatigue behaviour, an improved analysing tool using linear elastic fracture mechanics and extended finite element model is proposed. As a result, thickness effects are evaluated for both the longitudinal stiffener and the deck plate. These calculations indicated that increasing the thickness of the deck plate and the longitudinal stiffener increases the fatigue life of the structure. However, the thickness should be limited to maintain the advantage of a lightweighted construction.

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Section: Crack Pathmentioning

confidence: 99%

Fatigue strength application of fracture mechanics to orthotropic steel decks

Nagy

Schotte

Bogaert

et al. 2016

Advances in Structural Engineering

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Section: Introductionmentioning

confidence: 99%

“…In terms of residual stress distribution of welded structures in OBD and its effects on fatigue performances, researchers have conducted plenty of numerical and experimental investigations. On the one hand, numerous measurement methods of residual stress have been adopted, such as thermo‐mechanical modelling, 40,41 incremental blind‐hole drilling method, 42–45 digital image correlation approach, 46,47 sharp indentation testing, 48 contour method, 49 wavelength‐dependent neutron diffraction method, 50–53 and X‐ray diffraction method 54 . On the other hand, the effects of the residual stress of welded process on fatigue performances have been investigated, including welding size, 55 welding process, 56 fatigue crack propagation, 26,57–60 fatigue strength, 61 mean stress, 62 the strain energy density (SED) approach for fatigue life prediction by Ferro et al, 63 Ferro and Berto, 64 and Ferro, 65 fatigue life evaluation, 66–68 residual stress relaxation, 69–72 and cutting process 73,74 …”

Section: Introductionmentioning

confidence: 99%

Experimental study on the verification of adequate fatigue test specimen size of U‐rib‐to‐deck joints in orthotropic steel bridge decks

Yang

2022

Fatigue Fract Eng Mat Struct

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In this study, the distribution of residual stress of the substructure model and small coupon specimens in orthotropic steel bridge structures is experimentally and numerically investigated to validate adequate specimen sizes. Blindhole drilling and X-ray diffraction methods are used to capture longitudinal and transverse residual stresses and evaluate the effects of the cutting process. The maximum LRS and TRS were reduced by 16.6% and 15.6% from those that existed before cutting, verifying the proper size of small voucher specimens. The width-to-thickness ratio of 6-6.25 of small coupon specimens has proven sufficient to capture the effects of stress triaxiality induced by the residual stress. In the spirit of master S-N curves in ASME standard, the role of residual stress was represented in the fatigue process and does not be additionally taken into account when predicting the fatigue performances of welded structures using prediction methods based on the S-N curves. K E Y W O R D Sadequate specimen size, blind-hole drilling and X-ray diffraction methods, orthotropic steel bridge decks, residual stress effect, thermo-structure coupling method

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“…Ya et al [7] found a high tensile residual stress produced by welded process may exist in the large-scale specimens and would accelerate crack growth rate. Gu et al [8] and Nagy et al [9] measured the WRS at RTD joints of OSDs. The test data indicated that the WRS at the heat affect zone near welded joints was the largest and dropped rapidly away from the welded joints.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Residual Stress Distribution and Relaxation Effect at Double-Side Welded Rib-to-Deck Joints of Orthotropic Steel Decks

2022

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The welding residual stresses (WRS) will shorten the fatigue resistance of rib-to-deck (RTD) joints of orthotropic steel decks (OSDs) in bridge engineering. It is essential to obtain WRS and its distribution to accurately assess the fatigue damage of RTD joints in OSDs subjected to vehicle loads. Initial WRS will release under cyclic loading, resulting in the redistribution of WRS in steel bridges. To estimate the relaxation of initial transverse WRS, experimental investigations on WRS distribution in initial state and its relaxation law under cyclic loading were conducted of the double-side welded RTD joints using ultrasonic Non-destructive Testing. The results indicate that the initial transverse WRS at the heat affected zone of both inside and outside of decks vary from 0.50fy to 0.83fy, and transform within the range of 0.27fy~0.43fy at both inside and outside surfaces of U-ribs. WRS relaxation is prone to be activated under cyclic loading, especially at the first cycles. Afterwards, the WRS proceed with relaxation at a lower rate, remaining almost stable with more repetitions of loading.

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Measuring Residual Stresses in Orthotropic Steel Decks Using the Incremental Hole-Drilling Technique

Cited by 12 publications

References 12 publications

Fatigue strength application of fracture mechanics to orthotropic steel decks

Fatigue strength application of fracture mechanics to orthotropic steel decks

Experimental study on the verification of adequate fatigue test specimen size of U‐rib‐to‐deck joints in orthotropic steel bridge decks

Experimental Investigation on Residual Stress Distribution and Relaxation Effect at Double-Side Welded Rib-to-Deck Joints of Orthotropic Steel Decks

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