Destructive testing and computer modeling of a scale prestressed concrete I-girder bridge

Murray, Cameron D.; Arancibia, Mauricio Diaz; Okumus, Pinar; Floyd, Royce W.

doi:10.1016/j.engstruct.2019.01.018

Cited by 10 publications

(5 citation statements)

References 16 publications

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“…These works demonstrated how existing PC bridges with none‐to‐slight damage or deterioration ensured satisfactory load‐bearing capacity, overperforming structural requirements by code provisions. Nonetheless, experimental tests on full‐scale specimens could be highly demanding, 18 this being the reason why reduced‐scale PC girders/decks have been commonly studied 19–22 …”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, experimental tests on full-scale specimens could be highly demanding, 18 this being the reason why reduced-scale PC girders/decks have been commonly studied. [19][20][21][22] In the last decades, numerical methods were adopted to study the response of PC structures focusing on different aspects. Based on the experimental tests on PC samples, the well-known finite elements (FEs) software package Abaqus FEA ® had shown to be able to predict not only the structural behavior at both system and sectional scale (i.e., force-displacement and moment-curvature relationships 23,24 ) but also the local response parameters (i.e., tensile cracking, release of the strands, end anchorages [25][26][27][28] ) of PC members with good accuracy.…”

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confidence: 99%

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Multidimensional nonlinear numerical simulation of post‐tensioned concrete girders with different prestressing levels

Galano,

Losanno,

Miluccio

et al. 2023

Structural Concrete

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Most of the Italian infrastructures have been built since the mid‐twentieth century. Prestressed concrete (PC) has been widely used, especially for bridges and viaducts. These structures have proved effective over time, but their performance could be affected by degradation phenomena (i.e., corrosion of the tendons and residual prestressing) or construction defects (i.e., grouting of the ducts), which need to be accurately modeled. This paper focuses on the flexural response of two reduced‐scale, posttensioned, PC bridge girders, prestressed with two different jacking forces and tested under four‐point bending configuration. Four multidimensional numerical models were developed to simulate the experimental behaviors of the selected specimens, using two alternative computational strategies, namely, the finite element method (FEM) and applied element method (AEM). Three FEM modeling were considered, ranging from one‐dimensional lumped‐plasticity models to two‐dimensional and three‐dimensional (3D) spread‐plasticity models. Besides, 3D AEM models were developed into another software package. The accuracy and the computational costs of the two numerical strategies are discussed in this paper. Also, the main features of each numerical modeling technique are addressed, including comparisons between numerical and experimental global response data as well as the statistical characterization of the model error. Based on these different features, the authors also suggest the most suitable numerical strategy for future studies on PC girders.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Multidimensional nonlinear numerical simulation of post‐tensioned concrete girders with different prestressing levels

Galano,

Losanno,

Miluccio

et al. 2023

Structural Concrete

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“…The decision was made to use steel with the same strength as the steel bars to repair the damaged main steel bars, and stirrup and concrete with the same strength as the original concrete was used to repair the concrete of the bottom plate, and at the same time, the cracks were closed and strengthened with steel plates [ 25 ]. To study the ultimate bearing capacity of the damaged girder after repair and strengthening, destructive tests were conducted on an undamaged girder and the repaired girder strengthened by steel plates [ 26 , 27 , 28 , 29 , 30 ], and the destructive process was simulated through detailed analysis [ 31 , 32 ]. The actual bearing capacity of the repaired girder strengthened by steel plates was evaluated by contrasting the data of the destructive tests and a thorough study of the two girders.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of the Ultimate Flexural Capacity of a Full-Size Damaged Prestressed Concrete Box Girder Strengthened with Bonded Steel Plates

Liu

2023

Materials

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Using steel plates attached with epoxy resin adhesive to strengthen prestressed reinforced concrete bridges has become a common method to increase bearing capacity in engineering because of the simple technology, low cost and good strengthening effects. The strengthening method of steel plates has been gradually applied to repair damaged bridges in practical engineering. After a cross-line box girder bridge was struck by a vehicle, the steel bars and concrete of a damaged girder were repaired and strengthened by steel plates, and then the ultimate bending bearing capacity was studied through a destructive test. The results of the destructive test were compared with those of an undamaged girder to verify the effect of the repair and strengthening of the damaged girder. The results showed that the actual flexural bearing capacity of the repaired girder strengthened by steel plates was 1.63 times the theoretical bearing capacity, 36.7% more than that of the damaged girder and 95.3% of that of an undamaged girder. The flexural cracking moment of the repaired girder strengthened by steel plates reached 66.3% of that of the undamaged girder. The maximum crack width decreased by 24.6%, and the maximum deflection increased by 2.7%, compared with the undamaged girder when the repaired girder strengthened by steel plates finally failed. Moreover, this method of attaching steel plates can increase the ductility of bridges and reduce the degree of cracking. Additionally, the actual safety factor of the repaired girder was greater than three, and it had a large safety reserve.

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“…At present, the actual bearing capacity is assessed mainly according to the reduction and correction of the design bearing capacity, based on the limit state method for highway bridges in China. The actual ultimate bearing capacity can be obtained by carrying out failure tests of bridges, which are about to be torn down [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental-Numerical Study on the Flexural Ultimate Capacity of Prestressed Concrete Box Girders Subjected to Collision

et al. 2022

Materials

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Precise evaluation for flexural ultimate capacity of bridges which are subjected to the collision of over-height trucks is essential for making decisions on corresponding maintenance, strengthening or replacement. When the span of a cross-line continuous bridge with a double-box girder was hit by an overly high vehicle, the concrete floor of one girder was severely damaged, and part of the prestressed strands and reinforcements in the girder were broken. After the double-box girder was removed and separated into two single box girders, the ultimate flexural capacity of both box girders was studied by destructive tests, and a comparison was made between the damaged and undamaged girders. Moreover, finite element analysis was conducted to simulate the failure process. The results show that the flexural bearing capacity of the damaged box girder decreased by 33%, but it was still 1.07 times greater than the design bearing capacity, which basically meets the design requirements. Also, the damaged box girder showed a desirable serviceable limit state for three-axle vehicles and five-axle vehicles, but showed an undesirable serviceable limit state for six-axle vehicles. This study shows that repairing or strengthening the damaged span may be better than demolishing and rebuilding the whole superstructure bridge.

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Destructive testing and computer modeling of a scale prestressed concrete I-girder bridge

Cited by 10 publications

References 16 publications

Multidimensional nonlinear numerical simulation of post‐tensioned concrete girders with different prestressing levels

Multidimensional nonlinear numerical simulation of post‐tensioned concrete girders with different prestressing levels

Experimental and Numerical Study of the Ultimate Flexural Capacity of a Full-Size Damaged Prestressed Concrete Box Girder Strengthened with Bonded Steel Plates

Experimental-Numerical Study on the Flexural Ultimate Capacity of Prestressed Concrete Box Girders Subjected to Collision

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