Ultimate Flexural Capacity of a Severely Damaged Reinforced Concrete T-Girder Bridge

Li, Yong; Zhang, Jinquan; Chen, Yanjiang; Wu, Lipeng

doi:10.1061/(asce)be.1943-5592.0001027

Cited by 14 publications

(7 citation statements)

References 9 publications

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“…Although the beamline method is very efficient, it is argued to be too conservative and may result in lower bridge ratings and improper permit checking (Wood et al, 2007). It is widely accepted that the finite element analysis method, although being more time-consuming, can be more accurate in predicting the flexural behavior of bridges (Ding et al, 2012; Li et al, 2017; Yousif and Hindi, 2007). In order to investigate the optimal transverse position and quantify the differences between different loading cases, the finite element analysis method was therefore adopted in this study.…”

Section: Analysis Methodsmentioning

confidence: 99%

Optimal transverse position for overweight trucks to cross simply supported multi-girder bridges

Yan

Deng

2017

Advances in Structural Engineering

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Recent years has witnessed a steady increase in the issued overweight vehicle permits. Damage and deterioration of bridges caused by overweight vehicles have received increasing attention. Most previous studies on overweight vehicles have focused on the routing and weight regulation of overweight trucks while little attention has been paid to the determination of the optimal transverse position for overweight trucks to cross highway bridges. This article aims to investigate the optimal transverse position for overweight trucks to cross the simply supported multi-girder bridges and provide suggestions for the management of overweight vehicles. Finite element analysis is performed for a group of prefabricated concrete bridges commonly used in China under the action of overweight trucks with varying transverse positions, and the optimal transverse position is determined based on the maximum bending stress of the girders. The effects of a few important factors, including the superstructure configuration, length of bridge spans, number of girders, type of girder connections, and support conditions, on the optimal transverse truck position are also investigated. The findings in this article highlight the importance of the transverse position of overweight trucks when crossing multi-girder bridges.

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Section: Analysis Methodsmentioning

confidence: 99%

Optimal transverse position for overweight trucks to cross simply supported multi-girder bridges

Yan

Deng

2017

Advances in Structural Engineering

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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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“…26 The aging problems of old bridges designed based on early specifications result in a higher stress level under the increased traffic load. [27][28][29] According to the fatigue test results on full-scale reinforced concrete girders by Zhang et al, 30 increasing the overload ratios from 25% to 60% can lead to severe deterioration of the fatigue life (decreasing from 670,000 to 350,000 cycles). Deng et al 31 established a fatigue analysis procedure of the bridge system using the OpenSEES framework.…”

Section: Introductionmentioning

confidence: 99%

Fatigue performance of prefabricated composite T‐beams under cyclic overloading: An experimental study

Xie,

Zhang,

et al. 2023

Structural Concrete

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Existing studies have proved that interfaces between the prefabricated layer and the cast‐in‐place layer significantly affect the static performance of prefabricated concrete structures using the wet connection method, but little has been known about the fatigue performance, especially at high load levels. This study investigated the fatigue behavior of prefabricated composite concrete beams under negative bending moment induced by the high‐stress level cyclic load. Fifteen composite T‐beams with three different designed sections were tested. The failure mode, cracking and deflection behavior, steel strain development, and the new‐old concrete interfacial deformation were recorded and analyzed. It was found that the stress redistribution occurred with the debonding cracks generated at the new‐old concrete interface, causing the degradation of the static and fatigue performance. Setting interfacial shear keys could prevent such debonding failure at static and low cyclic loading levels. Meanwhile, the corresponding mechanisms were verified through cross‐sectional analysis.

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Ultimate Flexural Capacity of a Severely Damaged Reinforced Concrete T-Girder Bridge

Cited by 14 publications

References 9 publications

Optimal transverse position for overweight trucks to cross simply supported multi-girder bridges

Optimal transverse position for overweight trucks to cross simply supported multi-girder bridges

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

Fatigue performance of prefabricated composite T‐beams under cyclic overloading: An experimental study

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