Analysis on safety risks during operation of Chinese highway bridges

Li, W; Zhao, Jincheng; Feng, Minyan; Li, X

doi:10.1201/b17063-279

Cited by 4 publications

(5 citation statements)

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“…Non-structural cracks [4], which are frequent in most concrete bridges, especially in girder bridges, are often caused by temperature variations. Temperature cracks can be further classified as uniform temperature difference cracks, internal and external temperature difference cracks, and upper and lower temperature difference cracks, based on the temperature field, temperature deformation, and temperature stress of the concrete structure.…”

Section: Temperaturementioning

confidence: 99%

“…Long-term deformation will reduce the performance of the pavement materials and pose a risk of crack diseases. For girder bridges, long-term exposure to high-intensity loads can generate structural cracks [4] (load-induced cracks). There are generally two forms of cracks depending on their location: vertical cracks occurring in areas subjected to large bending moments are called flexural cracks, and diagonal cracks occurring on both sides of the web plate due to shear or combined shear and bending moments are called shear cracks.…”

Section: Structural Overloadmentioning

confidence: 99%

“…Similarly, Weifurong's work on "Discussion of Common Diseases and Crack Treatment Techniques in Continuous Rigid Bridges" [2] focuses only on rigid bridges. Additionally, Wu Penglai and Li Peng have analyzed and summarized cracks in masonry arch bridges [3] and girder bridges [4], respectively, but their studies are limited to specific types of bridges. Considering the current research status in China, there is still a lack of comprehensive summaries on the causes and preventive maintenance measures for bridge cracks.…”

Section: Introductionmentioning

confidence: 99%

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Causes and treatment of bridge cracks

Zhang

2024

ACE

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With the large-scale construction and operation of highway bridges in China, the maintenance and repair work of bridges has become increasingly important. The treatment of bridge cracks is a crucial aspect of maintenance and repair. Improper analysis and treatment of cracks in maintenance and repair projects can pose significant safety hazards to bridges. Therefore, it is necessary to conduct a detailed scientific analysis of the cracks in bridges and implement corresponding treatment measures. This paper summarizes common crack diseases in different bridge operation processes, analyzes their causes, and provides relevant references for later maintenance and repair, which has certain reference significance for the maintenance and repair of bridges.

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Section: Temperaturementioning

confidence: 99%

Section: Structural Overloadmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Causes and treatment of bridge cracks

Zhang

2024

ACE

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“…However, researchers discovered that the FSO of several overturned multi-span bridges exceeds one when based on a rigid overturning axis, indicating its unsuitability for multi-span bridges [9]. Li [25] proposed a modified overturning axis for the FSO considering the effects of deformed body rotation and rigid body rotation. The updated FSO method takes the line of the outermost bearing of each support section as the overturning axis (fold overturning axis), which has been integrated into the MTPRC2018 code [26].…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis for Overall Overturning of Concrete Single-Column Pier Bridges Induced by Temperature and Overloaded Vehicles

Wang,

Zhou,

Xue

et al. 2024

Materials

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Several overloaded-induced overturning incidents of girder bridges with single-column piers have occurred in recent years, resulting in significant casualties and economic losses. Temperature, in addition to overloading, may also play a role in exacerbating bridge overturning. To investigate the association between temperature and bridge overturning, an explicit finite element model (EFEM) of a three-span concrete curved continuous bridge considering nonlinearities was developed to simulate overall collapse. The effects of uniform and gradient temperatures on the overall overturning stability of curved and straight bridges were evaluated based on the EFEMs. Furthermore, the temperature–bridge coupling model and temperature–vehicle–bridge coupling model were utilized to examine how gradient temperature influences bridge overturning. The results show that the overall overturning collapse of a bridge follows four stages: stabilization, transition, risk and overturning. Variations in uniform temperature from −30 °C to 60 °C had a negligible effect on the ultimate vehicle weight for bridge overturning, with a variation of less than 1%. As the gradient temperature ranged from −30 °C to 60 °C, curved bridges show less than a 2% variation in ultimate vehicle weights, compared to a range of −6.1% to 11.7% for straight bridges. The torsion caused by positive gradient temperature in curved bridges can exacerbate bridge overturning, while negative gradient temperature in straight bridges can lead the girder to ‘upward warping’, facilitating girder separation from bearings. Monitoring the girder rotation angle and vertical reaction force of bearings can serve as important indicators for comparing the stability of bridges.

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“…The degradation mechanism and manifestation of the same kind of bridge have a certain regularity, and finding this rule is helpful for preventing maintenance of such bridges [3,15,16]. It is necessary to adopt a scientific and reasonable analysis method to find out the cause of collapse, since avoiding similar bridge collapse accidents has become an important issue in modern engineering research [17].…”

Section: Introductionmentioning

confidence: 99%

Management Path of Concrete Beam Bridge in China from the Perspective of Sustainable Development

Liu

et al. 2020

Sustainability

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More and more bridges have entered the maintenance stage, which has potential collapse hazards and threatens life and property safety. More attention has been paid to the improvement of maintenance management levels during the operation period in terms of extending the service life of the bridge, but less attention has been paid to it from the perspective of the whole life cycle. One hundred and ninety examples of concrete beam bridges in China were collected, based on which the collapse characteristics and collapse causes of concrete beam bridges were analyzed. The causes of bridge collapse come from all stages of bridge life cycle, including environmental factors and human factors. Moreover, the effects of the previous phase carry over to the next. Superficially, poor maintenance management during an operation led to bridge collapse. However, the root cause may have occurred at an earlier stage. On this basis, a fuzzy interpretation structure model (FISM) for concrete beam bridge deterioration is conducted. The model can decompose the complex and messy relationship among the factors of bridge collapse into a clear, multi–level and hierarchical structure. Compared with qualitative analysis, an ISM chart can directly reflect the relationship between collapse factors, which is convenient for further analysis. Poor maintenance management during operation is the direct cause, while improper planning, imperfect standards and weak supervision in the early stage are the fundamental causes. Finally, in order to improve the sustainability of concrete beam bridges scientifically, management suggestions are put forward for the participants involved in each stage of the bridge’s life cycle.

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Analysis on safety risks during operation of Chinese highway bridges

Cited by 4 publications

References 0 publications

Causes and treatment of bridge cracks

Causes and treatment of bridge cracks

Failure Analysis for Overall Overturning of Concrete Single-Column Pier Bridges Induced by Temperature and Overloaded Vehicles

Management Path of Concrete Beam Bridge in China from the Perspective of Sustainable Development

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