A numerical study on the structural integrity of self-anchored cable-stayed suspension bridges

Lonetti, Paolo; Pascuzzo, Arturo

doi:10.3221/igf-esis.38.46

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…It can also improve the risk resistance under extreme conditions. Specifically, for arch bridges, the design of rigid piers is extremely important in multi-span continuous bridges, because it can effectively resist the unbalanced thrust caused by the collapse of one-sided arch spans and thereby prevent the continuous collapse [60][61][62]. As dynamic retrofit solutions of bridges, reasonable dynamic isolation approaches like inelastic hinges and other devices can prevent and reduce bridge failure caused by earthquakes.…”

Section: Discussion: Guideline Of Sustainable Managementmentioning

confidence: 99%

Lessons Learnt from Bridge Collapse: A View of Sustainable Management

et al. 2020

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Bridge failure is one of the worst infrastructural disasters. This paper investigates the risk of bridge infrastructures in the view of sustainable management. Statistics on bridge failures from 2009 to 2019 in China show that most of these failures are related to anthropic factors. The collapse of the Zijin Bridge on 14 June 2019 in Heyuan City of Guangdong Province, China is used as a case to perform detailed analysis. Superficially, bridge collapse is a technical problem rather than a management problem. However, the deep reason for this kind of bridge failure may be due to the lack of sustainable management. In order to verify this point of view, both fault tree analysis (FTA) and strategic environmental assessment (SEA) for the bridge failure and later impact on society are conducted. According to the FTA results, the failure of the arch foot is the direct trigger of the Zijin Bridge collapse. Since a lack of real-time monitoring, risk assessment and other management issues are potential factors causing bridge collapse, strategic environmental assessment (SEA) is used to investigate the management issues related to the economy, culture, human health and environmental sustainability in more depth. The low total SEA result shows poor project management and a high safety risk. Finally, the specific managerial measures are proposed to improve the sustainability of infrastructures.

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Section: Discussion: Guideline Of Sustainable Managementmentioning

confidence: 99%

Lessons Learnt from Bridge Collapse: A View of Sustainable Management

et al. 2020

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“…Finite element analysis of bridges, both in intact and damaged conditions, offers a reliable method for simulating the behavior of bridges and a credible alternative to costly experiments [33][34][35][36][37]. However, even with this valuable numerical tool, elaborate modeling of a bridge and detailed analysis under various loading requires significant time and efforts.…”

Section: Finite-element Analysis and Overview Of Studymentioning

confidence: 99%

Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

Abedin

Mehrabi

2020

Infrastructures

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In steel girder bridges, fracture of one girder may occur without noticeable bridge profile changes. It is critical to ensure that the bridge will have adequate capacity to prevent collapse until the next cycle of inspection discovers the damage. It is realized that once one of the bridge girders is fractured, vertical loads need to be distributed through an alternative path to the intact girder(s). In this case, cross-frames can play an important role in transferring the loads and preventing from sudden collapse. This paper investigates the impact of cross-frames on load distribution after a fracture is occurred in one girder. Bridge configurations with different cross-frame spacing were studied using finite element modeling and simulation of the bridge behavior with a fractured steel plate girder. Nonlinear and dynamic solution methods were used for these analyses. Results of this investigation demonstrated the important role cross-frames can play in providing some reserved capacity for the bridge with fractured girder to enhance the bridge redundancy. The contribution of the cross-frames and the behavior of the bridge after fracture in one girder however depends on the configuration of the bridge. A study of the variation of the effect of cross-frames with respect to the number of girders is also included in this paper.

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“…Concrete bridge structures decrease in mechanical performance over time because of damage phenomena affecting concrete material, usually induced by chemical (e.g., dangerous natural agents), mechanical (e.g., vehicle-induce vibrations, overloads), and physical (shrinkage, thermal variations) actions [1][2][3]. Unfortunately, concrete damage is a phenomenon that cannot be avoided completely.…”

Section: Introductionmentioning

confidence: 99%

A numerical model based on moving mesh FE for vehicle bridge interaction

Greco,

Lonetti,

Pascuzzo

et al. 2024

J. Phys.: Conf. Ser.

Self Cite

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The main purpose of the present study is to investigate the effects of damage phenomena on the structural behavior of Reinforced Concrete (RC) bridges and related identification procedures. To this end, an effective FE numerical model able to analyze the structural response, in presence of different damage scenarios, is implemented. Moreover, the influence of moving loads on the damage behavior is also considered by means of the vehicle-bridge interaction (VBI) FE model. The combination of the structural model and the vehicle mechanical system provides an advanced numerical model able to simulate the dynamic interaction between the bridge and the moving vehicle. This problem is managed by using the moving mesh technique. In particular, the formulation “Arbitrary Lagrangian-Eulerian” (ALE) provides an accurate description of the interaction between two systems. ALE approach is based on a fixed-referential system and moving coordinate variables, representing the positions of the computational nodes during the application of the moving loads. Vibrational analyses in terms of damage scenarios are presented to verify how the presence of material discontinuities affects the natural frequencies of the structural system. Moreover, results in terms of dynamic amplification factor for typical design bridge variables, in presence of damage phenomena and moving loads, are also developed. Finally, a discussion on the impact of the proposed results on the dynamic identification procedures is provided.

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A numerical study on the structural integrity of self-anchored cable-stayed suspension bridges

Cited by 11 publications

References 32 publications

Lessons Learnt from Bridge Collapse: A View of Sustainable Management

Lessons Learnt from Bridge Collapse: A View of Sustainable Management

Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

A numerical model based on moving mesh FE for vehicle bridge interaction

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