Design for movements in bridges

Sørensen, Ove; Bloomstine, Matthew L.; Bitsch, Niels; Linneberg, Poul

doi:10.2749/222137807796119492

Cited by 10 publications

(6 citation statements)

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“…According to previous investigations, fatigue of expansion joints largely depends on its cumulative displacement, which is defined as the total displacement experienced by the expansion joints in a given period. Cumulative displacement in Great Belt East Bridge is largely reduced with installation of a damper system . After installation of the viscous damper system in Jiangyin Bridge in 2007, significant decrease of cumulative displacement and amplitude of girder displacement was observed…”

Section: Case 2: Damage Of Expansion Jointsmentioning

confidence: 99%

“…According to previous investigations, [42,43] fatigue of expansion joints largely depends on its cumulative displacement, which is defined as the total displacement experienced by the expansion joints in a given period. Cumulative displacement in Great Belt East Bridge is largely reduced with installation of a damper system.…”

Section: Assessment Of Expansion Joint Condition With Shm Datamentioning

confidence: 99%

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Utilization of structural health monitoring in long-span bridges: Case studies

Sun

Zou

Zhang

2017

Struct. Control Health Monit.

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Summary Structural health monitoring (SHM) of bridges has gained rapid development in the past few years. This paper describes application of SHM on long‐span bridges in China, with the aim to illustrate its practical value. A short review of its development and practice is firstly introduced. Three case studies are subsequently presented on utilization of SHM data in engineering practice. In the first case study, a ship collision incident is analyzed using SHM data. An alarm is sent and confirmed when the collision occurred, and mode parameters are identified with GPS measurements to evaluate the bridge condition. In the second case study, damage of expansion joints in a suspension bridge is assessed with girder end displacement measurements. Malfunction of viscous damper is found to correlate with cumulative displacement. The results show that cumulative displacement can be used for condition assessment of expansion joints. In the third case study, the performance of tuned mass dampers is evaluated with wind and vibration measurements before and after tuned mass damper installation. Through explanation of these case studies, the paper illustrates how to distill useful insights from SHM data, which could be instructive for further research in this field.

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Section: Case 2: Damage Of Expansion Jointsmentioning

confidence: 99%

Section: Assessment Of Expansion Joint Condition With Shm Datamentioning

confidence: 99%

Utilization of structural health monitoring in long-span bridges: Case studies

Sun

Zou

Zhang

2017

Struct. Control Health Monit.

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“…Thus, more attention should be paid to their maintenance and rehabilitation. Besides, a main cable's damage has always been associated with corrosion and the damage of hangers has always been associated with corrosion or vibrations such as buffeting, galloping and rain vibration or a combination of these [20].…”

Section: Damage Of Main Cables and Hangersmentioning

confidence: 99%

“…This may accelerate the wear and damage of expansion joints and cause both economic and social problems in maintenance and rehabilitation during the operation service time. Sørensen concluded that during the operation service life [20], compared with other maintenance, rehabilitation and replacement cost, the cost for movement elements such as expansion joints is usually a major expense.…”

Section: Damage Of Expansion Jointsmentioning

confidence: 99%

Life-Cycle Cost Based Maintenance and Rehabilitation Strategies for Cable Supported Bridges

Cs¹,

Zhai²,

Ht³

et al. 2015

Volume 11 Number 3

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ABSTRACT:Initial cost was mainly considered in constructing a bridge in the past, whereas future payments such as the cost of strengthening or rehabilitation were neglected. This situation has brought numerous economic as well as social problems due to the lack of rational maintenance and rehabilitation strategies. Thus, it is necessary and urgent to develop appropriate bridge maintenance and rehabilitation strategies that not only meet serviceability criteria but also consider the life-cycle cost (LCC) optimization. This paper discusses major hazards of in-service cable supported bridges, including fatigue cracking of orthotropic steel decks, deterioration of cables, damage of main cables, hangers and expansion joints et al. Advanced maintenance and rehabilitation tools are introduced to save the life-cycle cost, acoustic emission monitoring technique and cold retrofit technique are detailed studied. A framework is provided for the strategies of maintenance and rehabilitation based on life-cycle cost. The framework takes into account of the safety, serviceability and sustainability during the lifetime of cable supported bridges.

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“…In addition, the LCC may be used as the decision parameter based for choice of inspection and maintenance strategy of selected elements and components, [9] and [10]. An example could for instance the case where the service life of a cable system or road surfacing is near its end, and it should be decided whether it should be replaced or should be further maintained.…”

Section: Operation and Maintenance Budgets -Another Perspectivementioning

confidence: 99%

Life Cycle Costs - Any Use?

Jensen¹

2014

IABSE Reports

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Jakob Laigaard, born 1961, received his civil engineering degree and Ph.D. from Aalborg University, Denmark Later he also received a Bachelor in Business Administration. He works for COWI but has previously also worked for the contractor Fugro Structural Monitoring and railway infrastructure manager Railnet Denmark His main areas of work is operation and maintenance of large bridges and development of railway Summary Nowadays, life cycle costs assessment is frequently carried out for all major bridge and tunnels at some stage of their service life based on net present values, an interest rate and data regarding construction costs and operation and maintenance costs. This is considered as part of an overall assessment in parallel with other important issues such as risk assessment, environmental assessment, traffic impact assessment and so forth.Such assessment may be carried out as part of feasibility studies to find the most cost-efficient solution, as part of detailed design to determine an in-service budget for the owner, as part of the tender to evaluate the most attractive bid proposal, or as part of the operation to evaluate the optimum operation and maintenance strategy.The paper looks into such applications of life cycle assessment and considers the strength and weaknesses in each application together assumptions, which should be used as basis for carrying out such an assessment. Particular, it is well know that the operation and maintenance scenario for a service life may turn out very differently from expected. It will depend on construction deficiencies, operation and maintenance organization as well as the chosen inspection and maintenance strategy. These aspects should be taken into account, when providing a life cycle cost assessment.Similarly, it is also clear that the applied unit prices and quantities for operation, inspection and maintenance may be associated with significant uncertain as well as bias. Natural this leads to the question on how detailed life cycle assessment should be carried out when considering the inherent uncertainties. Throughout this principle discussion, a number of examples are given for a number of major bridges and tunnels to illustrate the opportunities but also the limitations of life cycle assessment.

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Design for movements in bridges

Cited by 10 publications

References 0 publications

Utilization of structural health monitoring in long-span bridges: Case studies

Utilization of structural health monitoring in long-span bridges: Case studies

Life-Cycle Cost Based Maintenance and Rehabilitation Strategies for Cable Supported Bridges

Life Cycle Costs - Any Use?

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