| 1. |
- Agredo Chavez, Angelica Maria, et al.
(författare)
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Structural model updating of an existing concrete bridge based on load testing and monitoring data
- 2023
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Ingår i: Life-Cycle of Structures and Infrastructure Systems. - : Taylor & Francis Group. - 9781003323020 ; , s. 3999-4006
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The backbone of European infrastructure was built after the end of the second World War and has reached, or is near to, the end of its nominal design life. This issue urges the development of structural assessment procedures that can provide infrastructure managers the information to make decisions for repairing, upgrading, or replacement. In this paper, a methodology based on load testing and Structural Health Monitoring (SHM) for the assessment of a 65- year-old prestressed concrete bridge located in Northern Sweden is presented. The retrieved data is used to develop and calibrate structural models with different levels of data completeness. The SHM procedure includes the evaluation of material properties by diagnostics, definition of the layout and installation of the instrumentation, test execution, and data analysis. A preliminary structural model is developed based only on the original design parameters, and it is sequentially updated with monitoring data retrieved during a performed proof loading test of the bridge.
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| 2. |
- Sarmiento, S., et al.
(författare)
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Redundancy, importance, and robustness analyses for damage scenarios of bridges
- 2023
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Ingår i: Life-Cycle of Structures and Infrastructure Systems - Proceedings of the 8th International Symposium on Life-Cycle Civil Engineering, IALCCE 2023. - 9781003323020 ; , s. 3904-3912
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Konferensbidrag (refereegranskat)abstract
- Bridges are an important part of the traffic infrastructure, which are subjected to high safety requirements and economic consequences in case of functionality failure. Therefore, it is needed to consider potentially substantial direct and indirect risks during service life, i.e., the need for risk and robustness analyses. Over the last decades, various quantitative performance criteria have been developed but their interrelation and compatibility has hardly been systematically studied. This paper contains a proposal of a novel and complementary formulation of interrelations between reliability- and risk-based robustness, importance, and redundancy indicators. The classification, derivation, and exemplification of the interrelations between these indicators are presented and formulated for two case studies of a pre-stressed concrete bridge considering different hazard scenarios namely overloading and chloride attack. The analyses and applications lead to the identification of interrelations between the reliability based robustness, redundancy and importance indicator indicators and with the risk based robustness indicator.
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