| 1. |
- Nasr, Amro, et al.
(författare)
-
Climate change risks and bridge design
- 2023
-
Ingår i: Adapting the Built Environment for Climate Change : Design Principles for Climate Emergencies - Design Principles for Climate Emergencies. - 9780323953368 - 9780323953375 ; , s. 109-131
-
Bokkapitel (refereegranskat)abstract
- Climate change can have substantial impacts on the safety and performance of infrastructure systems. Understanding these impacts is of paramount importance, especially for long-lived infrastructure elements, such as bridge structures. This chapter focuses on discussing the impacts of climate change to bridges and describes a conceptual framework as a guide for bridge designers on how to consider these impacts in bridge design. Several existing challenges are, however, highlighted that hinder the application of such a framework in practical contexts (e.g., climate change data availability and uncertainty). Overcoming these challenges is necessary to facilitate a rational consideration of climate change impacts in the design of bridge infrastructure. Although the current chapter mainly addresses bridges, the identified risks and proposed framework can be extended to other types of infrastructures and infrastructure elements.
|
|
| 2. |
- Nasr, Amro, et al.
(författare)
-
Risk-based multi-criteria decision analysis method for considering the effects of climate change on bridges
- 2023
-
Ingår i: Structure and Infrastructure Engineering. - : Informa UK Limited. - 1573-2479 .- 1744-8980. ; 19:10, s. 1445-1458
-
Tidskriftsartikel (refereegranskat)abstract
- Recent studies have identified many potential climate change impacts on bridges. Considering the sheer number of these potential impacts, how can a bridge owner prioritise which impacts to consider, and for which bridges? This paper proposes a risk-based multi-criteria decision analysis method for systematically addressing these two questions simultaneously. The proposed method can be used to address both extreme and non-extreme impacts as opposed to focussing solely on extreme impacts as has been done in previous prioritisation studies related to climate change risks. The proposed method is based on four main components of risk: hazard, impact, vulnerability and consequences. Several indices characterising these components are used to address the previous two questions. To reflect the uncertainty in the analysis, the different indices are assessed optimistically and pessimistically. Additionally, to ensure a more transparent decision-making process the inclusion of a strength of evidence assessment is also proposed. The applicability of the method is then demonstrated on three illustrative case studies for three different potential climate change impacts. It is concluded that the proposed method is both feasible and appropriately fulfils its purpose. Nevertheless, the proposed method should be more elaborately tested on practical bridge case studies to further establish its applicability.
|
|
| 3. |
- Robuschi, Samanta, 1991, et al.
(författare)
-
Impact of cracks on distribution of chloride-induced reinforcement corrosion
- 2023
-
Ingår i: Materials and Structures/Materiaux et Constructions. - : Springer Science and Business Media LLC. - 1359-5997. ; 56:1
-
Tidskriftsartikel (refereegranskat)abstract
- Surface crack width is regulated in codes to limit corrosion of reinforcement bars in concrete. However, the influence of surface crack width on corrosion damages is not directly inferable from previous research.In this work, data on corroded cracked concrete specimens in chloride environments was compiled. Detailed information was included, such as crack and pit locations, local corrosion pattern, etc. Five hypotheses on the influence of transversal cracks on corrosion damage were formulated, and statistical methods were used to test them on the dataset.Transversal cracks were good indicators of the position of corrosion pits. The corrosion rate of the pit increased in proximity of a crack. With time, pits grew in depth at a slower rate but increased in number. No clear correlation between surface crack width and corrosion damage was found. Results point out discrepancies in the collected data, arguing for the need of well-defined procedures for assessing crack and corrosion damage.Further, the statistical treatment allowed for identification of bias in existing data, which was used as a research planning tool to provide guidance on the design of additional experiments. Thus, recommendations for future experimental work required to reduce the bias are given.
|
|
