Restoration models of flood resilient bridges: Survey data

The purpose of this survey is to define the restoration tasks after hydraulic-induced damage and/or loss of functionality of bridges. This includes the duration and sequence of restoration tasks, idle times, cost, and traffic/functionality loss for specified damage levels of given bridge components. The potential use of this data is the generation of sets of restoration and reinstatements functions for quantifying the resilience of bridges exposed to hydraulic hazards, i.e. scour, debris accumulation and hydraulic forces (Mitoulis et al. 2021). The data are expected to inform boroughs, county councils, road and rail owners and stakeholders by providing valuable information for managing efficiently their assets prior to and after catastrophic events on the basis of resilience. The survey was based on a questionnaire answered by experts on bridge and infrastructure engineering.


Specifications
Engineering; Civil and Structural Engineering Specific subject area Survey for riverine bridges exposed to flood effects; reinstatement and restoration for different damage levels; cost ratio and idle time; functionality and capacity loss; quantification of resilience for transport infrastructure Type of data

Value of the Data
• The dataset contributes to bridging the inherent information gaps in bridge restoration after flood events and to better understand the interdependency between capacity and functionality (traffic).
• This data provides valuable information for researchers working in the area of infrastructure flood resilience, bridge owners and operators, consultants and risk assessors including the insurance sector, as well as for the advancement of existing and new regulations for climate resilience, design and management. • Information provided in this dataset can be used for validation and calibration of relevant models, and resilience quantifications of critical highway and railway bridges.

Data Description
In this data brief we provide the answers elicitated from the experts based on the questionnaire which is provided in the supplementary data files. The survey includes questions regarding the recovery of bridges experiencing different damage level based on the following: (i) duration of restoration for 23 tasks; (ii) idle time; (iii) traffic capacity of the bridge after damage; (iv) prioritisation of restoration tasks; (v) cost ratio; (vi) comments from experts. Further details are included in Mitoulis et al. [1] . Similar approaches have been deployed in Lamb et al. [2] for assessing vulnerability factors for flood critical bridges and Misra et al. [3] on recovery of bridges exposed to diverse hazards. The significance of this data is that they enable the quantification of resilience for bridges and transport networks [4][5][6] in conjunction with recent research on the vulnerability of flood critical bridges [7] .
All the answers of the experts are included in the supplementary files for spread and deep foundations experiencing minor, moderate, extensive and severe damage. Fig. 1 shows minimum, mean and maximum values of the durations of restoration tasks and standard deviation of the mean value. The same values are reported in the supplementary file, which also includes the answers for the fields (i) to (vi) described above.

Experimental Design, Materials and Methods
The experts were targeted considering their expertise and experience in bridge, geotechnical and infrastructure engineering and restoration works. The questionnaire is ongoing as it covers apart from foundations, other structural components of flood critical bridges, i.e. deck, bearings, piers, abutments and backfills. On two occasions, experts did not fill the questionnaire, however, they provided feedback verbally and this is reflected in Mitoulis et al. [1] .
For future research, the data included in this article can be used to verify and extend recovery models for transport infrastructure, and in particular, for quantifying the climate resilience of riverine highway and railway bridges.

Ethics Statement
The studies were performed in accordance with the relevant institutional and national regulations and legislation. Participants were requested to sign an informed consent form, after being informed of the aim of the survey.
Only primary data from datasets publicly available have been used for the development of the present dataset. All the relevant collaborations and funding sources have been mentioned.

Declaration of Competing Interest
The authors declare that they have no known competing financial interests or personal relationships which have or could be perceived to have influenced the work reported in this article.