Risikobewertung und Schutz von baulichen Infrastrukturen bei Hochwassergefahr

Risk assessment and protection of the built infrastructure for flood events

The increase in number, intensity and damage of extreme natural events is a growing threat to public security and for the built infrastructure. The following article explains the risk management with respect to flood.
In the context of national and international research projects, the authors develop practical engineering-tools for a fast determination of the vulnerability of the built infrastructure, like public buildings and transport infrastructures, in order to derive risk assessments in disaster events and to provide decision support for rescue forces. The engineering-tools include, among other things, a decision-support-system with recommendations for strengthening and repairing of structures in the case of major flooding. Structures are evaluated with rapid analysis, but also with detailed numerical calculation. The research projects are interdisciplinary joint-research-projects and the authors are working at different aspects for the assessment of the built infrastructure.
For the effects on built infrastructure during flood and for prevention of disaster events, there is no standardization at hand. There are just a few guidelines for the protection of structures for a flood event. For this reason load models for static and dynamic loads during a flood are developed, in order to create a basis for the assessment of robustness of structures. The determination of the remaining carrying capacity during and after a flood event is in the primary focus. This is the basis for the analysis of the resilience of the built infrastructure.
In this article the implementation of the classical action strategy in disaster management (pre-, during-, post-incident) in a software-tool is presented and with that, innovative methods with geo-information-systems (GIS) and 3D-city- and building models (BIM) are shown.