Impulsbelastade betongkonstruktioner

Research Project, 2018 – 2019

With the aim of making attractive land space available for further development, there is today a desire in many cities to implement a densification of the existing urban environment. However, such densification, e.g. over decking, leads to a reduced free distance between buildings and transport routes, which may lead to increased demands for exceptional accidents such as explosions. To be able to assess the effect of such risk scenarios, and to develop necessary protective measures, there is a need for a design methodology that is well adapted to this problem.

An impulse load is an intensive load pulse of short duration that can emerge at e.g. an explosion or a strong impact. Such a load can cause a structural response that is significantly different from that normally obtained at static loading. This put special demands on the design of structures subjected to impulse loading, but in Sweden there is currently a lack of sufficient instructions for this. For the Swedish Transport Administration this is of interest for e.g. explosion in tunnels/over deckings or bridge columns or protective piers subjected to impact. It may also be applicable to buildings that do not belong to the Swedish Transport Administration, but which may be affected by the proximity of their transport artery.

The purpose of the project is to improve the ability to optimally design concrete structures subjected to impulse loading and to contribute to an increase in national competence development within this field. This is done by developing a calculation methodology for two main parts: plastic deformation capacity and shear capacity of impulse loaded structures. In addition, an inventory of the industry's special needs regarding impulse loading in dense urban environment, will be made. This inventory is then thought to provide the basis for future research work.