Objective 2: development of an algorithm for optimisation of retrofit measures (optimal location and optimal kind of measure as analysed previously in the PhD thesis, optimal sizes of the „retrofit elements“)
Parametrical study of the damages induced by earthquakes of different intensities, cumulated or not, on buildings having applied retrofit elements in different places, amounts or of different types.
FEM simulations. Novel is the use of fibre based software, which allows not only the determination of damage amount (like in usual displacement based approaches) but also the location on specific elements, thus permitting estimation of necessary repair works. Here, using the insights from that work the optimisation of the amount will be investigated, i.e. the ideal size of the retrofit elements.
Pushover analysis has been run for fibre reinforced polymer and concrete jacketing and the measures optimised multidisciplinarly according to a decision tree in case of a building designed specially for this purpose.
The pushover analysis has been run for two different stages of retrofit corresponding to two management strategy phases. It turned out that the first stage brings with it a worsening of the seismic behaviour. Therefore another management strategy has to be considered.
The applicant has been already familiar with the theory of finite elements and with the basics of how to use finite elements method based structural engineering software. The focus laid on advances issues, like material modelling of the fibre reinforced polymer retrofitting material. Another aspect the fellow received training in was how to perform and how to interpret a pushover analysis.
The pushover analysis, or in other words the static non-linear analysis is a method spread for the evaluation of the seismic performance of buildings. It is commonly used for the evaluation of technical retrofit strategies. New within this objective are the results achieved in what concerns the management retrofit strategy.