The master thesis deals with the seismic strengthening of the load-bearing structure of the public primary school of Rihard Jakopič in Ljubljana. In the first part of the thesis, we made a brief overview of the regulation development for the seismic design in Slovenia. The thesis describes the procedure for the design of mitigation actions for the building from the assessment of the existing condition on the basis of the results of different testing methods, seismic analysis of the building in current state and design of restrengthening measures. An important part of the master thesis is the assessment of seismic resistance of the existing load-bearing structure of the building through non-linear seismic analysis provided by the software 3Muri. The input data for the numerical model were obtained on the basis of available technical documentation, investigation reports and our own non-destructive tests. Based on the results of the pushover capacity curves and the maximum displacements and accelerations obtained with the 3Muri program, it was determined that the existing facility does not meet current requirements for the seismic resistance.
In the last part of this thesis, mitigation actions were analysed with a set of possible strengthening measures. For this purpose we analysed different measures such as using steel window frames, adding load-bearing walls, applying reinforced concrete plasters and FRCM (fibre reinforced cement matrix) and assess their impact on the seismic performance of the building. In the final part of the thesis two the most successful solutions for the strengthening that satisfies the currently valid seismic requirements in Slovenia are presented in more details.