Effect of sandwich panels and metal plate shear panels on the seismic response of moment resisting frames

摘要

In the Ph.D. thesis, the seismic effect of cladding panels and steel shear panels on the reinforcedudconcrete and steel frames is discussed. We limited the research of sandwich panels to single-storeyudsteel frame buildings, where the use of the sandwich panels is common. Using multi-storey RC frameudbuildings, we examined the effect of shear panels, which have bigger shear capacity than the claddingudpanels. First, we performed extensive tests aimed at determining the capacity of the connection of twoudshear plates, then we performed nine tests of the systems of cladding panels with dimensions 3.0/2.6m.udThe tests have been examined closely and based on their results we defined a bi-linear envelope for anudequivalent diagonal. The diagonal is used to model the cladding panels in frame structures. Theudenvelope is defined on the basis of the bearing resistance of the steel sheeting, which is a result ofudshear test of the connection of two steel sheetings. In the cases, where experimental results were notudavailable, we applied the Eurocode 3 formulas for capacity. We used the American standard AISCudinstructions to define the properties of the equivalent diagonal.udWe presented the influence of sandwich panels on an industrial steel building of the manufacturerudTrimo. Results of numerical analysis show that sandwich panels are able to ensure a proper lateraludresistance. However, the measures that insure the proper behaviour of the panels are extremelyudexpensive and therefore economically unjustified. These expenses could only be reduced byuddeveloping a new cladding panel with better frame-to-panel and panel-to-panel connections. Weudexamined the influence of the steel shear panels on an old three-storey RC frame building (SPEAR).udWe also compared its behaviour with the behaviour of four buildings, that were designed in completeudor in partial agreement with Eurocode 8. The main purpose was to investigate the possibility forudstrengthening older constructions that were not designed according to seismic codes. We found that itudwas possible to ensure the Eurocode 8 seismic resistance, even for older constructions, with relativelyudsimple measures.