Seismic retrofit system for single leaf masonry buildings in Groningen

Due to recent seismic activity in the Netherlands, the demand of adequate strengthening and retrofitting techniques increased, especially for single leaf masonry. Two Dutch companies founded in the re-gion have initiated an experimental program to study the applicability of existing stand-alone seismic retrofit systems on the unique and challenging situation in Groningen. During the out-of-plane experiments it was con-cluded that the existing materials used in stand-alone retrofit systems were insufficient and needed improve-ment. By applying special developed glue and combining two stand-alone seismic retrofit measures, an ampli-fying effect in terms of load bearing capacity and ductility was reached. The proposed seismic retrofit system is tested in bending on wallettes and on walls which were loaded in-plane.