CLT used as seismic strengthener for existing masonry walls

This paper presents an innovative technique for seismic retrofit of existing masonry wall. The chance to give the structure more resistance against horizontal forces thanks to the use of Cross Laminated Timber is investigated using laboratory tests and numerical simulations. Two samples of masonry were built with the same dimension and features. On one sample, a CLT panel had been fastened on both sides. Experimental tests were carried out, according to the EN12512 protocol. The two tests allow a comparative statement of the wall, with and without the coupling with timber panels. The study was cross checked thanks to nonlinear numerical simulations of both samples, masonry and connection behaviour was calibrated on experimental data available in literature. This research aims to explain a new technique which can be used for seismic retrofitting of modern or historical buildings. Results demonstrate that where CLT jackets existing masonry wall, an increase in terms of strength, stiffness and dissipation capacity was recorded without significant increase in the global mass of the buildings.