Based on the results of WP3, this WP provides a set of new standards combined within an integrated analytical approach for the out-of-plane seismic assessment and subsequent intervention design of heritage masonry buildings. This is the main challenge of S4H, since it introduces rational rules for a task that has been approached mainly empirically.
First, the definition of damage limit states specific to heritage buildings (WP4a) is addressed. Thresholds for corresponding out-of-plane displacement are missing and will be supported by testing in the shake table.
New seismic performance indicators are also a novel aspect to address (WP4b). Peak ground velocity and Arias intensity seem as good indicators for damage correlation with seismic intensity, but this is far from consensual. The shaking table tests in WP2 will enable propositions of new formulations, e.g. based on the balance of kinetic energy. The out-of-plane displacement trend for walls is another indicator to consider. All the new analytical approaches are to be calibrated (WP4c) against the shaking table tests in WP2.
Finally, guidelines for performance-based assessment to support the intervention design of heritage buildings are formalised (WP4d). The methodology supported by the application of the developed tools will apply the concept of performance matrix to decide upon optimal interventions.