SREDAMS

SREDAMS investigates a novel retrofitting solution designed to restore and enhance the seismic performance of masonry shear walls after they have already experienced significant damage. The system consists of a modular lightweight steel net, composed of 40×40 cm units, which is anchored to the surface of pre‑damaged walls using only chemical anchorages. This approach avoids invasive interventions, preserves the existing structure, and enables rapid installation even in constrained or occupied environments.

The experimental campaign is based on quasi‑static cyclic in‑plane tests. Each wall is first loaded to its peak lateral strength to simulate realistic earthquake‑induced damage. The same wall is then retrofitted with the steel net, and its lateral response is re‑evaluated. This methodology allows for a direct and reliable assessment of the reinforcement’s contribution to strength, stiffness, ductility, and energy dissipation.

Social Impact

Many communities—especially in historic town centers and seismic regions—live in buildings that are vulnerable to earthquakes and difficult to retrofit using conventional methods. SREDAMS offers a non‑intrusive, cost‑effective, and architecturally compatible solution that can significantly improve safety without altering the cultural value of existing masonry structures. By enabling rapid post‑earthquake repair and strengthening, the project contributes to greater resilience, faster recovery, and reduced economic losses after seismic events.

Practical Implications

SREDAMS investigates a novel retrofitting solution designed to restore and enhance the seismic performance of masonry shear walls after they have already experienced significant damage. The system consists of a modular lightweight steel net, composed of 40×40 cm units, which is anchored to the surface of pre‑damaged walls using only chemical anchorages. This approach avoids invasive interventions, preserves the existing structure, and enables rapid installation even in constrained or occupied environments.

The experimental campaign is based on quasi‑static cyclic in‑plane tests. Each wall is first loaded to its peak lateral strength to simulate realistic earthquake‑induced damage. The same wall is then retrofitted with the steel net, and its lateral response is re‑evaluated. This methodology allows for a direct and reliable assessment of the reinforcement’s contribution to strength, stiffness, ductility, and energy dissipation.

Unreinforced condition

Retrofitted condition