PELCAS

PELCAS investigates the standalone lateral performance of a lightweight cold‑formed steel assembly, the same exoskeleton concept developed in the LISESMACS and ROMASE projects. Unlike those studies, which evaluate the system when anchored to reinforced concrete frames, PELCAS focuses on the intrinsic behavior of the exoskeleton itself, tested independently to understand its structural contribution and deformation mechanisms.

The experimental campaign consists of quasi‑static cyclic lateral loading tests on modular steel assemblies equipped with different cross‑diagonal configurations. By evaluating strength, stiffness, ductility, and energy dissipation across multiple layouts, the project aims to identify the most effective bracing solutions and quantify how the system behaves under cyclic demands typical of seismic loading.

Social Impact

Lightweight steel exoskeletons represent a promising technology for improving seismic safety in existing buildings—especially in dense urban areas and historic centers where invasive retrofits are impractical. By clarifying how these systems behave and how they should be designed, PELCAS contributes to the development of accessible, modular, and minimally disruptive strengthening solutions. This supports communities in seismic regions by enabling safer buildings, reducing retrofit costs, and accelerating post‑earthquake recovery.

Ultimately, PELCAS helps transform an emerging concept into a validated, engineer‑ready technology, advancing seismic resilience while respecting the architectural and functional constraints of existing structures.

Practical Implications

PELCAS provides essential data for engineers seeking to use lightweight steel exoskeletons as reliable seismic retrofitting solutions for both masonry and reinforced concrete buildings. Understanding the standalone behavior of the assembly is a critical step toward developing analytical models, numerical simulation strategies, and design guidelines that accurately capture its lateral response. The project supports the creation of simplified yet robust design tools that practitioners can adopt in everyday engineering practice, enabling faster, more predictable, and more cost‑effective strengthening interventions.