For constructions employing insulated metal sandwich panels engineers must account for seismic forces to ensure structural safety and occupant protection during earthquakes. These panels feature dual metal facings bonded to a low-density thermal core are popular for their speed of installation and thermal efficiency. Yet their limited rigidity combined with elevated mass-to-strength characteristics create distinct vulnerabilities in earthquake-prone regions.

The integrity of the panel-to-frame anchorage system is paramount. These connections must be designed to accommodate in-plane and out-of-plane movements without causing panel failure or detachment. Rigid connections may transfer excessive forces to the panels, leading to cracking or delamination of the core material. Flexible connections that allow controlled movement while maintaining lateral stability are preferred.

Another critical factor is the continuity of the lateral force-resisting system. Sandwich panels should not be treated as non-structural cladding. In many cases, they contribute to overall lateral stiffness, especially when properly anchored to beams and columns. It is essential to assess their potential role in lateral load transfer and tailor connection details.

Integrated design processes must align facade configurations with seismic performance goals.

The choice of core material directly influences seismic response.

The core material—whether it is polyurethane, mineral wool, or polystyrene—has different behaviors under stress.

Polyurethane and polystyrene cores are vulnerable to compaction under intense lateral forces.

Mineral wool provides enhanced ductility and thermal resilience under seismic stress.

Thinner skins risk wrinkling or out-of-plane collapse under dynamic loading.

The building’s form directly influences its dynamic response to ground motion.

Elongated, high-rise structures with wide panel modules exhibit higher torsional sensitivity.

Avoiding eccentricities and asymmetries reduces stress concentration risks.

Edge stiffeners, continuous lateral ties, کانکس ساندویچ پانل and robust foundation connections collectively enhance seismic resilience.

Inspection protocols are critical for sustaining long-term seismic integrity.

Small displacements or micro-cracks may initiate progressive failure.

Scheduled evaluations after tremors ensure timely intervention and prevent cascading failures.

In summary, while sandwich panels offer many advantages in modern construction their use in seismic zones demands careful attention to connection details, material behavior, structural integration, and long-term resilience. A holistic approach that treats the panels as part of the seismic force-resisting system—not just an envelope—will ensure safety and durability in earthquake-prone areas