La tecnologia che spiega perché alcuni edifici resistono a un forte terremoto mentre altri crollano in pochi secondi

A powerful earthquake struck Venezuela on June 24, triggering two consecutive tremors that devastated parts of the country. The disaster left hundreds of families displaced and emergency teams still working tirelessly to locate survivors. Amid the chaos, experts have turned their attention to a critical factor that determines whether buildings survive such catastrophes: advanced seismic isolation technology. The recent earthquakes in Venezuela highlighted the vulnerability of structures built without modern safety measures. In contrast, some buildings withstood the shaking with minimal damage. This disparity has sparked renewed interest in seismic isolation systems, which allow structures to absorb and dissipate energy during ground movement. These technologies can significantly reduce the impact of earthquakes, offering crucial protection to both infrastructure and human life. Seismic isolation works by decoupling the movement of the ground from the building itself. This is achieved through specialized devices installed at the base of structures. According to Seismic Intelligence, a company specializing in this field, these isolators can reduce forces and deformations by up to 80 percent. This means that even during major quakes, the structural integrity of buildings remains largely intact. There are two primary types of seismic isolators: rubber-based and friction-based. Rubber isolators consist of layers of natural rubber and steel, sometimes including a lead core to enhance energy dissipation. Friction isolators operate using a sliding mechanism over polished steel surfaces, allowing controlled lateral movement while maintaining vertical stiffness comparable to reinforced concrete columns. Both types offer long-term durability, with lifespans exceeding five decades under normal conditions. These systems are increasingly being used in new constructions and retrofitted into existing buildings. They are particularly valuable in hospitals, bridges, data centers, museums, residential complexes, offices, commercial centers, and historic sites. Their application helps ensure that essential services remain operational even after a quake, minimizing disruption and enhancing public safety. The importance of seismic isolation was underscored by the recent events in Venezuela. While no one can predict when an earthquake will strike, engineers emphasize that preparedness is key. Technologies like Google’s Android-based early warning systems provide precious seconds for evacuation or sheltering. However, the design and construction of buildings play a decisive role in determining how well they withstand seismic activity. Experts stress that while earthquakes themselves cannot be prevented, their effects on buildings can be mitigated through engineering innovation. As more regions face rising seismic risks due to tectonic shifts and urban expansion, the adoption of seismic isolation becomes not just beneficial, but essential. The lessons learned from Venezuela serve as a sobering reminder of the need for resilient infrastructure and proactive planning in earthquake-prone areas.