Scientists create a steel sphere device that could protect buildings from earthquakes without electricity

Researchers at the University of Sharjah have developed a newly patented seismic damping device that does not depend on electricity, sensors, hydraulic fluids or complex electronics. Instead, the system relies on something remarkably simple: steel balls moving inside a hollow cylinder and converting earthquake motion into friction.

Developed by civil engineering professor Moussa Leblouba, the passive damping mechanism is designed to reduce vibrations in buildings, bridges and other structures exposed to seismic forces. The US patent for the technology was issued in December 2025.

The concept is still being tested, but its simplicity could prove particularly useful in places where earthquakes can damage both buildings and the infrastructure needed to power modern safety systems.

How the steel-ball earthquake damper works

The device consists of a hollow steel cylinder packed with solid steel balls. A shaft fitted with short radial rods sits inside the cylinder.

When an earthquake causes a structure to move, the shaft moves through the packed steel balls. The interaction between the moving components creates friction, dissipating some of the mechanical energy produced by the vibrations.

In other words, instead of relying on an electronic system to detect an earthquake and respond to it, the device reacts automatically to the movement itself.

Research published by the University of Sharjah under the title “Assessing the performance of a novel granular material-based energy dissipation box damper for earthquake-resistant structures” describes the mechanism as a granular-material-based energy dissipation system.

Professor Leblouba has emphasized that the device works through what he describes as “pure physics.”

Why operating without electricity matters

The absence of a power requirement could be one of the device's most important characteristics.

Major earthquakes can knock out electricity, damage communication networks and disrupt critical infrastructure. A sophisticated protection system that depends on powered sensors or electronic controls can therefore face an additional vulnerability during precisely the event it is supposed to help withstand.

A passive mechanical damper has no such dependency.

As long as the structure moves and the mechanical components remain intact, the system can respond to that movement without needing an external power supply.

That makes the concept particularly interesting for disaster-resilient infrastructure, where reliability during an emergency can be just as important as performance under normal conditions.

Early tests showed about 14% damping

Laboratory experiments at the University of Sharjah produced an effective damping ratio of approximately 14%.

That number should not be interpreted as meaning the device simply eliminates 14% of an earthquake's overall force. Damping ratios describe how a system dissipates vibrational energy relative to its motion, and actual structural performance depends on factors such as the building, earthquake characteristics, device configuration and installation.

Still, the early result suggests that friction between the steel balls and the internal mechanism can dissipate a meaningful amount of vibration energy.

The researchers now plan to conduct larger-scale shake-table experiments to determine how the system behaves under more demanding seismic conditions.

A potentially cheaper alternative to conventional dampers

Earthquake-resistant structures already use several types of damping technologies, but many involve sophisticated mechanical, hydraulic or electronic components.

The Sharjah device takes a different approach.

Its relatively straightforward construction could potentially make it cheaper to manufacture and maintain. The modular design is another potential advantage: researchers say individual components can be replaced rather than requiring the entire damping system to be discarded.

That could become particularly valuable when earthquake protection needs to be installed across large numbers of buildings.

It could also retrofit older buildings

One of the more interesting possibilities is retrofitting.

Millions of buildings around the world were constructed before modern seismic standards became widespread. Rebuilding them completely to improve earthquake resistance is often impractical because of the cost, disruption and engineering challenges involved.

A compact passive damping mechanism could offer another option if future testing confirms that it can deliver useful protection when installed in existing structures.

For developing regions with large populations living in older or vulnerable buildings, relatively simple seismic technologies could therefore have considerable practical value.

But that possibility remains prospective. The device is still undergoing testing, and larger experiments will be necessary before its effectiveness in real buildings can be properly established.

The technology may extend beyond earthquakes

The same principle could potentially be useful anywhere unwanted vibration needs to be controlled.

Researchers have suggested possible applications in areas such as communication towers, industrial machinery, aircraft, ships and scientific instruments.

The underlying idea remains the same: allow mechanical movement to interact with granular material and friction so that some of the energy is dissipated rather than transferred directly into the protected structure.

What comes next

The next stage will involve larger-scale shake-table testing designed to recreate earthquake conditions and expose the damper to stronger forces.

Researchers also intend to investigate how changing the size of the steel balls and the configuration of the radial rods affects performance. Different structures may require different combinations to achieve the desired damping characteristics.

For now, the invention remains in the experimental stage. A laboratory result of around 14% is promising, but it is not enough by itself to establish how the technology would perform during a major earthquake.

Still, there is something compelling about the approach.

Modern earthquake engineering can involve sophisticated sensors, control systems and advanced materials. This invention goes in almost the opposite direction: a mechanical device that needs no battery, no software and no electrical signal to do its job.

In a disaster, when power and communications may be among the first things to fail, that simplicity could turn out to be its biggest strength.