Earthquake-resistant technology may soon become simpler, cheaper and more reliable thanks to a patented steel cylinder developed by researchers at the University of Sharjah.
The passive seismic damping device, invented by civil engineering professor Musa Lelouba, uses friction generated by steel balls inside a hollow cylinder to absorb earthquake vibrations in buildings, bridges and sensitive infrastructure without relying on electricity. Unlike traditional dampers that rely on sensors, fluids or energy sources, this mechanical shock absorber works through “pure physics”.
Early laboratory tests have shown an effective damping ratio of about 14%, raising hopes for stronger earthquake protection, lower maintenance costs and safer infrastructure during power outages.
How does a steel spherical earthquake damper work?
The new patent for an innovative seismic damping mechanism turns out to be fairly simple in terms of operating principle. It consists of a hollow steel cylinder with solid steel balls inside as well as a shaft with short radial rods fixed in it. As reported in a research conducted at the University of Sharjah referred to as “Performance Evaluation of Energy Dissipation Box Damper Based on New Granular Material for Earthquake Resistant Structures,” once an earthquake begins to vibrate, the vibration motion pushes the shaft through the packed steel balls, dissipating the vibration energy through friction.
As Professor Lelouba pointed out, this mechanism does not operate with any electrical energy whatsoever. He pointed out in interviews published via research advertisements related to the patent that the mechanism works purely physically, through friction.This is of particular importance, taking into account the phenomenon of power outages, which usually occur during strong earthquakes. Contemporary protection mechanisms are generally based on electronics and sensors, and therefore become ineffective after loss of electrical power, which does not happen in the case of this mechanism.
This US patent was issued in December 2025.
Why is passive earthquake protection important?
There are many structures built long ago, which are exposed to seismic activity. Conventional dampers for these types of activities can be relatively expensive to manufacture, repair and replace if necessary.However, the ball bearing mechanism provides a cheaper option since it is modular and its components can be replaced. According to the researchers’ claims, the system modules can be easily replaced without having to replace the entire structure.In tests conducted in the University of Sharjah laboratory, the new system was able to absorb only about 14% of the vibration energy, which is not a large number. However, structural engineers are of the opinion that some energy dissipation would go a long way in reducing the load during an earthquake.The ability to retrofit existing buildings is another great advantage of this invention. It would enable people living in developing countries to protect themselves from earthquakes by installing dampers in existing building structures without undertaking any reconstruction.
Potential uses outside buildings and bridges
Although designed primarily for earthquake engineering, it has been suggested that this new technology may also work for other vibration-sensitive applications. Some of these proposed applications are communications towers, industrial machines, aircraft, ships, and scientific instruments.This next step will include larger-scale shaking table tests, which will create a simulated seismic environment and study the effect of stronger seismic forces on the invention, while varying the sizes of the steel balls and the configuration of the bars for various structures.At present, the invention is still in the testing phase, although some experts believe that this new technology may be valuable due to its simplicity, especially in disaster engineering. The technology that works during times like these is often the most valuable technology of all.