Chinese Engineers Spent 20 Years Solving How to Stop Bridges From Swaying in Typhoons

What happens when a typhoon slams into a suspension bridge a mile long? The deck can sway several feet. Cables vibrate. Traffic stops. In the worst cases, the structure itself is at risk.

For decades, civil engineers had three questions with no good answers: How much will a specific bridge sway in a specific storm? Can we predict it in time to do something? And, most importantly, can we actively dampen that motion before it becomes dangerous?

A research team at Southeast University in Nanjing just picked up a National Science and Technology Progress Award for solving all three.

Led by Professor Wang Hao, the team spent more than 20 years building what they call a “perception-prediction-cooperative control system” for long-span bridges. The core idea is straightforward: measure the wind in real time, predict exactly how the bridge will respond, then adjust damping hardware before the sway gets bad. The hard part was making each step work at engineering scale.

The first invention was a wind-sensing device that filters out the bridge’s own motion. This matters because a swaying bridge creates its own air currents, contaminating the very data you need to predict future sway. The team’s adaptive sensor strips that noise out, giving accurate wind readings even as the bridge moves underneath it.

Second, they built a probabilistic prediction model trained on massive datasets of bridge responses. What used to take hours of computation now resolves in seconds — fast enough that the system can react while a typhoon is still hitting the bridge, not after it’s passed.

Third came the hardware: frequency-tunable, high-energy-dissipation vibration control devices that can absorb significantly more kinetic energy than previous designs.

The three pieces lock together in a closed loop: real-time wind data feeds into the prediction model, the model forecasts the bridge’s motion, and the control system adjusts dampers accordingly. All of this happens while the typhoon is actively pushing on the structure.

According to Wang, more than 70 percent of China’s long-span bridges sit in areas prone to strong winds or typhoons, a risk compounded by climate change. The team’s technology has already been deployed on over 100 major bridges domestically and internationally, and has held up through multiple severe typhoon events.

Among the bridges using the system are some of China’s most famous engineering landmarks: the Sutong Bridge, the Third Nanjing Yangtze River Bridge, the Wufengshan Bridge, the Dashengguan Bridge, and the Ma’anshan Yangtze River Highway-Rail Bridge. Each is the kind of structure where a few inches of unexpected sway can shut down rail lines and strand thousands of passengers.

The system earned a second-class prize in this year’s National Science and Technology Progress Awards, one of China’s highest honors for applied research. Wang’s broader work covers structural wind resistance, disaster prevention, vibration control, and smart infrastructure monitoring, backed by more than a dozen national and provincial research grants.

There’s a quiet tension in how we build at scale: the bigger the bridge, the more it moves. This project doesn’t eliminate that tension, but it gives engineers a real-time dashboard for managing it — and that alone is a meaningful advance for anyone who crosses a long-span bridge during typhoon season.