What does the term "bridge fatigue" imply from an engineering perspective?

The term "bridge fatigue" refers specifically to the cumulative damage that occurs over time due to repeated loading and unloading cycles. This phenomenon is a critical consideration in bridge engineering, as bridges are subjected to various forces from vehicles, environmental conditions, and their own weight.

As loads are applied and removed repeatedly, materials experience microstructural changes, which can lead to the initiation and propagation of cracks. Over time, this cyclic loading can compromise the structural integrity of the bridge, potentially leading to failure if the damage is not monitored and managed appropriately.

Understanding bridge fatigue is essential for engineers as it influences the design, inspection, and maintenance strategies to ensure long-term safety and functionality of bridge structures. This is why the feedback system or maintenance protocols may be designed around identifying signs of fatigue well before they result in significant structural issues.