Fatigue damage risk assessment of airport concrete runway based on intelligent algorithm

Fatigue failure issues of runway at airports have become one of core tasks in airport safety management. How to recognize fatigue failure risk factors of concrete runways at airports and implement a quantitative assessment on failure risks of runways is a key topic that is studied in the industrial circle and academic circle at present. For this reason, an integral analysis on internal and external causes of fatigue failure of runways was carried out, which recognized and extracted 18 risk factors. Evaluation values of quantitative risk factors were calculated through a threshold method and evaluation values of qualitative factors were determined by expert scoring. Subsequently, weights of all risk factors were given by G1 method. Finally, the comprehensive risk evaluation value of concrete runways was gained through layer-by-layer coupling. A case study was carried out in the A airport. Results show that the calculated comprehensive risk evaluation value of fatigue failure of concrete runways at airports by the proposed method is basically consistent with engineering objective practical value. The proposed method is expected to be applicable in other airports. The comprehensive risk evaluation value of the concrete runway failure at A airport is 0.49, indicating certain risks of fatigue failure. It is necessary to adopt engineering and management measures according to risk factors with large evaluation values to control the fatigue failure risks. This study concludes that the proposed fatigue failure risk index system of concrete runway of airports is scientific and effective. Moreover, the proposed risk evaluation method is feasible and it provides a new idea and method to fatigue failure risk evaluation of concrete runways at airports.