Fatigue Performance Investigation for Suspenders of Arch Bridge Under Random Traffic Flow
To study the fatigue performance of suspenders,taking an arch bridge as the engineering background,a random traffic flow model including five parameters of vehicle type,lane,vehicle dis-tance,vehicle speed and vehicle weight was established using Monte Carlo sampling in MATLAB.The stress time history of the suspender under the load of random traffic flow was solved using AN-SYS to evaluate the fatigue damage and life of the suspender.It is found that the fatigue damage val-ues of the long suspenders in the mid-span and the short suspenders near the arch foot are higher than those of other suspenders.The greater the traffic density,the greater the fatigue damage value of the suspender,and the fatigue damage value of individual suspenders under different traffic densities can vary by 20 times.The density of traffic flow has a significant impact on the fatigue life of suspenders,and it is necessary to use long-term measured traffic flow data as much as possible to obtain satisfacto-ry prediction results.
万方数据
维普
