Impact Factor Sensitivity Of Long-span Curved Continuous Rigid Frame Bridge With High Piers Based On Uniform Design

In recent years,with the rapid development of China’s transportation, many bridges hasbeen built, so the impact factor of curved bridges have become more and more important. Sofar,there are many parameters which influence Impact factors,sensitive analysis of the impactfactor of sensitive analysis is the straight bridge, and the effect of curvature radius on thebridge impact factor has not been studied. Therefore, the analysis of the impact factor ofcurved bridges about sensitive parameter is of important for the assessment of engineeringand theory as well as for engineering design and construction guiding.A high pier and long span curved continuous rigid frame bridge is taken as thecalculation model, in the basis of the existing research.The radius of curvature, bridge pier,the vehicle and the bridge deck roughness are taken as sensitive parameters as the researchobject, using the uniform design experiment method,the normal range of the parameters areestablished as15conditions, calculations were performed using the vehicle-bridge couplingsystem, the side span, the support and mid-span deflection, impact factor of bending momentand torque are studied. Through regression analysis method, the effects of various parameterson the impact factor are analyzed, ultimately the parameters of the sensitive are determined.Finally, through compare with the impact factor of multiple vehicles and coupled cars for highpier and long span curved continuous rigid frame bridge,research the impact factor of highpier of curved continuous rigid frame bridge in Computer Science.Through the above analysis,the calculation results show that: the bridge deck smoothness of high pier and long spancurved continuous rigid frame bridge influence bridge impact coefficient, the lower unevensmoothness grade, the greater. Sensitive sequence of each parameter of continuous rigid framebridge with high pier and long span is as: bridge deck roughness, bridge curvature radius,height of pier, vehicle driving mode.Finally, compared the impact factor of the coupled carsand multiple vehicles, results show that the impact factor of coupled cars is greater thanimpact factor of multiple vehicles,the impact factor of measured is conservative.Impact factor sensitivity analysis presented in this paper can provide reference for thestructural performance evaluation of old bridge, provide reference calculation can also be anew round of regulation of impact factor.