Hypervelocity And Overloaded Vehicles To The Damage Of Simply Supported Beam Bridge Based On Coupled Method

Coupled Vibration of Vehicle-Bridge performance: the impact of the vehicle through thebridge will cause the bridge vibration. Bridge vibration, in turn, creates incentives for thevehicle, so as to affect the vehicle’s safety and comfort. Tends to economic interests,hypervelocity and overload are common occurrences. Due to vehicle load, wind load,corrosion, internal material of the bridge structure will change and produce damage.Hypervelocity and overloaded vehicles bridge carrying overload, exacerbated by thedevelopment of bridge damage, and even cause the bridge collapse and other seriousaccidents. In this paper, research Bridge Coupling Vibration analysis hypervelocity andoverloaded vehicles on the dynamic response of highway bridges and damaged bridges. Themain contents are as follows:(1) Using direct integral Newmark-beta method in MATLAB software iterations andmode superposition method for solving the steady-state solution in the ANSYS and MATLABsoftware simulate mid-span deflection dynamic response.(2) The establishment of the Bridge Coupling Vibration equation, vehicles usetwo-degree-of-freedom half-car model and simply supported beam bridge use Euler-Bernoulli beam element. And analysis and comparison of speeding overloaded vehicles on thedynamic response of the bridge span deflection. The results show that the bridge spandeflection increases with the increase in vehicle load.(3) Bridge damage makes the displacement modal change, but the displacement modal isnot sensitive to damage. This article discussed the relationship between the displacementmodal curvature modal, modal shift difference method for solving curvature mode. Use ofstiffness decreased to simulate the bridge damage, and contrast natural frequency, thedisplacement modal, modal displacement, curvature modal, modal curvature of the injurydetermination result. The results showed that the natural frequency of the injury determinationnot only qualitatively but also quantitatively, but can not determine the damage location.Curvature mode is more sensitive to small damage, so we can use this method discriminatethe early damage in engineering.(3) Using of difference method obtain the curvature of the bridge under the hypervelocityoverload. The results show that increasing the weight of vehicles, the damage on the bridge isgreater. Hypervelocity vehicles on the Damaged Bridge and no damage results similar.