Research On Hinge Joints Of Hollow Stab Under Vehicle-bridge Coupling

Vehicle-bridge coupled vibration problem research has a long history, but in theresearch of railway Bridges is more, and less in highway Bridges, but with thedeveloping of highway transportation and vehicle load is more and more big, thedamage of highway Bridges under the action of vehicles becomes more and morecommon, people have to focus to highway bridge vehicle caused by vibration problem,but for the vehicle-bridge coupled vibration research focused on the overall responseof bridge, bridge for local vibration research is less. Hollow slab bridge, as a kind ofcommonly used small and medium span Bridges, the hinge joint damage in severecases, this article from the vehicle-bridge coupled vibration of the vibration of thehinge joints in hinged situation of the research.We know the vehicle vibration is a factor in the damage of the hinge joints, butwhen we have the design by considering the impact coefficient. And reality is theresulting vibration damage or many, this means that the impact of the design withcoefficient than the actual impact coefficient caused by vehicle hinge joints is muchsmaller, this paper from the perspective of impact coefficient to compare whether theactual impact coefficient of the hinge joints in hinged impact coefficient is greaterthan the norms.There are many factors influencing the impact coefficient, this paper considersthe bridge deck roughness, vehicle speed and vehicle stiffness influence on impactcoefficient. Vehicle-bridge coupling model is established in this paper, throughANSYS, the model is solved by coupling method. For bridge deck roughnessconsideration is considered, by vehicle additional dynamic load simulation byMATLAB programming to different grade pavement treatment, in order to get avariety of road grade simulation diagram, and in a variety of road grade is obtained byprogramming the additional dynamic load of the size of the vehicle. For vehicle speedand rigidity, through ANSYS modeling process, considering given different speed andrigidity. In the end, this paper considers the influence of various factors, found the hingejoints in hinged model calculation of impact coefficient calculation of impactcoefficient than specification, it is also a car vibration caused by an important reasonfor the destruction of the hinge joints. This side also reflect a whole impact coefficientto design the bridge there is unreasonable.