Evaluation Method of Driving Safety and Comfort under Vehicle-Bridge Coupled Vibration for Large Span Bridge with High Piers
|Course||Bridge and Tunnel Engineering|
|Keywords||Bridge Coupling Vibration Road safety and comfort Numerical calculation 1 /3 octave band method|
With the development of transport services , China has built tens of thousands of bridges , including high pier and long span prestressed concrete bridge increasingly wide range of applications at the same time , more and more vehicles traveling on roads and bridges highway bridges axle coupled vibration problem gradually began to bridge sector concerns . Compared with the railway bridge has been formed to train safety and comfort evaluation system , China is currently driving safety and comfort evaluation research for roads and bridges is relatively small , especially for high- pier bridge span bridge Coupled Vibration situation driving safety and comfort evaluation method , countries less . In this paper, the development of transportation construction issues high pier span bridge bridge Coupled Vibration and impact analysis study sub-topics highway bridges bridge Coupled Vibration analysis on driving safety and comfort , respectively, to a continuous beam bridge continuous rigid frame bridge , rigid frame - a continuous combination system bridge is based on the project , using the biaxial space 7 degrees of freedom vehicle model , the use of a numerical analysis method , by simulating a variety of deck driving conditions , driving on the bridge Coupled Vibration security and comfort evaluation method for the numerical simulation analysis . Through a large number of numerical calculation for different speed , different road level , respectively, to make the vehicle bridge driving the nod acceleration and tilt angular acceleration curve envelope diagram ; evaluation of the use of the 1/3 octave band of vehicles traveling on the bridge time curve when the driver's position at the vertical acceleration Fourier transform, the the acceleration variance curve compared to the curve with the ISO 2631 standard specifies the fatigue - reduce ergonomics boundaries , under which evaluated the vehicles based on the project bridges multiple loading conditions driving the driver 's comfort . This paper studies the evaluation method , axle coupling class bridge the vibration driving safety and comfort evaluation and provide a reference .