Analogue Simulation And Research On Evaluation Meth-odology Of Bridge Evenness

This subproject belongs to "Analogue Simulation And Research On Evaluation Meth-odology Of Bridge Evenness", which depended on "The West of China development-Cou-pled Vibration Of Vehicle-Bridge In High Piers And Long Span Bridge and Analysis of its influence". It has realized that bridge evenness is very important for the vibration of vehi-cle-bridge through the research. However, the simulation parameters of bridge evenness is very hard because of the uncertainty in actual. And the objective evaluation system in the bridge evenness is shortage and classify is difficulty. The dissertation discusses the three points:The detecting instrument and measuring principle of bridge evenness; numerical sim-ulation in bridge evenness; method to evaluating the bridge evenness.The detecting instrument of evenness has about three types:section class,response class and subjective evaluation. There are different kinds of benefits and limitations. So, it should synthetically think over the vertical section form,vertical section length,needed manpower,material resources,financial resources,the accuracy of road evenness data,required time and so on,and achieve the target "Concrete analysis of concrete conditions", when measuring the road or bridge evenness and getting the reasonable evenness data. With regard to the bridge evenness, especially to the evenness in high piers and long span bridge, getting rid of inter-ference factor of bridge vibration during the measure is needed when measuring the bridge evenness.This dissertation uses the computer language written by myself to simulate bridge evenness during the given PSD. The methods are white noise and inverse fourier transform. This method can avoid the complex process of measuring the bridge evenness, reduce the in-put to manpower material resources,financial resources and provide the basic data to study the vibration of vehicle-bridge. Finally, it presents a method to evaluating the bridge evenness, which establishes the relations between PSD index and other index and transforms evenness data into PSD data, then contrasts the PSD data to the given PSD data and assesses the evenness ranks. Last we use the two different analogy methods of evenness and the actual engineering projects to prove the soundness of the evaluating methods.