BRIDGE MODEL UPDATING AND IDENTIFICATION OF PARAMETERS OF VEHICLES TRAVELING ON BRIDGES
Identification of parameters of vehicles traveling on bridges is important for bridge design and maintenance. This paper presents a methodology of identifying the parameters of vehicles traveling on bridges. In order to correctly identifiy vehicle parameters,the finite element model of the bridge is first modified using model updating method whose purpose is to achieve better agreement between the numerical and field measured bridge responses and thus to obtain an accurate bridge model. The parameters of vehicles traveling on the bridge are then identified by optimizing an objective function,which is built up using the residual between the measured bridge response time history and predicted response time history using the Genetic Algorithm. The model updating method is applied to update the finite element model of an existing prestressed concrete bridge. Reasonable physical explanations are achieved for the updated bridge parameters. The parameters of a real truck are identified in both a numerical simulation and a field study using the developed identification methodology. Since it is able to identify the parameters of moving vehicles,the proposed methodology can be applied to improve the current weigh-in-motion techniques that usually require a smooth road surface and slow vehicle movement to minimize the dynamic effects.
Vehicle parameters Bridge model updating Genetic algorithm Parameter identification
Lu Deng C.S. Cai
Department of Civil & Environmental Engieering,Louisiana State University,Baton Rouge,LA 70803
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
1631-1637
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）