Study on vibration test of the scale-model system for highway bridge-vehicle interaction according to the similarity law

The similitude law of bridge-vehicle interaction system are presented by combining π theorem with dimension matrix analysis based on similarity theories of structure experimentation model. The ratios of similitude and similarity criteria of vibration test about the scale-model system for highway bridge-vehicle interaction are confirmed. Based on the simple girder bridge model test of perspex model that the scale factor of geometry is 10.0, the static and dynamic response of model bridge are studied subjected to a moving vehicle running on the smooth deck. The comparison of the testing results of model bridge and numerical calculation results of practical bridge conformed the similitude law of bridge-vehicle interaction model text. The results show the feasibility of model text equipment and the validity of the text results.