Abstract: Under the presupposition of stable abutment, this paper deals with trussed-arch bridge in which dynamic properties, coupling of vibration types, support conditions as well as vertical component in the analysis of seismic response are fully discussed. Comparisons are also made between static and dynamic analysis in order to study the vibration resistance of single span reinforced concrete trussed arch bridge. Finally, attention should be paid to the problems closely related to this category of arch bridge in earthquake design.