Vibrations of Combined Arch Systems: Rigid Beam-Flexible Arch

This chapter describes free vibrations of combined systems such as “rigid beam-flexible arch,” considering the dynamic thrust when the axes of the arch are outlined by a square parabola and a circular arch. Problems and solutions are discussed. A methodology and results of a dynamic testing model of rigid beam-flexible arch and an experimentally theoretical method for calculating combined systems taking into account joint dynamic work of the main span to adjacent bridge trestles using factor “increasing” frequency are presented. A study and analysis devoted to the oscillations of a combined system accounting for its extent at a given harmonic motion base is given. A method of seismic analysis of combined systems with regard to their length using real seismograms of powerful earthquakes and general equations of motion for a system with a finite number of degrees of freedom in a spatial deformation structure are also discussed.