Experimental study on the performance parameters of bridge shock absorption

model;  damping;  phase;  pier height;  support shear stiffness;  Seismic waves

The damping, pier height and shear stiffness of the support have important influences on the dynamic behavior of the bridge, and it is of great guiding value to study their role in shock absorption and seismic design. Through the continuous bridge model shaker test, the effects of damping, pier height and supporting shear stiffness on the shock absorption performance of the model beam and pier were analyzed: the higher the pier, the more favorable it is to its own seismic resistance and unfavorable to the superstructure. The greater the shear stiffness, it is not good for the superstructure, it is also not good for the substructure, and the greater the damping, the better. The test shows that proper adjustment of damping, stiffness and pier height will reduce the vibration amplitude and disturb the regular phase during the vibration process, so as to obtain a good shock absorption effect.