Both Continuous Beam Bridge Seismic Assessment Methods And Model Test Research

According to the deformation of the piers on the elastic foundation, which includes the elastic deformations only caused by force and the deformations caused by the rotation and translation of the foundation, the basic oscillation shape function of the piers is put forward , in the same time, the whole seismic vibration equation of continuous beam is derived from the Lagrange Equation ,and the seismic force which involves the integrated parameter y1,y2,y3 is calculated with the help of the response spectra method. On the other hand, model indoors is built by the similar theory. Using the model parameter from the dynamical experiment ,the integrated parameters can be disassembled ,thus the structure's frequency and the influencing coefficient of their oscillation mode are solved .It's tested from the model experiments and FEM that the model given by the article has the virtue of explicit concept and convenient method and high accuracy, and it can give reference to evaluate the load capacity of bridge .In the end, in order to assess the existing bridge's seismic resistance performance ,force reduction factor with ductility is recommended to reflect the seismic force of the structure during the elastic and plastic periods.