Analysis method for seismic isolated large-scale bridge structures

In design,isolating the seismic load to meet anti-seismic design requirements of the large-scale bridge structure was generally recognized in recent years.Some key issues in seismic isolation bridge design were discussed.The status quo of the seismic isolation design on the bridge was expounded.Then solutions and recommendations were principlely proposed.As the excitation source for structural seismic response,earthquake dynamic input should be aimed at certain specific site.At the same time the particularity of space effects and time effects of the large-scale bridge structure is reflected.To establish a reasonable and reliable structure analysis model,the nonlinear model should be considered.Several items,such as the structural damping ratio,the pile-soil cooperation,and simulation method of connect components in the simulation modeling were important.The structure of the nonlinear process should be described accurately when the earthquake response of seismic isolation structure was analyzed.Mean while the high efficiency and the convenience should be considered.