Tuned damping method for seismic isolation of pile foundations in deep-water long-span continuous rigid frame bridge

Abstract

Some embodiments of the disclosure disclose a tuned damping method for seismic isolation of pile foundations in a deep-water long-span continuous rigid frame bridge, which relates to the technical field of shock absorption for bridge engineering structures. It solves the problem that the “pile foundation seismic isolation” of deep-water long-span continuous rigid frame bridges lacks a theoretical quantitative calculation method, making it impossible to fully exert the effect of “pile foundation isolation”. The present disclosure includes: simplifying a deep-water long-span continuous rigid frame bridge model into a 2-degree-of-freedom dynamical model; setting an optimization objective function based on the 2-degree-of-freedom dynamical model; performing parameter optimization based on the optimization objective function; and determining structural seismic parameters of the deep-water long-span continuous rigid frame bridge based on parameters optimized in step 3.

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