Innovative method for incremental dynamic analysis curves in semi-isolated bridges

This paper proposes an innovative method for determining the approximate incremental dynamic analysis curves of semi-isolated bridges, including derivation statistical mathematical formulas. Ultimately, is devised based on primary and limit state tangential stiffness values bridges. The bridges selected this study are two reinforced concrete highway in United States, which have been optimally re-designed using lead rubber bearing isolators. established procedure can be used future studies to extract probabilistic responses via a simplified efficient method.