多塔连跨悬索桥基频估算实用公式

Being considered one of the most important schemes in cross-sea bridge construction, the multi-pylon suspension bridge has its dynamic characteristics highly related to design parameters such as rigidity of the mid-pylon and numbers of main-span, which made the existing fundamental frequency estimate formula in current code unavailable. Based on the energy principle, a new formula that can be applied to multi-pylon suspension bridges is proposed and simplified for practical use. Then the estimate results with respect to the changing design parameters are given, which shows this formula has enough accuracy to utilize in practical works.