Dynamic Characteristics and Three-Dimensional Seismic Response Analysis of Self-Anchored Cable-Stayed Suspension Bridge

The main bridge of Dalian Gulf Bridge is a kind of self-anchored cable-stayed suspension bridge with 800m main span.The dynamic characteristics of this bridge is analyzed,and the seismic response is analyzed with response spectrum method based on the three level earthquake fortification in Chinese seismic design code.In order to ensure the computing precision,the first 120 mode of vibration are gradually summed up.The CQC method is applied to the response spectrum computation.Finally,some conclusions are drawn which will be helpful to the preliminary design and construction of the similar bridge.