Research On Dynamic Characteristic And Seismic Response Of The Prestressed Continous Concrete Box-girder Bridge With Corrugated Steel Webs

The prestressed continous concrete box-girder bridge with corrugated steel webs is one kind of new bridge type which appeared in 1980s. At present, the research on the structure is mainly concentrated in structural behaviour such as shear buckling pattern of corrugated steel webs, bending and torsional capacity, including model experiment and finite element numerical analysis. At the same time these are essentially based on static research, while the dynamic performance studies are very few. With a gradual application of the prestressed concrete box-girder bridge with corrugated steel webs, it is necessary to study its dynamic characteristics and dynamic response.Based on a brief introduction of the prestressed concrete box-girder bridge with corrugated steel webs, taking a constructed bridge as reference, according to the related design-standard, a PC box-girder bridge with corrugated steel webs with spans of (30+40+40+30)m is designed and compared with an equivalent PC box-girder. The Aim lies in discussing vibration characteristics of PC box-girder bridge with corrugated steel webs, and providing suggestions for design.In this thesis, the main contents include:1. The design of the PC box-girder bridge with corrugated steel webs and the equivalent PC box-girder bridge;2. The static analysis and safety checking of the PC box-girder bridge with corrugated steel webs and the equivalent PC box-girder;3. The dynamic analysis of the PC box-girder bridge with corrugated steel webs and the equivalent PC box-girder, and design references are given based on the comparison between the two kinds of bridges;4. The earthquake response analysis of the PC box-girder bridge with corrugated steel webs and the equivalent PC box-girder, and design references are given based on the comparison between the two kinds of bridges.