On the basis of the strut-and-tie model for prestressed deep girder and on the principal of local analysis of structure,this paper makes a study of and proposes a local analysis method of the strut-and-tie model for prestressed continuous girder with its local part equivalently transferred into the prestressed deep girder.

In this article the local analysis of steel-concrete combined sections in a composite cable stayed bridge with single tower and double cable plane is carried through as an example,which is the No.

According to the complexity and particularity of the project, this paper presents a finite element method of both global analysis and local analysis for the airport building of Beihai.

During the stage of design,static analysis dynamic analysis and detail analysis were carried out,which made the structure safe and rational.

After analysising, presents a check method which is based on the "partial analysis", this method can accomplish the small dirt check very well.

In addition,establishment of finite element model for a complicate bridge,simplification for a longitudinal steel-box girder,disposal technique of partial analysis for complicated connection and .