Taking Chaobai River Bridge in Jingcheng Expressway as the engineering background, the article introduces the selection process of 3-phlon partial cable-stayed bridge structural system, and through the numerical analysis, compares the reactions of the different structural systems under the external action, and uses the measures using damper to reduce the earthquake effect of the structure.

In the light of the characteristics of extradosed bridges and with regard to the construction of the Huanghe River Bridge on Ahrongqi-Shenzhen Expressway,this paper presents the contents,methods and key techniques for construction monitoring and control of the Bridge.

The Huiqing Huanghe River Highway Bridge at Qingzi Road is an extradosed bridge with rectangular shape pylons,rigid fixity of the pylons,girder and piers and with inclined diaphragms arranged in the main girder nearby the pylons.

Segment model test research on saddles of partially cable-stayed bridge;

Structural System of Partially Cable-Stayed Bridge and analyses of Cable-Force;

The different combination models of cables,towers, beams,piers of partially cable-stayed bridge can compose different structure systems.

Taking into account of the properties of the partially cable stayed bridge,the influence of structural load effects arising from some main structural parameters such as height of main beam,height of towers,the bending stiffness of towers,the ratio of center span and side spans,the length without cable of side spans and center span is researched in this paper.

Designing parameters of partially cable stayed bridge are analyzed and structural characteristics of cable stayed bridges are compared with that of continuous girder bridges.

The design characteristics of stay cables of partially cable stayed bridge referring to Xiaoxihu Yellow River Bridge in Lanzhou are presented.