The new-beach-bridge box girder 0# adopted the construction scheme which setting the steel corbel on the thin wall pillar side as mainly holding component,contemporarily using independently designed compound section steel box girder and Behre beam separately as temporary supportting structure system for the vertically and horizontally stressing main girder.

Steel corbel as passing components in steel structure has been widely used, which is often used in industrial and civil construction works in connected location and plays an important role in large-span space structure.

7,the hysteretic behaviors of mega steel columns braced with inversed V shape bracings and X shape bracings are studied with some influencing factors,including loading modes,axial compression ratios,slenderness ratios of braces,axial stiffness of braces,and stiffness of beams.

7,the hysteretic behaviors of mega steel columns braced with inversed V bracings and X bracings are studied under the action of different axial compression ratios.

Using dual non-linearity analysis program,the numerical simulation of the coupling relationship between forces and displacements in spatial orthogonal directions are carried out,and the effect manners of loading modes on the spatial hysteretic behavior of mega steel columns are obtained.

The giant arch cable-stayed roof structure,as a new kind of structure form,is applied widely in gymnasiums.