Seismic Performance of New Type Steel-Concrete Composite Structures Considering Characteristic both SRC and CFT Structures

Abstract eng:
From the situation of a recent construction cost, the demand for ordinarily SRC structures decreases. This factor is that the excellent mechanical property of SRC structures cannot be demonstrated. It is because the steel is used, it is higher than that of RC structures on both sides of the material and construction. Then, it is researching the steel-concrete composite structures of new systems as a structure to have the earthquake-resistant, the workability, and the economy. This new type steel-concrete structure with advantage of RC structures is the best use of the characteristic of SRC structures and CFT structures. To obtain the seismic performance of new system of composite structure, 6 columns specimens (Hereafter, it is called B series) were tested. Steel-concrete composite columns have "diagonal steel section" and "steel plate boxes shape section (Hereafter, it is called the box shape steel pipe) had only to the top and the bottom of columns". New type composite columns with diagonal section have about twice the bending yield strength with ordinarily section. And, it has the deformation capacity. It obtained of the basic characteristic of new type steel-concrete composite structures, and the evaluation of ultimate strength and ductility of steel-concrete columns is examined. In conclusion, steel-concrete composite structures of proposed new type have been understood that it has seismic performance and economical construction be done compared with ordinarily SRC structures and CFT structures.

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