Steel and Concrete Structures

Hardness is experienced on damages to structures with lower period.

Specialists have constantly been attempting at designing building structures in which the strength of steel is increased so conversely the thickness is reduced, hence it leads to weight reduction of structures that in turn will result in production of more economical steel.

Meanwhile, the increase in steel strength is not always a desired and beneficial property, as in some structures the strength is reduced as much as possible in order to meet the required flexibility. In these structures that the imposed energy is to be absorbed by non-linear behavior, it’s suggested to use low-yield or easy going steel that is in abbreviation is known as EGS 100 or Y.P 100.

The most ideal method in building design is to merely change earthquake-resistant structures after the earthquake and maintain the function of the building. The results of studies show that the application of mild steel provides the opportunity for innovation of new design methods to reach this purpose.  The results of studies also indicate that the application of mild steel leads to increase of cutting stiffness, energy penetration, and stability of structure with different types of earthquake-resistant systems including bracing, steel shear walls, etc. In addition, it also directs energy of earthquake to parts of the structure in order to amortize energy. Results of the studies about combination of mild steel application and plate-frame interaction theory in steel shear walls show that mild steel application causes to gain drift of about 5% in the building.

According to researchers conducted by the co-operation of MSC Co., the mentioned steel with the following specification yield point: 80-120, UTS: 200-300MP and elongation 50 % was produced and its behavior was analyzed in different structures.