Sajad Hamedi Shahraki
Mobarakeh Steel Company, Iran
Title: Experimental study of low yield point steel, and benefits of using easy-going-steel in lateral load resisting systems
Biography
Biography: Sajad Hamedi Shahraki
Abstract
Laboratory methods are always the most reliable and important methods for studying the seismic performance of under-load structures. 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 structures, in which the imposed energy is to be absorbed by non-linear behavior, it’s suggested to use low-yield or easy-going steel known as EGS 100 or Y.P 100 in abbreviation. Proving the theory of the use of low-yield-point steel in lateral load resisting systems, several experiments were conducted around the world among which the most important one carried out on the seismic performance of cross-linked bracing systems, which is discussed in this paper. In this paper, three samples were tested to evaluate the effects of low-yield-point steel on the lateral load resisting systems in cross-linked bracing method. The object of these experiments was mainly to investigate the idea of using more flexible steel to improve the behavior of cross-linked bracing systems. Research results show that the use of mild steel makes it possible to devise design methods to improve steel behavior in structures. These findings also show that the use of mild steel increases the shear stiffness, energy absorption and structural stability with a variety of earthquake resistant systems, such as bracing, steel shear walls, and so on. In addition, it provides an opportunity for better direction of earthquake forces to parts of the structure which absorb and nullify energy.