Special metals for seismic retrofitting of steel buildings

Abstract

Novel metals such as aluminium alloys, stainless steels and shape memory alloys can be used for the retrofitting of steel buildings in seismic areas. Therefore, it is useful to investigate their mechanical and physical properties along with the key issues of the material modelling. The present paper focuses on the mechanical response of such metals which are inherent to the seismic design. Furthermore, it compares their mechanical characteristics in order to assess (i) the relative merits; and (ii) the cost‐effectiveness in practical applications. Analytical formulations employed for either refined or simplified modelling are critically reviewed; advantages and disadvantages of each scheme are highlighted. Finally, several examples of practical applications of these novel metals in seismic retrofitting are discussed and further developments outlined. Copyright © 2003 John Wiley & Sons, Ltd.

Multifunctional Non‐Equiatomic High Entropy Alloys with Superelastic, High Damping, and Excellent Cryogenic Properties

“…The CR97.5 sample with the strongest recrystallization texture shows the largest superelastic strain of 0.025, which is similar to that of the Ti–Nb‐based superelastic alloys . The comparison of yield stress in different alloy systems is presented in Figure b . The current non‐equiatomic NCATB‐HEA exhibits the highest yield stress among all the superelastic alloys.…”

“…The amount of energy can be calculated as the area enclosed by the hysteresis loop in the stress–strain curves. Figure shows the energy absorbed in a single superelastic “loading‐unloading” cycle for NCATB‐HEA, in comparison to polycrystalline NiTi, Cu–Al–Ni, and Fe–Mn–Al–Ni alloys . The largest energy absorbed by one superelastic cycle for NCATB‐HEA with tensile strain of 0.04 is over 15 MJ m −3 , which is as large as that in the NiTi alloy with applied strain of 0.06, nearly four times larger than that in the Fe–Mn–Al–Ni alloy, and nearly 10 times larger than the Cu–Al–Ni alloy.…”

Stability and ductility of high performance steel sections with concrete infill

“…Di Sarno et al [18] and Di Sarno and Elnashai [19] have also recently shown that the use of stainless steel can provide up to 3 times the ultimate strain than carbon steels and they can exhibit improved post-local buckling giving them excellent application in seismic regions both for new structures and as braces for rehabilitating structures.…”

Seismic retrofitting of framed structures with stainless steel

“…weak-beam, strong-column response for moment resisting frames, whereby the column is designed not for the applied action but for action consistent with the over-strength of the beam. (iv) SS generally exhibits rather greater increases in strengths at fast rates of loading [5,9]. The initial stress state of the material has an effect on the strain rate.…”

“…Innovative metal materials that can be used for retrofitting of steel structures are aluminium alloys, shape memory alloys, and stainless steels. These metals possess unusual characteristics that render them suitable in the field of seismic rehabilitation [5]. These characteristics include The present work analyses the feasibility of the application of SSs for seismic retrofitting of steel structural systems for multi-storey buildings.…”