Pure aluminium shear panels as dissipative devices in moment‐resisting steel frames

Abstract

The use of energy dissipation systems for the seismic control of steel structures represents a valid alternative to conventional seismic design methods. The seismic devices currently employed are mostly based on the metallic yielding technology due to the large feasibility and efficiency they can provide. Within this context, in the current paper an innovative solution based on the adoption of low-yield-strength pure aluminium shear panels (SPs) for seismic protection of steel moment-resisting frames is proposed and investigated. In order to prove the effectiveness of the system, a wide numerical study based on both static and dynamic non-linear analyses has been carried out, considering a number of different frame-to-shear panel combinations, aiming at assessing the effect of the main influential parameters on the seismic response of the structure. The obtained results show that the contribution provided by aluminium SPs is rather significant, allowing a remarkable improvement of the seismic performance of the structure in terms of stiffness, strength and ductility, with the possibility to strongly limit the damage occurring in the members of moment-resisting frames. In particular, it is clearly emphasized that the stiffening effect provided by SPs allows a more rational design procedure to be adopted, since the serviceability limit state check does not lead to unavoidable and uneconomical increase of the size of main structural members.

Low yield metal shear panels as an alternative for the seismic upgrading of concrete structures

“…Moreover, in order to avoid shear buckling phenomena of the selected panel, appropriate stiffeners have been used. The stiffeners have a rectangular cross-section with the same thickness of the steel plate [12]. In particular, 3 longitudinal and 11 transversal stiffeners have been alternatively placed on the two surfaces of the panel, defining in this way 300 · 300 mm plate fields.…”

“…Low yield steel shear panels could be very effective for this purpose because they allow the plastic deformation to be spread throughout the entire surface of the device rather than to be concentrated in a limited portion as it happens for many other systems [1,2]. Recently, a wide numerical and experimental research has been undertaken at the Department of Structural Analysis and Design of the University of Naples ''Federico II'' in order to investigate the energy dissipation capacity of shear panels made of either low-yield steel or pure aluminium and suitably reinforced by ribs to prevent shear buckling both in the elastic and plastic field [3,4].…”

Approximate method of estimating seismic performance of high‐rise buildings with oil‐dampers

“…This improvement has little impact on the occupied spaces of the building. Recently, the performance of oil‐dampers and various dampers has made striking progress, as given in literature Use of external oil‐dampers …”

“…Recently, the performance of oil-dampers and various dampers has made striking progress, as given in literature. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] (4) Use of external oil-dampers This method, which is newly proposed in this paper, involves installing oil-dampers on the outside of an existing high-rise building (external oildampers) to mitigate the dynamic response produced by long-period ground motions. Little change to the facade of the existing high-rise building is required.…”

Review on Web Buckling and Hysteretic Behavior of Shear Panel Dampers

“…Stress-strain Curve of Low Yield Point Steel [18] Aluminum is an innovative material recently proposed in the field of seismic engineering, due to its low yield strength and high ductility features [19,20]. Table 2 shows the mechanic characteristics of low yield point steel, aluminum and pure aluminum.…”