A dual-energy-demand-indices-based evaluation procedure of damage-control frame structures with energy dissipation fuses

Abstract

The primary objective of this research is to extend energy balance concept in seismic behavior evaluation of low-to-medium rise frame systems with energy dissipation fuses dominated by racking deformations. At its core, energy demand indices under ground motions considering both peak responses and cumulative responses are quantified to develop a dual-energy-demand-indices-based procedure for damage-control behavior evaluation. Firstly, based on the experimentally validated hysteretic feature and representative ground motion ensembles, a parametric study is conducted considering the demand indices of the energy factor and the cumulative ductility. Results of the indices distribution and dispersion are presented in detail. Subsequently, a stepwise procedure that accounts for the peak demand and the cumulative demand is constructed. Then, the procedure is applied in prototype structures for validation. Results indicate that the consideration of dual energy demand indices is necessary for evaluation of systems with fuses, and these indices are influenced by structural nonlinear parameters and ground motions properties. The procedure based on the dual energy demand indices can be used to evaluate the structural damage-control behavior with satisfactory accuracy considering the peak response, the cumulative response, and the energy distribution along stories.

Shape memory alloy plates: Cyclic tension-release performance, seismic applications in beam-to-column connections and a structural seismic demand perspective

“…β) leads to increasing strength reduction factor, and the inelastic seismic demands may also be mitigated. It is worth noting that the effect of post-yield stiffness ratio on the strength reduction factors and the dispersion properties was also in line with bilinear kinematic SDF systems examined in the literature [50]. The feasibility of modulating the seismic demands of flag-shaped SDF systems by adjusting the hysteretic parameters was also confirmed by previous analyses [43].…”

Damage-control steel frames equipped with SMA connections and ductile links subjected to near-field earthquake motions: A spectral energy factor model

“…5b. In general, it can be seen that the influence of the post-yielding stiffness ratio and the ductility on the energy factor of partially self-centring SDF systems is in line with the bilinear kinematic SDF systems [36]. The reasons for the observed phenomena have also been discussed in [37].…”

Integrated Assessment of Basin Effects on Seismic Damage: A Coupled 3D SEM-FEM Approach with Domain Reduction Method

“…loss of the capacity of a structural member) resulting from complex nonlinear deformation or energy dissipation, to a unique point in the monotonic skeleton curve. The most used indicators compute the ductility (Krawinkler et al, 2003;Farrow and Kurama, 2003), eigen-frequency drop-off (Stocchi and Richard, 2019) or plastic energy (Ke et al, 2017). For the sake of brevity, in this case the structural response is evaluated by quantifying a inelastic seismic demand index, namely the plastic energy dissipation (W P ).…”