Displacement-based seismic design for buildings installed hysteretic dampers with hardening post-yielding stiffness

Abstract

Passive energy dissipation devices have been proved to be effective and low-cost means of structural control, and a variety of dampers have been developed over the past decades. Hysteretic dampers with hardening post-yielding stiffness have multiphased energy dissipation characteristics because of their hardening behavior, which can compensate for stiffness loss and postpone the collapse of damaged structures. In this article, a hysteretic model is proposed for hysteretic dampers with hardening post-yielding stiffnesses, and a formula is derived for equivalent yield strength expressed by the additional damping of the structure. A procedure is developed for displacement-based seismic design that transforms the relatively complex damping into an acceptable yield strength. A numerical example is only presented for demonstrating the design process and simply validating the proposed method. The results show that the proposed procedure is easy to implement and could produce adequate hysteretic dampers with hardening post-yielding stiffness hardening behavior. The maximum displacement responses of the existing structure retrofitted using the proposed procedure satisfy the expected performance objective well. Thus, this procedure could be an alternative to seismic retrofitting for structures with energy dissipation systems.

Nonlinear hysteretic parameter identification using improved artificial bee colony algorithm

“…Usually, hysteretic components can be used into the structural for seismic isolation (Li et al, 2019;Xu et al, 2018). In this example, two bilinear hysteretic components with kinematic hardening as in Section 2.1 are invoked and their connection to the frame structure is schematically shown in Figure 18.…”

Evaluation of seismic collapse resistance of reinforced concrete frames designed with nonlinear viscous dampers

“…In the case of retrofitting or upgrading of an existing structure for increased seismic fortification requirement, the use of dampers is a preferred choice as it usually does not require significant changes to the structure itself. Due to a wide range of applications, considerable progress has been made in the development of different kinds of dampers, such as metal dampers [1][2][3], fluid viscous dampers [4,5], viscoelastic dampers [6], and friction dampers [7][8][9][10]. With the standardization of the production and application of seismic dampers, modern seismic design codes [11][12][13] have now allowed the incorporation of the effect of seismic dampers into a new design so that the structure can be made lighter and with less amount of steel reinforcement, and this in turn improves the structural efficiency which is increasingly important in the era of low carbon construction.…”

Displacement-based determination of BRBs in retrofitting an RC frame building

“…Kalavasilis et al (2007Kalavasilis et al ( , 2008 proposed a design method of BRBs using ductility based method. Li et al (2019) developed a DB seismic design procedure that transforms the damping into an acceptable yield strength. However, direct DB design studies that relates the multi-performance to the hysteretic property modeling of the retrofit elements, are still few.…”