Online explicit model updating of nonlinear viscous dampers for real time hybrid simulation

Real-time hybrid simulation (RTHS) is a testing method by which structural system divided into analytical and experimental substructures. This paper proposes methodology to conduct RTHS for structures that use passive nonlinear viscous dampers (NLVDs), some of are physically tested in the substructure others via online model updating (OMU). The proposed uses response modelled NLVD improve prediction numerically NLVDs. An explicit solution constitutive relations Nonlinear Maxwell Model (NLMM) perform non-iterative real-time state determination damper using NLMM. performed Unscented Kalman Filter (UKF). two-story reinforced concrete structure subjected strong earthquake ground motions (including both near-field far-field recorded records) validate procedure.