Multi-Phase Model Update for System Identification of PSC Girders under Various Prestress Forces

摘要: This paper presents a multi-phase model update approach for system identification of prestressed concrete (PSC) girders under various prestress forces. First, designed on the basis eigenvalue sensitivity concept is newly proposed. Next, proposed evaluated from controlled experiments lab-scale PSC girder which forced vibration tests are performed series On girder, few natural frequencies and mode shapes experimentally measured The corresponding modal parameters numerically calculated three-dimensional finite element (FE) established target girder. Eigenvalue sensitivities analyzed potential model-updating FE model. Then, structural subsystems identified phase-by-phase using procedure. Based results, relationship between forces to evaluate influence subsystems.