ABSTRACT
The substructuring method is advantageous to release the computation load associated with the dynamic analysis of practical structures and has been widely developed by the authors (Weng et al. 2009; Weng et al. 2011). This paper proposes a substructuring method for the analysis of a structure with local nonlinearities. The global structure is divided into a number of linear and nonlinear substructures. The linear substructures are simplified by the mode superposition technique, while the nonlinear substructures are analyzed by the improved Newmark method. The independent linear and nonlinear substructures are constrained by the displacement compatibility to recover the dynamic responses of the global structure. The effectiveness and efficiency of the new developed technique are demonstrated through the application to the system identification of a beam structure.
