Applications of a reduction method for reanalysis to nonlinear dynamic analysis of framed structures

摘要: This paper is concerned with the nonlinear dynamic analysis of framed structures using a reduction method recently proposed by authors. The originally devised for structural static reanalysis and has been applied in optimal design to speed up process. For structures, incremental or iterative equations motion can be transformed into an algebraic system if appropriate integration methods such as Newmark's are used integrate motion. resulting system, referred effective this paper, changes during simulation problem. Therefore, from point view solving systems equations, problem very similar that both types problems. Hence, any technique readily carry out structures. As demonstrated presented numerical examples, response obtained adopted accurate Cholesky method, estimated operation counts involved it more efficient than when half-band width greater about 50.