STRUCTURE ELASTO-PLASTIC SEISMIC RESPONSE ANALYSIS BY DIFFERENTIAL QUADRATURE METHOD
Differential quadrature method(DQM) is a numerical approach to solve differential equations with high accuracy and high computation efficiency.And it is applied to finish structural elasto-plastic seismic response analysis.According to the properties of a structural elasto-plastic seismic response analysis,the increment distribution of a seismic acceleration in a sampling period is assumed as a liner distribution.DQM is applied by using a new non-equal time grid.A simple and non-direct procedure is used for the treatment of critical points;it can utilize the normal methods for treating critical points conveniently.Numerical experiments are carried out.The results show that it can gather high accuracy by using DQM to analyze the structural elasto-plastic seismic responses.And the efficiency can be improved in two ways.