Further insights of a composite implicit time integration scheme and its performance on linear seismic response analysis

In this work, some further insights of a composite implicit time integration scheme proposed by Wen et al. are presented. The local truncation error of the proposed scheme is first derived, and analytical accuracy solution is thus acquired as well as the optimal value of algorithmic parameter. The influence of approximate loads on computation accuracy of the proposed scheme is quantified by local truncation errors. More detailed analysis is conducted to demonstrate the desirable performance of the proposed scheme on accuracy, stability and numerical dissipation properties. The calculation procedure of the presented scheme for seismic response is proposed. Numerical examples demonstrate the presented scheme possesses desirable accuracy and efficiency for seismic response analysis when compared with other representative schemes.