EXPLICIT NONLINEAR TIME HISTORY ANALYSIS OF ENERGY DISSIPATION STRUCTURES BASED ON BOUC-WEN MODEL

Based on Bouc-Wen model, an explicit energy dissipator element with 2 nodes and 12 degrees of freedom was presented. The element internal forces were calculated by a modified forward Euler method. The explicit element and the algorithm for internal force calculation were developed in a nonlinear finite element analysis program with independent intellectual property rights. In order to improve the efficiency of explicit analysis, CPU+GPU heterogeneous parallel computing technology was adopted in the program. By comparing with the shear hysteretic test of low-yield-point steel, the correctness and applicability of the explicit element were verified. The explicit dissipator element was used to simulate the metal dissipator of a practical energy dissipation structure. Based on the results of structural dynamic analysis, the damping effect of the metal dissipator was discussed.