AN IMPROVED METHOD OF THE CALCULATION OF EQUIVALENT NODAL FORCES IN VISCOUS-ELASTIC ARTIFICIAL BOUNDARY

• DOI: 10.6052/0459-1879-16-070
• Publication Date: 2016-09-15
• Authors: Xiaolong Zhang; Xiaojun Li; Guoxing Chen; Zhenghua Zhou

The viscous-elastic artificial boundary is widely used in the analysis of site seismic response and dynamic structure-soil system interaction problems. Seismic input usually taken as equivalent nodal forces incorporating boundary, stress control area any node conventional method considered uniform distribution. However, its distribution actually uneven. An improved proposed for wave propagation scattering problem infinite domain. In method, an first introduced; to be incorporated directly these local boundaries, force obtained using mesh refinement process combining integration adjacent regions changed along nodes, computation error effectively reduced; two-dimensional time-domain then solved explicit finite element method. numerical simulation models with various sizes incidence angles are presented demonstrate performance this paper. simulating nephogram values displacement show that calculating precision closely related size angle, increases decrease angle. result also shows significantly higher than case same