An efficient time-domain soil-structure interaction analysis based on the dynamic stiffness of an unbounded soil

1992 ◽  
Vol 21 (9) ◽  
pp. 787-798 ◽  
Author(s):  
Yasuhiro Hayashi ◽  
Ikuo Takahashi
Keyword(s):  
Time Domain ◽  
Soil Structure ◽  
Interaction Analysis ◽  
Dynamic Stiffness ◽  
Soil Structure Interaction ◽  
Structure Interaction

Application of 3d Time Domain Method for Seismic Soil-Structure Interaction Analysis of Spatial Grid Structure

2011 ◽  
Vol 383-390 ◽  
pp. 3713-3718
Author(s):  
Hai Shan Li ◽  
Yang Ding
Keyword(s):  
Time Domain ◽  
Soil Structure ◽  
Interaction Analysis ◽  
Time History ◽  
Element Model ◽  
Soil Structure Interaction ◽  
Grid Structure ◽  
Structure Interaction ◽  
Spatial Grid ◽  
Structure Plane

This paper proposes a direct three-dimensional (3D) numerical method in time domain for seismic soil-structure interaction (SSI) analysis of spatial grid structure. First, a finite element model including soil, foundation and typical spatial grid structure is developed. Then, the precisions of equivalent viscous-spring artificial boundary element (VSABE) and size effect of site soil region are discussed. Finally, under different site types, time history analyses for models with or without considering SSI effect are implemented respectively under horizontal seismic excitation. The results show that VSABE has the same precision as infinite element boundary and plane size of truncated soil region can be five times of structure plane size for SSI analysis of spatial grid structure. Moreover, except for hard site, it is shown that horizontal acceleration and displacement of spatial grid roof increases substantially when SSI effect is considered. Therefore, it is suggested that SSI influence should be taken into account in engineering design of spatial grid structure.

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