Three dimensional elasto-dynamic infinite elements for soil-structure interaction analysis = 지반-구조물 상호작용 해석을 위한 3차원 동적 무한요소

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This dissertation studied a soil-structure interaction analysis(SSI) method for a three dimensional body subject to dynamic loadings using a direct approach incorporating 3D infinite element formulations. Two kinds of 3D dynamic infinite elements(IEs) were developed to model the far fielding the SSI problems. They are cuboidal & radial infinite elements. For the cases of the cuboidal IEs, the interface shapes between the near and far field zone must be rectangular parallelepiped. Five kinds of cuboidal IEs were developed as horizontal(HIE), horizontal corner(HCIE), vertical(VIE), vertical corner(VCIE) and vertical-horizontal corner(VHCIE) infinite elements. They contain wave functions considering multi-wave components in layered soil media. The wave numbers were modified in conformity of the Cartesian coordinates. For the cases of radial IEs, arbitrary shaped interface may be taken the near field zone and far field zones. More practical model technique can be applied, using the three kinds of radial IEs, named as HIE, VIE and CIE. The wave functions also include the multiple wave components. The wave functions of the proposed infinite elements were derived from the approximate expressions for analytical solutions. An efficient integration scheme was also applied to construct mass and stiffness matrices of the infinite elements involving multi-wave components. To verify the proposed IEs, non-dimensional compliances and impedances function of various rigid surface footings were calculated for cases on a homogeneous half space and on a layered half space. Numerical results compared with those using other methods indicated that the method based on the proposed infinite elements offers good solutions. The SSI analyses were also carried out for a disk on a flexible caisson embedded in a homogeneous half space. The CPU time for numerical analysis can be reduced significantly compare with SASSI analysis. The present earthquake analysis method was verified utilizi...
Advisors
Yun, Chung-Bangresearcher윤정방researcher
Description
한국과학기술원 : 건설및환경공학과,
Publisher
한국과학기술원
Issue Date
2007
Identifier
268653/325007  / 020015841
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 건설및환경공학과, 2007. 8, [ ix, 139 p. ]

Keywords

infinite element; soil-structure interaction; wave propagation; multiple soil layers; 무한요소; 지반-구조물 상호작용; 파동전달; 적층지반; infinite element; soil-structure interaction; wave propagation; multiple soil layers; 무한요소; 지반-구조물 상호작용; 파동전달; 적층지반

URI
http://hdl.handle.net/10203/30590
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=268653&flag=dissertation
Appears in Collection
CE-Theses_Ph.D.(박사논문)
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