동적 무한요소를 이용한3차원 지반-구조물 상호작용계의 지진응답해석
Seismic Response Analysis for Three Dimensional Soil-structure Interaction System using Dynamic Infinite Elements
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초록
본 연구에서는 지반-구조물 상호작용을 고려한 3차원 지반-구조계의 지진응답 해석을 수행하고 그 기법의 적용성과 타당성을 검토한다. 이를 위해 구조물과 구조물 주변의 근역지반을 3차원 유한요소로서 모델링하고 원역지반에 대해서는 기 개발한 3차원 동적 무한요소를 적용한다. 모든 입사 성분 P, SV 그리고 SH파가 고려되었을 때, 등가 지진하중은 무한요소에 의해 구해진 무한 지반의 동적 강성과 자유장 해석을 통해 구해진 지반의 응력과 변위응답을 이용하여 구해진다. 검증 및 적용 예제는 적층 자유장의 지반응답해석과 전형적 원자로 격납건물의 지반-구조물 상호작용을 고려한 층응답 스펙트럼을 구하는 것으로 하였다. 해석 결과는 다른 기법에 의해 구해진 값들과 비교하였으며, 본 기법의 정확성과 정밀성을 확인할 수 있다.
Abstract
This paper presents a seismic analysis technique for a 3D soil-structure interaction system in a frequency domain, based on the finite element formulation incorporating frequency-dependent infinite elements for the far field soil region. Earthquake input motions are regarded as traveling P, SV and SH waves which are incident vertically from the far-field soil region, and then equivalent earthquake forces are calculated using impedances of infinite soil by dynamic infinite elements and traction and displacement from free field response analysis. For verification and application, seismic response analyses are carried out for a multi-layered soil medium without structure and a typical nuclear power plant in consideration of soil-structure interaction. The results are compared with the free field response using a one-dimensional analytic solution, and a dynamic response of an example structure from another SSI package.
참고문헌 (21)
- White, W., "Unified boundary for finite dynamic model", Journal of Engineering Mechanics Division ASCE, 103, pp.160~174 (1969)
- Tassoulas, J.L., "Elements for the numerical analysis of wave motion in layered media", International Journal for Numerical Method in Engineering, 19, pp.1005~1032 (1983)
- Luco, J.E., "Impedance functions for a rigid foundation on a layered medium", Nuclear Engineering & Design, 31, pp.204~217 (1974)
- Chen, C.H., "Dynamic modeling of axisymmetric foundation", Earthquake Engineering and Structure Dynamics, 14, pp.823~840 (1986)
- Medina, F., "Infinite elements for elasto-dynamics", Earthquake Engineering and Structure Dynamics, 10, pp.699~709 (1982)
- Lysmer, J., "SASSI: A System for Analysis of Soil-Structure Interaction, User’s Manual" (1988), University of California
- Lysmer, J., "FLUSH - A computer program for approximate 3-D analysis of soil-structure interaction problems" (1975), University of California
- Yun, C.B., "User’s manual of KIESSI program for 2D, AXI and 3D fluid-soil-structure interaction system" (2007), Dynamic structural Lab
- Rajapakse, R.K.N.D., "An efficient elastodynamic infinite element", International Journal of Solids and Structures, 22, pp.643~657 (1986)
- Zhao, C., "A dynamic infinite element for three-dimensional infinite-domain wave problems", International Journal for Numerical Method in Engineering, 36, pp.2567~2580 (1993)
- Yang, Y.B., "Frequency-independent infinite elements for analyzing semi-infinite problems", International Journal for Numerical Method in Engineering, 39, pp.3553~3569 (1996)
- Yang, S.C., "Axisymmetric infinite elements for soil-structure interaction analysis", Engineering Structures, 14, pp.361~370 (1992)
- Yun, C.B., "Axisymmetric elastodynamic infinite elements for multi-layered half-space", International Journal for Numerical Method in Engineering, 38, pp.3723~3743 (1995)
- Yun, C.B., "Analytical frequencydependent infinite elements for soil-structure interaction analysis in two-dimensional medium", Engineering Structures, 22, pp.258~271 (2000)
- Choi, J.S., "Earthquake response analysis of the Hualien soil-structure interaction system on based updated soil properties using forced vibration test data", Earthquake Engineering and Structural Dynamics, 30, pp.1~26 (2001)
- Seo, C.G., "Three-dimensional frequency dependent infinite elements for soil-structureinteraction", Engineering Structures, 29, pp.3106~3120 (2007)
- Yun, C.B., "Dynamic infinite elements for soil-structure interaction analysis in a layered soil medium", International Journal of Structural Stability and Dynamics, 7, pp.693~713 (2007)
- 서춘교, "방사형 3차원 동탄성 무한요소", 대한토목학회 논문집A, 27(5A), pp.701~711 (2007), 대한토목학회
- Zhao, C., "An efficient wave input procedure for infinite media", Communications in Numerical Methods in Eng, 9, pp.407~415 (1993)
- Schnabel, P.B., "SHAKE91 -- A computer program for earthquake response analysis of horizontally layered sites" (1991), Earthquake Engineering Research Center
- Bechtel Power Corporation, "Computer program CE933 (FASS): Fourier Analysis of Soil-Structure System", CA