- Volume 27 Issue 2
DOI QR Code
Verification of Linear FE Model for Nonlinear SSI Analysis by Boundary Reaction Method
경계반력법에 의한 비선형 SSI 해석을 위한 선형 FE 해석모델 검증
- Lee, Gye Hee (Dept. of Ocean & Plant Construction Engineering, Mokpo National Maritime University) ;
- Hong, Kwan Young (Dept. of Ocean & Plant Construction Engineering, Mokpo National Maritime University) ;
- Lee, Eun Haeng (Department of Marine and Civil Engineering, Chonnam National Univ.) ;
- Kim, Jae Min (Department of Marine and Civil Engineering, Chonnam National Univ.)
- Received : 2014.02.11
- Accepted : 2014.03.19
- Published : 2014.04.30
In this paper, a coupling scheme for applying finite element analysis(FEA) programs, such as, LS-DYNA and MIDAS/Civil, to a nonlinear soil structure interaction analysis by the boundary reaction method(BRM) is presented. With the FEA programs, the structure and soil media are discretized by linear or nonlinear finite elements. To absorb the outgoing elastic waves to unbounded soil region as much as possible, the PML elements and viscous-spring elements are used at the outer FE boundary, in the LS-DYNA model and in MIDAS/Civil model, respectively. It is also assumed that all the nonlinear elements in the problem are limited to structural region. In this study, the boundary reaction forces for the use in the BRM are calculated using the KIESSI-3D program by solving soil-foundation interaction problem subjected to incident seismic waves. The effectiveness of the proposed approach is demonstrated with a linear SSI seismic analysis problem by comparing the BRM solution with the conventional SSI solution. Numerical comparison indicates that the BRM can effectively be applied to a nonlinear soil-structure analysis if motions at the foundation obtained by the BRM for a linear SSI problem excluding the nonlinear structure is conservative.
boundary reaction method;nonlinear soil-structure interaction;perfectly matched layer;LS-DYNA;viscous boundary;MIDAS/Civil
Supported by : 지식경제부
- Basu, U. (2009) Explicit Finite Element Perfectly Matched Layer for Transient Three-dimensional Elastic Waves, Int. J. Numer. Meth. Eng., 77, pp.151-176. https://doi.org/10.1002/nme.2397
- Basu, U., Chopra, A.K. (2003) Perfectly Matched Layers for Time-harmonic Elastodynamics of Unbounded Domains: Theory and Finite-element Implementation, Comput. Methods Appl. Mech. Eng., 192, pp.1337-1375. https://doi.org/10.1016/S0045-7825(02)00642-4
- Basu, U., Chopra, A.K. (2004) Perfectly Matched Layers Transient Elastodynamics of Unbounded Domains, Int. J. Numer. Meth. Engng., 59, pp.1039-1074. https://doi.org/10.1002/nme.896
- Kim, J.M., Lee, E.H. (2013) Boundary Reaction Method For Nonlinear Soil-Structure Interaction analysis, Proc. KSCE Conference.
- Lee, E.H., Kim, J.M., Seo, C.G. (2013) Large-scale 3D SSI Analysis using KIESSI-3D Program, COSEIK J. Comput. Struct. Eng., 26(6), pp.439-445. https://doi.org/10.7734/COSEIK.2013.26.6.439
- Lee, S.H. (2006) Application of the Perfectly Matched Layers for Seismic Soil-Structure Interaction Analysis in the Time Domain, M.S. Thesis, Hawaii Univ.
- Seo, C.G., Kim, J.M. (2012) KIESSI Program for 3-D Soil-structure Interaction Analysis, Computational Structural Engineering, 25(3), pp.77-83.
- Uno, K., Shiokori, H, Kawaguchi, K., Nakanura, M. (2010) Analytical Method, Modeling and Boundary Condition for the Response Analysis with Nonlinear Soil-structure Interaction, Proc. the 14th World Conference on Earthquake Engineering, Oct. 12-17, Beijing, China.
- Liu, J., Gu, Y., Wang, Y., Li, B. (2006) Efficient Procedure for Seismic Analysis of Soil-Structure Interaction System, Tsinghua Science and Technology, Dec. 11, pp.625-631.
- LSTC (2010), LS-DYNA User's Manual, Vols. 1 & 2, Version 971 R5, May 2010
- MIDAS/Civil http://www.midasit.com/
- Evaluation of the Soil-structure Interaction Effect on Seismically Isolated Nuclear Power Plant Structures vol.20, pp.6, 2016, https://doi.org/10.5000/EESK.2016.20.6.379