Structural Engineering and Mechanics

  • 제3권2호
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  • Pages.107-120
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  • 1995
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Structural damping for soil-structure interaction studies

  • Lutes, Loren D. (Dept. of Civil Engineering, Texas A & M University) ;
  • Sarkani, Shahram (Dept. of Civil Engineering, George Washington University)
  • 발행 : 1995.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

A soil-structure interaction formulation is used here which is based on consideration of the dynamics of the structure with a free, rather than a fixed, base. This approach is shown to give a quite simple procedure for coupling the dynamic characteristics of the structure to those of the foundation and soil in order to obtain a matrix formulation for the complete system. In fixed-base studies it is common to presume that each natural mode of the structure has a given fraction of critical damping, and since the interaction formulation uses a free-base model, it seems natural for this situation to assign the equal modal damping values to free-base modes. It is shown, though, that this gives a structural model which is significantly different than the one having equal modal damping in the fixed-base modes. In particular, it is found that the damping matrix resulting in equal modal damping values for free-based modes will give a very significantly smaller damping value for the fundamental distortional mode of the fixed-base structure. Ignoring this fact could lead one to attribute dynamic effects to interaction which are actually due to the choice of damping.

키워드

참고문헌

  1. Bycroft, G.N. (1980), "Soil-foundation interaction and differential ground motions", Earthquake Engineering and Structural Dynamics, 8, pp. 397-404. https://doi.org/10.1002/eqe.4290080503
  2. Clough, R. W. and Penzien, J. (1993), Dynamics of Structures, Second Edition, McGraw-Hill.
  3. Harichandran, R. S. (1987), "Stochastic analysis of rigid foundation filtering", Earthquake Engineering and Structural Dynamics, 15, pp. 889-899. https://doi.org/10.1002/eqe.4290150709
  4. Luco, J.E. and Mita, A. (1987), "Response of a circular foundation on a uniform half-space to elastic waves", Earthquake Engineering and Structural Dynamics, 15, pp. 105-118. https://doi.org/10.1002/eqe.4290150108
  5. Scanlan, R. H. (1976), "Seismic wave effects on soil-structure interaction", Earthquake Engineering and Structural Dynamics, 4, pp. 379-388. https://doi.org/10.1002/eqe.4290040405
  6. Veletsos, A. S. and Meek, J. W. (1974), "Dynamic behavior of building foundation systems", Earthquake Engineering and Structural Dynamics, 3, pp. 121-138. https://doi.org/10.1002/eqe.4290030203
  7. Veletsos, A. S. and Prasad, A. M. (1989), "Seismic interaction of structures and soils: Stochastic approach", Journal of Structural Engineering, ASCE, 115(4), pp. 935-956. https://doi.org/10.1061/(ASCE)0733-9445(1989)115:4(935)
  8. Wolf, J. P. and Somaini, D.R. (1986), "Approximate dynamic model of embedded foundation in time domain", Earthquake Engineering and Structural Dynamics, 14, pp. 683-703. https://doi.org/10.1002/eqe.4290140502

피인용 문헌

  1. Material damping vs. radiation damping in soil–structure interaction analysis vol.33, pp.2, 2006, https://doi.org/10.1016/j.compgeo.2006.03.001
  2. Response variability of an SSI system with uncertain structural and soil properties vol.22, pp.6, 2000, https://doi.org/10.1016/S0141-0296(99)00003-6
  3. Response variability for a structure with soil–structure interactions and uncertain soil properties vol.15, pp.2, 2000, https://doi.org/10.1016/S0266-8920(99)00017-X
  4. Stochastic analysis of seismic structural response with soil-structure interaction vol.8, pp.1, 1999, https://doi.org/10.12989/sem.1999.8.1.053
  5. A Structural Design Comparison Between Two Reinforced Concrete Regular 6-Level Buildings using Soil-Structure Interaction in Linear Range vol.42, pp.1, 1995, https://doi.org/10.15446/ing.investig.v42n1.86819