포물선형 띠기초의 자유진동 해석

Free Vibration Analysis of Parabolic Strip Foundations

  • 이태은 (원광대학교 에너지.환경.건설연구센터) ;
  • 이종국 ((주)경흥산업) ;
  • 강희종 (원광대학교 대학원 토목환경공학과) ;
  • 이병구 (원광대학교 토목환경공학과)
  • 발행 : 2005.05.01

초록

Since soil structure interactions are one of the most important subjects in the structural/foundation engineering, much study concerning the soil structure interactions had been carried out. One of typical structures related to the soil structure interactions is the strip foundation which is basically defined as the beam or strip rested on or supported by the soils. At the present time, lack of studies on dynamic problems related to the strip foundations is still found in the literature. From these viewpoint this paper aims to theoretically investigate dynamics of the parabolic strip foundations and also to present the practical engineering data for the design purpose. Differential equations governing the free, out o plane vibrations of such strip foundations are derived, in which effects of the rotatory and torsional inertias and also shear deformation are included although the warping of the cross-section is excluded. Governing differential equations subjected to the boundary conditions of free-free end constraints are numerically solved for obtaining the natural frequencies and mode shapes by using the numerical integration technique and the numerical method of nonlinear equation.

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