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Contact interface fiber section element: shallow foundation modeling

  • Limkatanyu, Suchart (Department of Civil Engineering, Faculty of Engineering, Prince of Songkla University) ;
  • Kwon, Minho (Department of Civil Engineering, ERI, Gyeongsang National University) ;
  • Prachasaree, Woraphot (Department of Civil Engineering, Faculty of Engineering, Prince of Songkla University) ;
  • Chaiviriyawong, Passagorn (Department of Civil Engineering, Faculty of Engineering, Prince of Songkla University)
  • 투고 : 2011.08.11
  • 심사 : 2012.06.15
  • 발행 : 2012.09.25

초록

With recent growing interests in the Performance-Based Seismic Design and Assessment Methodology, more realistic modeling of a structural system is deemed essential in analyzing, designing, and evaluating both newly constructed and existing buildings under seismic events. Consequently, a shallow foundation element becomes an essential constituent in the implementation of this seismic design and assessment methodology. In this paper, a contact interface fiber section element is presented for use in modeling soil-shallow foundation systems. The assumption of a rigid footing on a Winkler-based soil rests simply on the Euler-Bernoulli's hypothesis on sectional kinematics. Fiber section discretization is employed to represent the contact interface sectional response. The hyperbolic function provides an adequate means of representing the stress-deformation behavior of each soil fiber. The element is simple but efficient in representing salient features of the soil-shallow foundation system (sliding, settling, and rocking). Two experimental results from centrifuge-scale and full-scale cyclic loading tests on shallow foundations are used to illustrate the model characteristics and verify the accuracy of the model. Based on this comprehensive model validation, it is observed that the model performs quite satisfactorily. It resembles reasonably well the experimental results in terms of moment, shear, settlement, and rotation demands. The hysteretic behavior of moment-rotation responses and the rotation-settlement feature are also captured well by the model.

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참고문헌

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