Structural Engineering and Mechanics

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Motion of rigid unsymmetric bodies and coefficient of friction by earthquake excitations

  • Published : 1994.09.25
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Abstract

Motions of an unsymmetric rigid body on a rigid floor subjected to earthquake excitations with special attention to coefficient of friction are investigated. Motions of a body in a plane are classified (Ishiyama 1980) into six types, i.e. (1) rest, (2) slide, (3) rotation, (4) slide rotation, (5) translation jump, (6) rotation jump. Based upon the theoretical and experimental research work special attention is paid to the sliding of a body. The equations of motions and the behavior of coefficient of friction in the time of floor excitation are studied. One of the features of this investigation is the introduction and estimation of the "time dependent" coefficient of friction. It has been established that the constant kinetic coefficient of friction $${\mu}(kin){\sim_\sim}0.8{\mu}(stat)$$ does not give the appropriate results. The method for the estimation of the friction coefficient variation during the time is given.

Keywords

References

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  1. Seismic Safety of Gravity Dams: From Shake Table Experiments to Numerical Analyses vol.126, pp.4, 2000, https://doi.org/10.1061/(ASCE)0733-9445(2000)126:4(518)
  2. Fractal behavior of an asymmetric rigid block overturning due to harmonic motion of a tilted foundation vol.7, pp.2, 1996, https://doi.org/10.1016/0960-0779(95)00059-3
  3. An experimental study on shaking table tests on models of a concrete gravity dam vol.19, pp.1, 2015, https://doi.org/10.1007/s12205-014-1221-8
  4. Numerical simulation of shaking table test on concrete gravity dam using plastic damage model vol.36, pp.4, 1994, https://doi.org/10.12989/sem.2010.36.4.481