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Experimental and Numerical Investigation of Sliding Response of Unconstrained Objects to Base Excitations

바닥진동에 의한 비구속 물체의 거동파악 실험과 수치해석 전산프로그램의 개발

  • 이상호 (단국대학교 토목환경공학과)
  • Received : 2013.09.12
  • Accepted : 2013.12.24
  • Published : 2014.03.28

Abstract

Safety related devices unconstrained temporally in the process of operation of nuclear power plants could be damaged by the sliding during seismic activity. In this study sliding response of unconstrained objects to the base excitations is studied experimentally and analytically. In experiments static and dynamic tests to determine the coefficient of friction and the shaking table experiments to verify the sliding response of the analytic results were conducted. Numerical solutions by solving the nonlinear differential equations of motion governing sliding were found by the computer program using the step by step acceleration method. The exact solutions of the sliding response to the simple forms of base excitations were found to verify the computer program developed in this study. Relative displacement envelopes were suggested as a colliding criteria of the unconstrained objects.

Keywords

Sliding;Unconstrained Sysrem;Shaking Table;Coefficient of Friction

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