Shaking Table Tests of a Free-Standing Cultural Relic Strengthened by Plastic Fasteners

Abstract

Plastic fastener is a typical strengthening material for museum movable cultural relics in China.To find out strengthening effects of this material,by shaking table tests seismic responses of a ceramic relic in a 1:1 scale showcase model were studied.2 boundary conditions of the relic were considered:free-standing and strengthened by plastic fastener. By white noise excitation basic frequency of the showcase was obtained; by inputting El-centro earthquake waves of different intensities,seismic responses of both showcase and relic were studied,aseismic results of plastic fasteners were discussed. By simulation method finite element models for the showcase and strengthened relic were built,modal as well as time history analyses were carried out to validate the effectivity of shaking table tests.Results show that prominent frequency ingredients of the showcase are far greater than those of the input earthquake waves,thus the showcase is not damaged seriously; for the relic after it is strengthened by plastic fasteners,its peak displacement and acceleration response values decrease,which still embody obviously under strong earthquakes.Thus by plastic fasteners the relic can be effectively strengthened. Besides,simulation results are well in accordance with those of shaking table tests,which proves effectivity of the test method.