EXPERIMENTAL VERIFICATION OF SEISMIC PERFORMANCE OF RC BRIDGE PIERS REPAIRED WITH ARMID FIBER REINFORCED PLASTIC SHEET WRAPPING AFTER EARTHQUAKE DAMAGE

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  • 被災損傷後にアラミド繊維シート巻き立て補修したRC橋脚の耐震性能に関する実験的検証

Abstract

<p> Cyclic loading tests on the reinforced concrete bridge pier models repaired after damage were conducted to evaluate the seismic performance of reinforced concrete bridge piers after repaired damaged due to earthquake. The bridge piers in this study do not satisfy current seismic performance. In this study, cyclic loading was conducted to damage the column bases of the model, at first. The damage level was set to a level at which the bridge functionality could be restored as soon as possible through repair. And, the model was repaired, in which injecting resin into the cracks and jacketing them with aramid fiber reinforced plastic sheet. Then, cyclic loading test was conducted again to evaluate the seismic performance of the repaired the model. From this study, the following results were obtained: (1) toughness is improved in the pier model repaired after the damaged; (2) energy absorption performance was also improved; (3) the horizontal load-carrying capacity of the pier model satisfied the seismic horizontal strength of specifications for road bridges;(4) at the damage levels given in this experiment, the current seismic performance could be maintained even with post-damage repairs.</p>

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