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<doi>MS-11-168-cd</doi>

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<article-title> IMPROVEMENT ON RESILIENCE OF BRIDGE STRUCTURE BY RC COLUMN, EXHIBITING SELF-CENTERING MECHANISM ONLY DURING THE RECOVERY PHASE</article-title>
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<author>K.Uemura<sup>1</sup>, and Y. Takahashi<sup>1</sup></author>

<aff><sup>1</sup>Department of Civil and Earth Resources Engineering, Kyoto University, Japan</aff>


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<title>ABSTRACT</title>
<p></p><p>To improve resilience of bridge structure, self&#45;centering columns have been widely studied as a column structure with high recovery performance. However, self&#45;centering columns have poor seismic energy absorption performance, which increases the seismic response. In this paper, we propose a new reinforced concrete column exhibiting the self&#45;centering mechanism only during the recovery phase, in order to achieve both high recovery performance and energy absorption performance. In the proposed RC column, a concrete hinge with a self&#45;centering capacity is embedded. The self&#45;centering capacity of the concrete hinge in the RC column appear during the removal of RC members that have been plasticized by earthquakes. In this study, cyclic loading tests were conducted for the proposed concrete hinge with a self&#45;centering capacity and the RC column with embedded the concrete hinge. The results showed that the proposed concrete hinge had a stable self&#45;centering capacity and that the performance of the concrete hinge can be maintained even when it was embedded inside the RC columns. In addition, the RC column with embedded concrete hinge wad confirmed to have higher energy absorption performance than conventional self&#45;centering column. Therefore, it was found that the proposed RC column has high recoverability and energy absorption performance.</p><p><italic> Keywords:</italic> Resilience, Reinforced-concrete, Self-centering, Recovery</p></abstract>
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<hpdf>MS-11-168</hpdf>

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