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Advances in Materials Science and Engineering Volume 2020 ,2020-03-31
Fundamental Investigation on Seismic Retrofitting Method of Aging Concrete Structural Wall Using Carbon Fiber Sheet-Constitutive Law of Rectangular Section
Research Article
Kazuhiro Hayashi 1 Tomoya Matsui 1 Taiki Saito 1 Roy Reyna 2
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DOI:10.1155/2020/8451043
Received 2019-06-27, accepted for publication 2020-02-24, Published 2020-03-31
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摘要

Aging building structure has become a world problem. This problem is particularly serious in developing and underdeveloped countries. The multihazard resilience and sustainability (e.g., seismic performance) decrease at the aging building. A construction method for strengthening aging-reinforced concrete buildings by wrapping structural members with carbon fiber sheets has been proposed and implemented in recent years. Authors aim to develop a seismic retrofitting method of aging concrete structural wall with a rectangular cross section using carbon fiber sheets. In this paper, authors examined the stress-strain relationship of concrete elements with rectangular cross sections reinforced by wrapping with carbon fiber sheets. Monotonic uniaxial compression tests were performed on 21 specimens using the ratio of the long side to the short side and the ratio of the element height to the short side of the concrete cross section, the weight of the carbon fiber sheet, and the chamfer radius of section corners as variables. The tests revealed that (1) the compressive strength decreases and ultimate strain increases as the ratio of the long to short side (longitudinal ratio) of the cross section increases even in a range the ratio exceeds 2 and (2) the ratio of the element height to the short side does not significantly affect the stress-strain relationship. Furthermore, authors proposed evaluation formulas for the constitutive law of concrete elements with rectangular cross sections including the longitudinal ratio which exceeds 2 reinforced by carbon fiber sheets and confirmed that the formulas can reproduce the test results with good accuracy.

授权许可

Copyright © 2020 Kazuhiro Hayashi et al. 2020
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

通讯作者

Kazuhiro Hayashi.Department of Architecture and Civil Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan, tut.ac.jp.hayashi.kazuhiro@forest.ocn.ne.jp

推荐引用方式

Kazuhiro Hayashi,Tomoya Matsui,Taiki Saito,Roy Reyna. Fundamental Investigation on Seismic Retrofitting Method of Aging Concrete Structural Wall Using Carbon Fiber Sheet-Constitutive Law of Rectangular Section. Advances in Materials Science and Engineering ,Vol.2020(2020)

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