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JDR Vol.11 No.2 pp. 362-368
(2016)
doi: 10.20965/jdr.2016.p0362

Paper:

Shear Characteristics of Seismic Retrofitting Cylindrical Walls in Nuclear Power Plants

Hideyoshi Watanabe*, Hideo Ono**, Yoko Yasutomi***, and Takeshi Okamura***

*Technology Center, Taisei Corporation
344-1 Nase-cho, Totsuka-ku, Yokohama, Kanagawa 245-0051, Japan

**Design Division, Taisei Corporation, Tokyo, Japan

***Nuclear Power Division, Kansai Electric Power Co., Inc., Fukui, Japan

Received:
December 28, 2015
Accepted:
January 12, 2016
Online released:
March 18, 2016
Published:
March 1, 2016
Keywords:
nuclear power plants, shear wall, seismic retrofit, shear strength
Abstract

To improve the earthquake resistance of antiseismic cylindrical walls of existing nuclear power plants, new seismic retrofitting method is planned in which concrete is poured on one side of the wall after installing additional rebars and shear connectors, to produce a monolithic structure with increased thickness. The loading tests were carried out to verify the validity of this reinforcement method. The specimens consisted of two types: one in which the amounts of inner and outer reinforcements of the doubly arranged wall reinforcements were varied, simulating the retrofitted condition, and one for comparison, in which the inner and outer steel reinforcements were evenly distributed. The experimental results showed no substantial differences in the behaviors of the two specimens up to the ultimate state, each displaying roughly equivalent shear strength.

Cite this article as:
H. Watanabe, H. Ono, Y. Yasutomi, and T. Okamura, “Shear Characteristics of Seismic Retrofitting Cylindrical Walls in Nuclear Power Plants,” J. Disaster Res., Vol.11, No.2, pp. 362-368, 2016.
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References
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Last updated on Dec. 05, 2019