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Journal Articles

The Effect of rehydration on bond strength of reinforced concrete subjected to high temperature

Miyabe, Azusa*; Koyama, Taku*; Nishio, Yuhei*; Suzuki, Hiroshi; Kanematsu, Manabu*

Konkurito Kozobutsu No Hoshu, Hokyo, Appuguredo Rombun Hokokushu (CD-ROM), 19, p.59 - 64, 2019/10

no abstracts in English

Journal Articles

Evaluation of deformation and fracture behavior of reinforced concrete using neutron beam technique

Ueno, Kazuki*; Suzuki, Hiroshi; Koyama, Taku*; Nishio, Yuhei*; Kanematsu, Manabu*

Konkurito Kozobutsu No Hoshu, Hokyo, Appuguredo Rombun Hokokushu (CD-ROM), 18, p.647 - 650, 2018/10

no abstracts in English

Journal Articles

Novel bond stress evaluation technique using neutron diffraction

Suzuki, Hiroshi; Kusunoki, Koichi*; Kanematsu, Manabu*; Mukai, Tomohisa*

Konkurito Kozobutsu No Hihakai Kensa Shimpojiumu Hobunshu, 6, p.343 - 348, 2018/08

no abstracts in English

Journal Articles

Verification on recovery performance of repaired reinforced concrete using neutron beam technology

Sekine, Mariko*; Suzuki, Hiroshi; Kanematsu, Manabu*

Konkurito Kogaku Nenji Rombunshu (DVD-ROM), 40(1), p.1545 - 1550, 2018/07

no abstracts in English

Journal Articles

Non-destructive bond stress evaluation of bending and shear deformed reinforced concrete structure using neutron diffraction

Suzuki, Hiroshi; Kusunoki, Koichi*; Satake, Kosuke*; Kanematsu, Manabu*; Koyama, Taku*; Niwa, Akinobu*; Kabayama, Kenji*; Mukai, Tomohisa*; Kawasaki, Takuro; Harjo, S.

Hihakai Kensa, 67(4), p.180 - 186, 2018/04

The bond behavior between rebar and concrete under bending moment was investigated by measuring the stress distribution in the two-dimensionally distributed rebars embedded in the reinforced concrete (RC) beam using neutron diffraction. The stress distributions in both of the main rebar and the transverse stirrups embedded in concrete were successfully measured at the fixed measurement configuration without any sample rotations, by suggesting a simple measurement technique on the premise that the transverse restriction from the surrounding concrete to the main rebar is negligible. The bending and shear fracture behavior of the RC beam specimen was predicted by comparing changes in the stress distribution in the rebars measured by neutron diffraction with respect to the applied stress, with the macroscopic deformation measured by strain gauges fixed on the concrete surface. In this study, it was found that the neutron diffraction technique can be a useful technique to evaluate not only the anchorage performance but also the bending behavior of the RC beam.

Journal Articles

Nondestructive measurement of bond stress distribution of reinforced concrete using neutron diffraction

Suzuki, Hiroshi; Kusunoki, Koichi*; Kanematsu, Manabu*; Mukai, Tomohisa*

Konkurito Kozobutsu No Hoshu, Hokyo, Appuguredo Rombun Hokokushu, 17, p.179 - 184, 2017/10

no abstracts in English

Journal Articles

Structural engineering studies on reinforced concrete structure using neutron diffraction

Suzuki, Hiroshi; Kusunoki, Koichi*; Kanematsu, Manabu*; Mukai, Tomohisa*; Harjo, S.

Materials Research Proceedings, Vol.2, p.25 - 30, 2017/00

 Times Cited Count:1 Percentile:46.32

It has been demonstrated in our past studies that neutron diffraction can be an alternative method to conventional strain gauge for measuring the stress distribution along rebar embedded in concrete. The current study investigated the possibility of the bond stress evaluation using neutron diffraction in order to find further capability of neutron diffraction for the structural engineering study on the reinforced concrete structure. Several peaks appeared in the bond stress distribution measured by neutron diffraction, showing the inhomogeneous bond variation along the embedded rebar. This result suggests that the neutron diffraction technique with high spacial resolution makes it possible to catch local bond resistance caused by the transverse ribs. The bond stress distribution measured by the neutron diffraction technique is expected to bring detailed understanding of the bond mechanism between rebar and concrete for the reinforced concrete structure.

Journal Articles

Seismic simulations for performance based monitoring of frame structures

Atanasiu, G. M.*; Hazama, Osamu; Guo, Z.; Yagawa, Genki*

Proceedings of 2nd International Conference Lifetime Oriented Design Concepts (ICLODC 2004), p.449 - 458, 2004/03

Some strategies in monitoring the structural seismic performance for a class of RC multistory buildings using linear and nonlinear dynamic analysis. New concepts and visions, considering the seismic input models based on probabilistic hazard level, will be presented. Numerical simulations of RC structures with different topologies are carried out as case studies, to search for a suitable strategy of seismic monitoring based on structural performance. For comparison, equivalent single degree of freedom models are also taken into account. The seismic input is based on the 1994 Northridge earthquake acceleration time histories. For comparison, the unscaled Kobe ground motion were also considered as input.

JAEA Reports

Journal Articles

R&D-RC structure using electrical insulated reinforcing bar, Part 9; $$gamma$$-radiation damage of electrical insulated reinforcing bar

Akutsu, Yoichi; Okawa, Yoshinao; Suzuki, Hideyuki; *; *; *

Nihon Kenchiku Gakkai Taikai Gakujutsu Koen Kogaishu; Hokuriku, p.1043 - 1044, 1992/08

no abstracts in English

JAEA Reports

None

; ; ; ;

PNC-TN8410 92-074, 133 Pages, 1992/04

PNC-TN8410-92-074.pdf:3.8MB

None

Journal Articles

Application of epoxy-coated rebars to large electric structure for electrical insulation

Akutsu, Yoichi; Okawa, Yoshinao; ; *

Konkurito Kogaku Rombunshu, 3(1), p.65 - 76, 1992/01

no abstracts in English

Journal Articles

Application of epoxy-coated reinforcing bars to large electric structure for electric insulation

Akutsu, Yoichi; Okawa, Yoshinao; *; *

Transactions of the Japan Concrete Institute,Vol. 14, p.217 - 230, 1992/00

no abstracts in English

Journal Articles

An experimental research on shear resistance of reinforced concrete slabs

; *

Nihon Kenchiku Gakkai Rombun Hokokushu, (70), p.32 - 37, 1962/02

no abstracts in English

Oral presentation

Neutron engineering approach for structural engineering research of reinforced concrete

Suzuki, Hiroshi; Kusunoki, Koichi*; Kanematsu, Manabu*; Harjo, S.

no journal, , 

Neutron diffraction, which is a nondestructive and noncontact method for strain measurement, was applied to the strain measurement of rebar in the reinforced concrete. The three-dimensional deformation behavior of the embedded rebar including the axial and transverse strains was accurately measured under pullout loading using time-of-flight neutron diffraction. Furthermore, bond deterioration around the cracks in concrete and that around corroded rebar were successfully observed by measuring the strain distributions along rebar by neutron diffraction. The neutron diffraction technique is expected to be a novel strain measurement method for the rebar embedded in concrete for understanding actual phenomena on reinforced concrete structures.

Oral presentation

Study on corrosion inspection of steel bar embedded in concrete using laser excited ultrasonic

Furusawa, Akinori; Nishimura, Akihiko; Takenaka, Yusuke*

no journal, , 

The purpose of this work is to develop ultrasonic methodology of detecting corrosion of the steel bar embedded in concrete. Irradiating pulse-laser beam at the bottom of the corroded steel bar embedded in concrete generates ultrasonic propagating the bar to be measured at another bottom. The corroded steel bar embedded in concrete is made by electrical corrosion method. Comparing waveforms of the corroded steel bar and of the sound one, issues concerning with the different waveforms are reported.

Oral presentation

Bending bond stress evaluation of RC member using TOF neutron diffraction

Satake, Kosuke*; Kusunoki, Koichi*; Mukai, Tomohisa*; Kanematsu, Manabu*; Koyama, Taku*; Suzuki, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

Proposal of in-service monitoring using a deformed steel combined with heat resistant FBG sensors

Nishio, Yuhei*; Nishimura, Akihiko; Takenaka, Yusuke*; Suzuki, Hiroshi; Kanematsu, Manabu*

no journal, , 

no abstracts in English

Oral presentation

Evaluation of deformation behavior of reinforced concrete using neutron beam techniques

Ueno, Kazuki*; Suzuki, Hiroshi; Koyama, Taku*; Sekine, Mariko*; Nishio, Yuhei*; Kanematsu, Manabu*

no journal, , 

no abstracts in English

Oral presentation

Experimental study for flexural bonding on reinforced concrete structure using neutron diffraction, 1; Application of neutron stress measurement

Suzuki, Hiroshi; Satake, Kosuke*; Kusunoki, Koichi*; Kanematsu, Manabu*; Mukai, Tomohisa*

no journal, , 

no abstracts in English

22 (Records 1-20 displayed on this page)