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Proceedings Papers

Experiment of Floating Seismic Isolation System

Takashi Mori, Takahiro Shimada, Satoru Kai, Akihito Otani, Tomohiko Yamamoto, Xing L. Yan
Proc. ASME. PVP2023, Volume 7: Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division, V007T08A021, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-102224
https://doi.org/10.1115/PVP2023-102224
View Paper titled, Experiment of Floating Seismic Isolation System
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Topics: Cavities, Damping, Design, Excitation, Floating structures, Ocean engineering, Orifices, Physics, Seismic waves, Small modular reactors
Proceedings Papers

Uncertain Factors in Elastic-Plastic Finite Element Analysis for Elbows and Tees

Kisaburo Azuma, Keita Fujiwara, Satoru Kai, Akihito Otani, Osamu Furuya
Proc. ASME. PVP2023, Volume 7: Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division, V007T08A012, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-106166
https://doi.org/10.1115/PVP2023-106166
View Paper titled, Uncertain Factors in Elastic-Plastic Finite Element Analysis for Elbows and Tees
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Topics: Finite element analysis, Low cycle fatigue
Proceedings Papers

On Multiaxial Strain Characteristics of Piping Systems Subjected to Earthquake Loads

Masaki Morishita, Akihito Otani
Proc. ASME. ICONE29, Volume 6: Nuclear Codes, Standards, Licensing, and Regulatory Issues, V006T06A002, August 8–12, 2022
Publisher: American Society of Mechanical Engineers
Paper No: ICONE29-90172
https://doi.org/10.1115/ICONE29-90172
View Paper titled, On Multiaxial Strain Characteristics of Piping Systems Subjected to Earthquake Loads
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Topics: Cycles, Earthquake resistant design, Earthquakes, Fatigue, Pipes, Piping systems, Stress, Excitation, ASME Boiler and Pressure Vessel Code, Deformation
Proceedings Papers

Research and Examination of Seismic Safety Evaluation and Function Maintenance for Important Equipment in Nuclear Facilities

Osamu Furuya, Satoshi Fujita, Hitoshi Muta, Yasuki Ohtori, Tatsuya Itoi, Shigeki Okamura, Keisuke Minagawa, Izumi Nakamura, Shigeru Fujimoto, Akihito Otani, Akemi Nishida, Tomoyoshi Watakabe
Proc. ASME. PVP2021, Volume 5: Operations, Applications, and Components; Seismic Engineering; Non-Destructive Examination, V005T08A022, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-61781
https://doi.org/10.1115/PVP2021-61781
View Paper titled, Research and Examination of Seismic Safety Evaluation and Function Maintenance for Important Equipment in Nuclear Facilities
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Topics: Maintenance, Nuclear power stations, Safety
Journal Articles

A JSME Code Case on Piping Seismic Design Based on Inelastic Response Analysis and Strain-Based Fatigue Criteria

Masaki Morishita, Akihito Otani, Izumi Nakamura, Tomoyoshi Watakabe, Tadahiro Shibutani, Masaki Shiratori
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. April 2020, 142(2): 021203.
Paper No: PVT-19-1160
https://doi.org/10.1115/1.4045674
Published Online: February 24, 2020
View Article titled, A JSME Code Case on Piping Seismic Design Based on Inelastic Response Analysis and Strain-Based Fatigue Criteria
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Topics: Fatigue, Pipes, Earthquake resistant design, Design, Cycles, Stress, Damping
Journal Articles

Benchmark Analyses on the Elastic–Plastic Behavior of Carbon Steel Pipes Under Seismic Load

Izumi Nakamura, Tomoyoshi Watakabe, Akihito Otani, Tadahiro Shibutani, Masaki Morishita, Masaki Shiratori
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. April 2020, 142(2): 021901.
Paper No: PVT-19-1085
https://doi.org/10.1115/1.4045606
Published Online: February 24, 2020
View Article titled, Benchmark Analyses on the Elastic–Plastic Behavior of Carbon Steel Pipes Under Seismic Load
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Topics: Pipes, Piping systems, Yield stress, Stress, Carbon steel, Work hardening, Approximation
Proceedings Papers

Applicability of Seismic Fatigue Evaluation by JSME Code Case, NC-CC-008

Akihito Otani, Izumi Nakamura, Tomoyoshi Watakabe, Masaki Morishita, Tadahiro Shibutani, Masaki Shiratori
Proc. ASME. PVP2019, Volume 8: Seismic Engineering, V008T08A001, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93123
https://doi.org/10.1115/PVP2019-93123
View Paper titled, Applicability of Seismic Fatigue Evaluation by JSME Code Case, NC-CC-008
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Topics: Cycles, Earthquake resistant design, Fatigue, JSME Standards, Pipes
Proceedings Papers

Failure Modes of Piping Systems Under Seismic Loading and Evaluation

Satoru Kai, Akihito Otani
Proc. ASME. PVP2019, Volume 8: Seismic Engineering, V008T08A026, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93438
https://doi.org/10.1115/PVP2019-93438
View Paper titled, Failure Modes of Piping Systems Under Seismic Loading and Evaluation
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Topics: Collapse, Failure mechanisms, Pipes, Piping systems, Stress, Deformation, Failure, Buckling, Cantilevers, Cycles
Proceedings Papers

Effect of Static Load Components in Seismic Loading on Gross Plastic Deformation on Structure

Satoru Kai, Akihito Otani
Proc. ASME. PVP2018, Volume 8: Seismic Engineering, V008T08A021, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84415
https://doi.org/10.1115/PVP2018-84415
View Paper titled, Effect of Static Load Components in Seismic Loading on Gross Plastic Deformation on Structure
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Topics: Deformation, Stress, Collapse, Failure mechanisms, Inertia (Mechanics), Materials properties, Weight (Mass)
Proceedings Papers

Application of JSME Seismic Code Case by Elastic-Plastic Response Analysis to Practical Piping System

Akihito Otani, Satoru Kai, Naoaki Kaneko, Tomoyoshi Watakabe, Masanori Ando, Kazuyuki Tsukimori
Proc. ASME. PVP2018, Volume 8: Seismic Engineering, V008T08A001, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84079
https://doi.org/10.1115/PVP2018-84079
View Paper titled, Application of JSME Seismic Code Case by Elastic-Plastic Response Analysis to Practical Piping System
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Topics: Japan Society of Mechanical Engineers, Piping systems, Earthquake resistant design, Fatigue, Pipes, Breeder reactors, Coolants, Engineering standards, Piping design, Stiffness
Proceedings Papers

A Concept of Intermediate Heat Exchanger for High-Temperature Gas Reactor Hydrogen and Power Cogeneration System

Noriaki Hirota, Atsuhiko Terada, Xing L. Yan, Kohei Tanaka, Akihito Otani
Proc. ASME. ICONE26, Volume 1: Operations and Maintenance, Engineering, Modifications, Life Extension, Life Cycle, and Balance of Plant; Instrumentation and Control (I&C) and Influence of Human Factors; Innovative Nuclear Power Plant Design and SMRs, V001T13A015, July 22–26, 2018
Publisher: American Society of Mechanical Engineers
Paper No: ICONE26-81718
https://doi.org/10.1115/ICONE26-81718
View Paper titled, A Concept of Intermediate Heat Exchanger for High-Temperature Gas Reactor Hydrogen and Power Cogeneration System
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Topics: Combined heat and power, Heat exchangers, High temperature, Hydrogen, Nuclear reactors, Conceptual design, Design, Gas turbines, Construction, Creep
Journal Articles

Study on Piping Seismic Response Under Multiple Excitation

Satoru Kai, Tomoyoshi Watakabe, Naoaki Kaneko, Kunihiro Tochiki, Kazuyuki Tsukimori, Akihito Otani
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. June 2018, 140(3): 031801.
Paper No: PVT-17-1118
https://doi.org/10.1115/1.4039453
Published Online: April 10, 2018
View Article titled, Study on Piping Seismic Response Under Multiple Excitation
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Topics: Excitation, Pipes, Piping systems, Stress
Proceedings Papers

Load Classification for Dynamic Responses on Single Mass Cantilever Structure With Bi-Linear Material Property

Satoru Kai, Akihito Otani
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A026, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65099
https://doi.org/10.1115/PVP2017-65099
View Paper titled, Load Classification for Dynamic Responses on Single Mass Cantilever Structure With Bi-Linear Material Property
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Topics: Cantilevers, Dynamic response, Materials properties, Stress, Inertia (Mechanics), Deformation, Pipes, Design, Excitation, Nuclear power stations
Proceedings Papers

Seismic Qualification of Piping Systems by Detailed Inelastic Response Analysis: Part 1 — A Code Case for Piping Seismic Evaluation Based on Detailed Inelastic Response Analysis

Masaki Morishita, Akihito Otani, Tomoyoshi Watakabe, Izumi Nakamura, Tadahiro Shibutani, Masaki Shiratori
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A001, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65166
https://doi.org/10.1115/PVP2017-65166
View Paper titled, Seismic Qualification of Piping Systems by Detailed Inelastic Response Analysis: Part 1 — A Code Case for Piping Seismic Evaluation Based on Detailed Inelastic Response Analysis
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Topics: Pipes, Piping systems, Fatigue, Damping, Earthquake resistant design, Inelastic analysis, Japan Society of Mechanical Engineers, Plasticity, Absorption, Design
Proceedings Papers

Seismic Qualification of Piping System by Detailed Inelastic Response Analysis: Part 2 — A Guideline for Piping Seismic Inelastic Response Analysis

Akihito Otani, Tadahiro Shibutani, Masaki Morishita, Izumi Nakamura, Tomoyoshi Watakabe, Masaki Shiratori
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A002, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65190
https://doi.org/10.1115/PVP2017-65190
View Paper titled, Seismic Qualification of Piping System by Detailed Inelastic Response Analysis: Part 2 — A Guideline for Piping Seismic Inelastic Response Analysis
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Topics: Pipes, Piping systems, Earthquake resistant design, Fatigue, Damping, Design, Engineering standards, Japan Society of Mechanical Engineers, Materials properties, Modeling
Proceedings Papers

Seismic Qualification of Piping Systems by Detailed Inelastic Response Analysis: Part 3 — Variation in Elastic-Plastic Analysis Results on Carbon Steel Pipes From the Benchmark Analyses and the Parametric Analysis

Izumi Nakamura, Akihito Otani, Masaki Morishita, Masaki Shiratori, Tomoyoshi Watakabe, Tadahiro Shibutani
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A003, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65316
https://doi.org/10.1115/PVP2017-65316
View Paper titled, Seismic Qualification of Piping Systems by Detailed Inelastic Response Analysis: Part 3 — Variation in Elastic-Plastic Analysis Results on Carbon Steel Pipes From the Benchmark Analyses and the Parametric Analysis
Open the PDF for Seismic Qualification of Piping Systems by Detailed Inelastic Response Analysis: Part 3 — Variation in Elastic-Plastic Analysis Results on Carbon Steel Pipes From the Benchmark Analyses and the Parametric Analysis in another window
Topics: Carbon steel, Pipes, Piping systems, Japan Society of Mechanical Engineers, Approximation, Design, Engineering standards, Failure, Finite element model, Inelastic analysis
Proceedings Papers

Seismic Qualification of Piping Systems by Detailed Inelastic Response Analysis: Part 4 — Second Round Benchmark Analyses With Stainless Steel Piping Component Test

Tomoyoshi Watakabe, Izumi Nakamura, Akihito Otani, Masaki Morishita, Tadahiro Shibutani, Masaki Shiratori
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A004, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65324
https://doi.org/10.1115/PVP2017-65324
View Paper titled, Seismic Qualification of Piping Systems by Detailed Inelastic Response Analysis: Part 4 — Second Round Benchmark Analyses With Stainless Steel Piping Component Test
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Topics: Pipes, Piping systems, Stainless steel, Design, Carbon steel, Earthquake resistant design, Stress, Design methodology, Engineering standards, Failure
Proceedings Papers

Study on Dynamic Response by Alternating and Static Load

Akihito Otani, Satoru Kai
Proc. ASME. PVP2016, Volume 8: Seismic Engineering, V008T08A018, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63363
https://doi.org/10.1115/PVP2016-63363
View Paper titled, Study on Dynamic Response by Alternating and Static Load
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Topics: Dynamic response, Stress, Collapse, Deformation, Displacement, Inertia (Mechanics), Earthquakes, Pipes, Earthquake resistant design, Nuclear power stations
Proceedings Papers

Findings From the Benchmark Analyses on an Elbow In-Plane Bending Test and a Piping System Test

Izumi Nakamura, Akihito Otani, Tadahiro Shibutani, Masaki Morishita, Masaki Shiratori
Proc. ASME. PVP2016, Volume 8: Seismic Engineering, V008T08A007, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63419
https://doi.org/10.1115/PVP2016-63419
View Paper titled, Findings From the Benchmark Analyses on an Elbow In-Plane Bending Test and a Piping System Test
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Topics: Piping systems, Pipes, Safety, Approximation, Deflection, Design, Dynamic response, Eigenvalues, Electromagnetic scattering, Excitation
Proceedings Papers

Study on Dynamic Alternating Load on Piping Seismic Response

Satoru Kai, Akihito Otani
Proc. ASME. PVP2015, Volume 8: Seismic Engineering, V008T08A015, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45287
https://doi.org/10.1115/PVP2015-45287
View Paper titled, Study on Dynamic Alternating Load on Piping Seismic Response
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Topics: Pipes, Stress, Inertia (Mechanics), Displacement, Collapse, Deformation, Earthquake resistant design, Earthquakes, Vibration, Damping