After careful consideration by juries, Grand Prix, Prize, and 3 Honorable Judge Award have been selected. On November 15th 2024, the Awards Ceremony was held at Shinagawa Intercity Hall.
▲Awards Ceremony(November 15th 2024, at Shinagawa Intercity Hall)
Aratani Civil Engineering Consultants CO.,LTD.
Program Used:Engineer's Studio®
The target structure consists of three simple steel (iron) rivet truss bridge spans with a 45° skew angle, classified as a complex bridge in terms of seismic behavior. Given the need for rapid post-earthquake recovery following a Level 2 earthquake, it was essential to keep the bridge components within the elastic range. Therefore, a seismic response analysis was conducted to assess the existing seismic performance and establish necessary seismic measures.Since this bridge is classified as a special type of bridge with few seismic retrofitting examples, consultations were held with experts in steel bridge design and structural analysis to verify the analysis methods, condition settings, and validity of the results. This ensured a comprehensive approach to setting appropriate seismic countermeasures.
NiX JAPAN Co., Ltd.
"This bridge has an 85-meter span with an upward lane constructed with a single steel arch girder and a downward lane constructed with a two-span continuous pre-tensioned I-girder plus a single steel arch girder. The single steel arch girder section is an integrated structure for both lanes, while the PC girder section has a separated structure for each lane.To properly assess the seismic performance of the existing bridge and understand the scope of reinforcement required, dynamic analysis was conducted. This involved creating a fiber model to consider the effects of axial force variations on steel members, and developing a nonlinear model for piers connected to the abutment and beams as framed piers. Additionally, the modeling took into account the resistance of the soil behind the abutments, focusing on the surrounding characteristics. As a result, it was found that the shear capacity of the beam members was insufficient, providing fundamental data for the detailed design of future reinforcements.
TABUCHI ARCHITECT & ASSOCIATES Co,Ltd.
Experimental results have shown that the failure modes of hollow RC pier sections in existing structures differ from those of solid sections, leading to the limitation of M-φ properties application to "solid sections" as of the H24 specifications. Consequently, there is currently no established verification method to replace M-φ properties for hollow sections. Some commissioning agencies assume that the plane retention assumption is valid by filling hollow sections with air mortar, thus applying M-φ properties even in the plastic region. However, as air mortar cannot be applied to the upper ends of the columns, there is inconsistency in handling the rigidity characteristics of the plasticized upper ends (hollow areas) in in-plane analyses. While 3D FEM analyses are sometimes used, they present issues with increased time and cost.Therefore, this report proposes challenges and solutions for utilizing Engineer's Studio® fiber models as a more simplified verification method.
Knowledge Fusion Co.,Ltd.
The M7.6 Noto Peninsula Earthquake of January 1 this year caused extensive damage to various structures. This earthquake marked the first time in Japan that a building collapsed due to pile damage. The cause is believed to be the amplification of building vibrations on soft ground. Many bridges in the affected area are also supported by piles on weak ground. Furthermore, approximately eight months after this earthquake, the Noto Peninsula experienced a compound disaster, with record rainfall leading to flooding, landslides, and extensive road damage.
Toyo Engineering Corporation
In constructing a new bridge abutment adjacent to a railway track, excavation was carried out for the pile foundation of the A1 abutment. Steel sheet pile earth-retaining walls were installed, and a multi-stage excavation was conducted with struts. The ground composition includes a 7-meter thick embankment layer at the surface, followed by a 15-meter thick alluvial layer consisting of alternating layers of clayey, sandy, and gravelly soils, and then a diluvial layer. The excavation depth reaches the base of the embankment layer at 7 meters, with two levels of struts. As the railway track center is located just 6 meters from the excavation face, ground deformation due to excavation was a concern. A linear elastic FEM analysis was conducted, with a multi-stage approach to simulate the excavation process. This report summarizes the results of the ground deformation analysis.
Oriental Shiraishi Corporation
Construction Engineering Consultants
Doboku Giken
Chiyoda Engineering Consultants Co., Ltd.
F-TECH INC.
With the growing desire for society to build lasting structures that can withstand the tests of disasters, NaRDA was established in 2014 to recognize those who are taking action. Focusing on many different disciplines from civil engineering, to hydroengineering, and disaster prevention. These contributions will be awarded and will become a key source of information and technical study for the future.
Content that directly or indirectly contributes to the overall improvement to national resilience, similar but not limited to disaster prevention and mitigation, rational design methods, BCP, and risk management.
Mandatory Requirements
1.Title and subtitle of work: 20-40 characters
2.Outline of work: 150-200 characters
3.Poster:A1A1 landscape (Purpose/contents are simply described)
>>Poster Template(Word、111KB)
4.eport (Purpose, methods, results, limitations, etc.): 2-10 pages
>>Report Template(Word、58KB)
5.Input Data (Result File)
6.List of Products Used
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1.Animation, Videos
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Tue. Nov. 12th, 2024
Fri. Nov. 15th, 2024
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Grand Prix
High-performance laptop (raytrek R5-RL5), Book gift cards (JPY50,000), Trophy, Certificate
2nd Prize
Gaming laptop (GALLERIA RL5C-R35), Book gift cards (JPY20,000), Certificate
Honorable Judge Award
Shade3D Game Programming PC, Book gift cards (JPY10,000), Certificate
Nomination Award
Book gift cards (JPY5,000), Plaque
PC special sponsor Third Wave Co., Ltd.
Chair
Honorary Prof., Tokyo City University
Waseda University's Faculty of Science and Engineering Graduate with a specialization in Construction. Doctorate of construction engineering. Specializes in seismic design, earthquake risk, and reinforced concrete. Recipient of JSCE awards, Yoshida Award, etc., and the author of many books.
Honorary Prof., Shibaura Institute of Tech.
Specializes in urban hydrology, groundwater hydrology, and flood risk management. Author of "Groundwater Talks - The Crisis of Invisible Resources" (Iwanami Shinsho).
Professor, Gunma Univ.Graduate School of Science and Eng.
Specializes in disaster prevention, earth and foundationional disasters, etc. Research on computer-based phenomenon prediction, mechanisms for extreme weather/major earthquakes, and disaster mitigation measures.
Tamana City, Kumamoto Prefecture
Chiyoda Engineering Consultants Co., Ltd.
Nihon Suiko Consultant Co.,Ltd.
PENTA-OCEAN CONSTRUCTION CO., LTD.
Nippon Concrete Industries Co., Ltd.
Tonichi Design Consultant Co., Ltd.
10th NaRDA (2023)
Tamana City, Kumamoto Prefecture
KAJIMA CORPORATION
Chiyoda Engineering Consultants Co., Ltd.
Mizota Design Office
TAKENAKA CORPORATION
KATAHIRA & ENGINEERS INC.
NTC Consultants Inc.
Nissin Tech
Knowledge Fusion Co., Ltd.
Doboku Giken
9th NaRDA (2022)
KRAY Inc.
Hagihara Giken Co., Ltd.
Chikyu Giken Consultant
Wakasuzu Consultants Co., Ltd.
SK Engineering
Knowledge Fusion Co., Ltd.
Yabu Doken Co., Ltd.
Ube Industries Consultant Co.,Ltd.
FUJI Consultants Co.,Ltd.
Kitacon Corporation
Sanei Sekkei
8th NaRDA (2021)
NiX Co., Ltd.
F-tech Inc.
Knowledge Fusion Co., Ltd.
SANKYO ENGINEERING Co., Ltd.
SEED CONSULTANT,INC.
ORBIT Co.,LTD.
FUJI Consultants Co.,Ltd.
Kyushu Electric Power Company, Incorporated
7th NaRDA (2020)
Nihon Suiko Consultant Co.,Ltd
Naigai Engineering Co., Ltd.
Sanpoh Co.,LTD
Civil Engineering and Information Technology Consultants Inc.
Geo Formation
Sanei Sekkei
Aratani Civil Engineering Consultants CO.,LTD.
Epoch Design
6th NaRDA (2019)
Akita Prefectural University Faculty of Systems Science and Technology
F-tech Inc.
SHO-BOND CORPORATION Nagoya Branch
Knowledge Fusion Co., Ltd.
Kyushu Civil Engineering
JR Kyushu Consultants Company
Namura Shipbuilding Co., Ltd.
Morimatsu Industry Co., Ltd.
5th NaRDA (2018)
Institute of Technology, PENTA-OCEAN CONSTRUCTION CO., LTD.
Knowledge Fusion Co.,Ltd.
KATAHIRA & ENGINEERS INC.
Kagoshima University
NIHON SAMICON CO., LTD.
Cosmo Consultants Co., Ltd
Marine Support Engineering
APPLIED TECHNOLOGY CO., LTD.
Wakasuzu Co., Ltd.
4th NaRDA (2017)
Next Energy & Resources Co., Ltd.
Nippon Concrete Industries Co., Ltd.
CIVIC ARTS Consulting Inc.
APPLIED TECHNOLOGY CO., LTD.
Japan Association of Diaphragm Wall
Takenaka Corporation
Ahbo, Inc.
Wakasuzu Consultants Co., Ltd. Oita office
3rd NaRDA (2016)
Nippon Concrete Industries Co., Ltd.
Association of road and bridge structure, Ministry of Land, Infrastructure, Transport and Tourism. Central Regional Development Bureau
A x C
Oita National College of Technology
APPLIED TECHNOLOGY CO.,LTD.
Totetsu Mfg. Co.,Ltd.
Sankyo Technology Co., Ltd.
JAPAN-CHINA CONSULTANT Co., LTD Nagoya Office
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