Istanbul Bridge Conference, 11-13 August 2014, Hilton Istanbul Hotel

Chodai Corporation

In 1968, "Long Span Bridge Design Center", the predecessor of CHODAI Co., Ltd., was established by 13 engineers, aiming to be one of the top consulting firms in bridge engineering, giving its first priority to technological capability. In 1970, CHODAI was awarded its first big project, Great Seto Bridge. Since that project, CHODAI has been participating in lots of long span bridge projects (in planning, design, construction supervision, construction management, rehabilitation and maintenance) with the latest technologies, and pioneering new fields such as BMS (Bridge Management System) etc. CHODAI remains as one of premier bridge engineering firms, with remarkable records of long span bridges worldwide.

While diversifying its activities, CHODAI has expanded its field of services out of structural engineering to urban planning, transportation planning, environmental / social consideration, water supply & sewage, ITS and computer systems.

Invited Speaker

State-of-the-Art of New Materials and Future Perspectives on Super Long Span Bridges

Yusuf Zahit Gündogdu, M.S.SE
Chodai Turkey Representative

STATE-OF-THE-ART OF NEW MATERIALS AND FUTURE PERSPECTIVES ON SUPER LONG SPAN BRIDGES

Tetsuo Yamane, Chodai, Japan
Akira Takaue, Chodai, Japan
Torahiko Ikeda, Chodai, Japan
Yusuf Zahit Gündoğdu, Chodai, Turkey

In this study, feasibility of using new materials for super long bridges to extend the length of center span will be discussed. First, Carbon-Fiber Reinforced Plastic (CFRP) material will be introduced. When examined in contrast, superiority of CFRP material’s structural properties, such as unit weight, tensile strength etc., over conventional steel wire will be emphasized. Then a trial concept design, 5,000m center span length, will be exhibited, followed by addressing the technical issues of CFRP material to be solved. Furthermore, practical state-of-the-art and recent advances in high-strength steel wire will be presented. Thermo-Mechanical Controlled Process (TMCP) and conventional steel wire production technologies will be compared. Two types of high performance steel produced by using TMCP which show improved yield strength, welding workability, formability and fatigue life when compared to conventional steel will be investigated. Finally, future super long bridge project plans in Japan will be introduced.

Selected References

Location: Japan
Type: Pre-stressed Concrete Cable-Stayed Bridge
Contract Period: 2001-2004
Length: 517m
Main Span: 261m
Pylon Height: 65m
Deck Width: 20.5m
Design & Construction Stage: B/D, D/D

 

Detailed Information: Wikipedia

Location: Egypt
Type: Steel Box Girder Cable-Stayed Bridge
Contract Period: 1995-2001
Length: 730m
Main Span: 404m
Navigation Clearance: 155.5m
Deck Width: 19.8m
Design & Construction Stage: F/S, D/D, C/S

 

Detailed Information: Wikipedia

Location: Japan
Type: Single-Span Suspension Bridge
Contract Period: 2000-2005
Length: 903m
Main Span: 540m
Navigation Clearance: 50m
Deck Width: 16.0m
Design & Construction Stage: B/D, D/D

 

Detailed Information:Wikipedia

Location: Japan
Type: 3-Span Suspension Bridge
Contract Period: 1989-1999
Length: 3,910m
Main Span: 1,991m
Navigation Clearance: 65m
Deck Width: 35.0m
Design & Construction Stage: D/D, C/S

 

Detailed InformationWikipedia

Location: Republic of Korea
Type: 3-Span Suspension Bridge
Contract Period: 1995-2002
Length: 7,420m
Main Span: 500m
Navigation Clearance: 28m
Deck Width: 25.0m
Design & Construction Stage: B/D, C/S

 

Detailed Information: Wikipedia

Location: Republic of Korea
Type: Steel Box Girder Cable-Stayed Bridge
Contract Period: 2004-2008
Length: 1,480m (main bridge)
Main Span: 800m
Pylon Height: 238.5m
Navigation Clearance: 74.0m
Deck Width: 33.4m
Design & Construction Stage: B/D, D/D, C/S

 

Detailed InformationWikipedia

Location: Japan
Type: Steel Box Girder Cable-Stayed Bridge
Contract Period: 1980-1999
Length: 1,480m
Main Span: 890m
Pylon Height: 222.0m
Deck Width: 30.6m
Design & Construction Stage: B/D, D/D, C/S

 

Detailed InformationWikipedia

Location: Republic of Korea
Type: 3-Span Suspension Bridge
Contract Period: 1995-2002
Length: 7,420m
Main Span: 500m
Navigation Clearance: 28m
Deck Width: 25.0m
Design & Construction Stage: B/D, C/S

 

Detailed InformationWikipedia

Location: Japan
Type: 3-Span Suspension Bridge
Contract Period: 1978-1988
Length: 1,723m
Main Span: 1,100m
Deck Width: 30.0m
Design & Construction Stage: B/D, D/D, C/S

 

Detailed InformationWikipedia

Location: Turkey
Type: 3-Span Suspension Bridge
Contract Period: 2013-Present
Length: 2,907m
Main Span: 1,550m
Deck Width: 35.93m
Design & Construction Stage: C/S

 

Detailed InformationWikipedia

Location: Turkey
Type: 3-Span Suspension Bridge
Contract Period: 2013-Present
Length: 2,164m
Main Span: 1,408m
Navigation Clearance: 64.0m
Deck Width: 58.4m
Design & Construction Stage: C/S

 

Detailed Information: Wikipedia

Event Pictures