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A platform for research: civil engineering, architecture and urbanism
Applied Technology of Stay Cable with Saddle System in Song Hieu Bridge
Cable stayed bridges are often chosen because of its long span and esthetics. However, this type of structure requires high level of corrosion protection of stay cable and components. Improved continuously since the mid-1970s, Freyssinet stay cable technology is the world reference in terms of fatigue resistance, protection against corrosion, ease of inspection and replaceability. High strength galvanized strand is selected to use along with active adjustable anchorage at girder level and saddle at tower to allow each strand goes through saddle and keep their protective HDPE sheath. Fatigue test of stay cable system is carried out as projects reference. Strand can resist 300 MPa stress amplitude at 45% of ultimate strength for 2 million cycles. Thank to high friction between strand and saddle that made by UHPC, unbalanced force between two sides of bridge will be assured not only during construction but also in service stage. This type of stay cable and friction saddle allow to minimize work of maintenance in time of service. The pylon is also more compact because of no space require for cable anchorage inside. Internal Hydraulic Dampers (IHD) is also used to limit vibration of stay cable due to traffic and wind and rain effect. To get accurate require tensile force in stay cable, iso-tension technology is used by special equipment. This is the first cable stayed bridge with friction saddle in Vietnam.
Applied Technology of Stay Cable with Saddle System in Song Hieu Bridge
Cable stayed bridges are often chosen because of its long span and esthetics. However, this type of structure requires high level of corrosion protection of stay cable and components. Improved continuously since the mid-1970s, Freyssinet stay cable technology is the world reference in terms of fatigue resistance, protection against corrosion, ease of inspection and replaceability. High strength galvanized strand is selected to use along with active adjustable anchorage at girder level and saddle at tower to allow each strand goes through saddle and keep their protective HDPE sheath. Fatigue test of stay cable system is carried out as projects reference. Strand can resist 300 MPa stress amplitude at 45% of ultimate strength for 2 million cycles. Thank to high friction between strand and saddle that made by UHPC, unbalanced force between two sides of bridge will be assured not only during construction but also in service stage. This type of stay cable and friction saddle allow to minimize work of maintenance in time of service. The pylon is also more compact because of no space require for cable anchorage inside. Internal Hydraulic Dampers (IHD) is also used to limit vibration of stay cable due to traffic and wind and rain effect. To get accurate require tensile force in stay cable, iso-tension technology is used by special equipment. This is the first cable stayed bridge with friction saddle in Vietnam.
Applied Technology of Stay Cable with Saddle System in Song Hieu Bridge
Lecture Notes in Civil Engineering
Nguyen-Xuan, Tung (editor) / Nguyen-Viet, Thanh (editor) / Bui-Tien, Thanh (editor) / Nguyen-Quang, Tuan (editor) / De Roeck, Guido (editor) / Duc, Nguyen Dac (author) / Ngoc, Nguyen Tuan (author)
International Conference on Sustainability in Civil Engineering ; 2022 ; Hanoi, Vietnam
Proceedings of the 4th International Conference on Sustainability in Civil Engineering ; Chapter: 17 ; 177-184
2023-08-13
8 pages
Article/Chapter (Book)
Electronic Resource
English
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