Title: Key Techniques for Design of Edong Changjiang River Highway Bridge
Abstract: The main bridge of Edong Changjiang River Highway Bridge is a semi-floating system hybrid girder cable-stayed bridge with double pylons,double cable planes and with a main span 926 m.The main girder of the bridge was designed as the PK(Pasco-Kennewick Bridge) cross section of separated twin boxes,of which the part of the girder for the central span is of the steel box girder,the parts of the girder for the side spans are of the prestressed concrete(PC) box girders and a steel and concrete joint section was set on each side of the central span at a distance of 12.5 m to the center of a pylon.To ensure a smooth transition between the steel and concrete structure,the multi-cell force transmission structure with PBL shear connectors was used for the joint section.The cable-to-pylon anchorage is the steel anchor box structure built in the column of a pylon.To control the development of concrete cracks in the anchorage zone in the pylon,the prestressing strands of 12фs15.24 were set in the concrete pylon wall on the side of the anchorage.To enhance the structural durability and service life,the durability of reinforced concrete and corrosion protection of steel structure were designed and the life cycle cost concept was applide to the design.The inspection and maintenance accesses for all principal components of the bridge were provided and the inspection and maintenance cycles,replacement criteria,workmanship and technical requirements were formulated as well.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Cited By Count: 2
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