Products Description
When the atmospheric corrosion grade is C2 and C3 in the Marine atmospheric environment, weathering steel can be used naked; Under the action of load, the protective rust layer cracks and falls off. The cracking of the rust layer provides a channel for oxygen diffusion, weakens its protection ability to the matrix, and leads to further corrosion of the steel, and local corrosion is easy to occur. The factors affecting the uniformity of the anchor steel strand and the consequences of the uneven force on the steel strand in the cable are analyzed.
By introducing the working principle of the intelligent equivalent tension method, the construction technology of intelligent equivalent tension can control the force uniformity of each steel strand of the cable, and can meet the requirements of the design adjustment of the cable force well. It can provide reference for the design and construction of similar bridge cable-stayed system. The weathering resistant steel used in bare packaging will cause serious corrosion when used improperly, resulting in mechanical properties degradation, especially in the stress corrosion and corrosion fatigue state weathering resistant steel has attracted the attention and wide attention of bridge designers for its durability , and it has become an inevitable trend to expand the application of weathering resistant steel Bridges in China.
In view of the lack of theories and methods for the design of weathering steel Bridges in China, the application and research status of weathering steel as well as the design methods of weathering steel Bridges were reviewed through the investigation of foreign literatures on weathering steel and weathering steel Bridges, mainly referring to the construction experience of weathering steel Bridges in the United States, Japan and Europe. The corrosion mechanism of weathering steel under the coupling action of environment and load, the degradation of mechanical properties of weathering steel after corrosion, the design theory and detailed design method of weathering steel bridge are mainly discussed, and the achievements and existing problems are summarized and analyzed. The degradation of mechanical properties is more serious. The detailed design method of steel bridge is very important to ensure the corrosion resistance of weathering steel, and regular maintenance can extend the service life of the structure. The application of weathering steel can significantly reduce the life cycle cost of steel bridge.
The analysis results are intended to provide reference for the future research direction of corrosion resistance mechanism and mechanical properties of weathering steel in China, and for the design and construction of weathering steel Bridges.
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