Elastic-plastic damping cable for transverse damping of large-span bridge

Abstract

The invention relates to an elastic-plastic damping cable for transverse damping of a large-span bridge. Redundant design is adopted for inhaul cable anchoring, and a redundant cable wire reinforcing segment is additionally arranged between an anchoring zone and an effective cable segment. The number of cable wires in the anchoring zone and the reinforcing segment is larger than that of effective cable wires, redundant cable wires are cut off in the effective cable segment, a tension resisting capacity level difference between the anchoring zone and the reinforcing segment, and the effective cable segment is formed, and thus it is avoided that potential weak and destructive links occur in the anchoring zone or the reinforcing segment. Damping cables can provide sufficient restraint rigidity and bearing capacity under the normal use condition and have sufficient deformability and energy dissipation capacity under the strong earthquake condition, and therefore the seismic performance of the large-span bridge in a strong earthquake area can be significantly improved.

Description

Technical field [0001] The invention belongs to the technical field of damping of bridge engineering structures, and relates to an elastic-plastic damping cable used for lateral damping of large-span bridges. Background technique [0002] The long-span bridge is a major transportation infrastructure project. In order to reduce the secondary disasters after the earthquake and ensure the safety of the traffic lifeline, its seismic safety cannot be underestimated. With the implementation of my country's western resource development strategy and the "One Belt, One Road" national strategy, the construction of large-span bridges in areas with high seismic intensity and active faults has become an inevitable reality. A lot of practice has proved that the use of appropriate seismic reduction and isolation design is an effective method to improve the seismic performance of long-span bridges. Appropriate seismic reduction and isolation measures are set at the pier-beam, tower-beam and othe...

AI Technical Summary

Problems solved by technology

However, the anchor head is the potential weak link of the current elastic cables and finished cable-stayed cables, which cannot ensure their stable plastic behavior; secondly, the cable-stayed cables used for bridge lateral There are great differences in the stress state of the cables, which have higher requirements on the connection structure such as rotation, etc. Objectively, it is necessary to develop new products according to the design purpose and use requirements of the shock-absorbing cables

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