Large-span bridge elastic-plastic damping system

A technology of shock absorption system and bridge bomb, applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problem of inability to ensure plastic behavior, and achieve the effect of high utilization rate of material strength, light weight and low durability

Active Publication Date: 2017-01-04
CHINA ROAD & BRIDGE +1
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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

Method used

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  • Large-span bridge elastic-plastic damping system

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Embodiment Construction

[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Such as figure 1 and figure 2 As shown, the cable anchorage of the elastic-plastic damping cable of the present invention adopts a redundant design, and a redundant wire reinforcement section 2 is added between the anchorage area 1 and the effective cable section 3 . The number of wires in the anchorage area and the reinforcement section is greater than the number of effective wires, and the redundant wire 4 is cut off in the effective wire section, forming a tensile capacity difference between the anchorage area and the reinforcement section 2 and the effective wire section 3, In order to avoid potential weak and damaged links from occurring in the anchorage area or the reinforcement section. The redundant cable 4 and the effective cable 5 control the pressure distribution in the pressure ring 6 in the pressure ring 6 to realize t...

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Abstract

The invention relates to a large-span bridge elastic-plastic damping system. The large-span bridge elastic-plastic damping system comprises damping cable pairs composed of elastic-plastic damping cables and a transverse viscous damper. The two damping cable pairs are arranged, one ends of the damping cable pairs are anchored on anchoring blocks integrally cast with a main beam of a bridge, the other ends of the damping cable pairs are anchored on main tower columns on the other sides, and the two damping cable pairs are symmetrically arranged. One end of the viscous damper is anchored on the bottom of the main beam, and the other end of the viscous damper is anchored on a main tower cross beam of the bridge. The damping system can provide enough restraint rigidity and bearing force under the normal use condition, has enough deformation capacity and energy consumption under the strong earthquake condition, and can remarkably improve the anti-seismic performance of the large-span bridge in a highly seismic region.

Description

technical field [0001] The invention belongs to the technical field of shock absorption of bridge engineering structures, and relates to an elastic-plastic shock absorption system of a long-span bridge. Background technique [0002] Long-span bridges are major transportation infrastructure projects. In order to reduce secondary disasters after earthquakes and ensure the safety of traffic lifelines, their 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 long-span bridges in high-intensity earthquake areas and active fault areas has become an inevitable and realistic demand. A lot of practice has proved that adopting proper seismic reduction and isolation design is an effective method to improve the seismic performance of long-span bridges. , can significantly reduce the inertial force transmitted to the substructure, and realize the mutual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00
CPCE01D19/00
Inventor 郭河李连友管仲国周马生
Owner CHINA ROAD & BRIDGE
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