Cable-stayed bridge inclined dragline and steel main bear armtie type anchoring structure

Abstract

The invention provides a stayed cable of a cable stayed bridge and a steel girder anchor plate type anchoring structure which relates to a stayed cable and steel girder anchoring connecting structure. Two sides of an anchor plate 1 welded on the top surface of the steel girder are provided with anchor plate stiffening ribs along the direction of the stayed cable. The bottom of the stiffening rib is welded with a head plate of the steel girder. A notch in the middle of the anchor plate is hung with the stayed cable; an anchor pipe which is made of a seamless pipe is embedded into a notch on the upper part of the anchor plate; an anchor backing plate is welded on the lower end of the anchor pipe. The anchor plate is connected with the lower end of an anchor tube. By adopting the invention, the anchor plate is directly welded to the top surface of the steel girder corresponding to a girder web plate to become a main stress unit in the 'anchor plate type' cable beam anchoring structure with great supporting force; the force of a bracing cable first passing through the anchor backing plate on the bottom of the anchor pipe is sent to the anchor pipe and then is sent to the anchor plate from the anchor pipe, the force is finally sent to the steel girder through a welding line, which can meet the requirement of a local stress at the position of an anchor point of the stayed cable; a stiffening rib plate is arranged in the direction of the cross-bridge, the stability is good; the invention has a novel structure, low cost, good economy and the strong spanning capacity of the bridge, thereby meeting the requirements of the bridge construction in China.

Description

technical field [0001] The invention relates to an anchored connection structure between a stay cable and a steel girder. Background technique [0002] With the rapid development of my country's social economy, personnel exchanges and material circulation are becoming more and more frequent, and infrastructure such as transportation is also developing rapidly. Various modern cable-stayed bridges that cross rivers, bays and other natural moats are emerging. Objectively, cable-stayed bridges are required Continuous innovation, development and promotion of design and construction technology. [0003] In the technical field of cable-stayed bridges, the anchorage connection of the cable-stayed cables on the steel girder has become a key technical issue in the design. Under the action of long-term huge loads, whether the mechanical performance of this part is reliable and whether the structure is easy to inspect and maintain is particularly important. It is related to the safety o...

AI Technical Summary

Problems solved by technology

[0006] (1) In terms of force, various types of force transmission methods are complex, and all types have stress concentration phenomena. In particular, some types of stress concentration phenomena are relatively serious, and special materials are required to meet the requirements.

[0007] (2) In terms of structure, various anchor structures are assembled and welded by steel plates and welded in the box or throughout the entire height of the main beam section. The plates are thick and there are many welds. The structure is relatively complicated and the construction is difficult.

Especially in the long-term operation stage, defects are not easy to find, and there are blind spots that cannot be maintained. Even if problems are found, it is not easy to repair, and the structural safety cannot be reliably guaranteed

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