Anchorage structure for steel column of prefabricated viaduct

Abstract

The invention discloses an anchorage structure for a steel column of a prefabricated viaduct. The anchorage structure is characterized in that a column base flange is welded and arranged on the bottom of the steel column and at least two layers of flanges which are arranged vertically are embedded in a concrete pile cap. The at least two layers of flanges are in bolted connection with each other by anchor bolts, and the upper ends of the anchor bolts protrude from the concrete pile cap. The column base flange is bolted with the anchor bolts. The anchorage structure formed by flanges and anchor bolts spreads the large and complex forces acting on the steel column separately from three faces in contact with concrete of the column base flange, the upper flange and the lower flange to the concrete pile cap. The anchorage structure can more efficiently anchor the steel column of the viaduct on the concrete pile cap while realizing the prefabricated function; and the concrete pile cap is not liable to be damaged under eccentric shaft pressure and when the bending moment is large.

Description

technical field [0001] The invention relates to the technical field of anchorage between viaduct steel columns and concrete caps, in particular to an anchoring structure for prefabricated viaduct steel columns, which can more effectively anchor viaduct steel columns to concrete caps and realize prefabricated assembly Function. Background technique [0002] In the past, the viaduct columns were basically made of concrete. With the improvement of the economic level and technical level, and the country's vigorous promotion of prefabricated buildings, the use of steel columns is also increasing, and the anchorage structure of steel columns is also becoming more and more Attention has been paid to it, and the existing anchoring structures generally have the following two forms: (1) direct insertion type, (2) pre-embedded steel bar or prestressed cable anchorage. [0003] These two types of anchoring structures can be barely used when the force on the steel column is not too larg...

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Problems solved by technology

[0003] These two types of anchoring structures can be barely used when the force on the steel column is not too large. When some important structures such as viaduct columns have large and complex forces at the base of the column, these two types of anchoring structures cannot be used very well. For example, when the column base is subject to a large bending moment, one side of the direct insertion type is prone to cracking at the joint with the concrete, and the pre-embedded steel bar or prestressed cable anchoring type is subject to a large axial force and a large bending moment at the column base. The bearing area of ​​the concrete contact surface of the platform cap is small, which may easily lead to the yielding of the platform concrete

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