Bamboo-wood and steel composite box girder based on bolt connection

Abstract

The invention discloses a bamboo-wood and steel composite box girder based on bolt connection, which relates to the technical field of box girder. The invention comprises a top plate and a frame structure, the frame structure comprises a corrugated steel plate, twenty bamboo-wood bracing beams and shear-resistant steel sheets, a corrugated steel plate, twenty bamboo-wood bracing beams and shear-resistant steel sheets are fixedly connected with each other through sixty connecting assemblies, and the corrugated steel plate comprises a bending part and a horizontal part. Through the cooperation of the screw rod, a waist-shaped hole, a second through hole, a first through hole, a waist block, a cover plate, a pin column, the first positioning hole and the second positioning hole, the cover plate is fixed on one side of the bamboo-wood support beam, the corrugated steel plate is fixed on the other side of the bamboo-wood bracing beam by the threaded cooperation of the nut and the threaded rod, and the corrugated steel plate, the bamboo-wood bracing beam, the waist block and the shear steel sheet are tightly fixed together, thus solving the problem that the low durability of the existingbox girder caused by the insufficient prestress of the frame structure.

Description

technical field [0001] The invention belongs to the technical field of box girders, in particular to a bamboo wood and steel composite box girder based on bolt connection. Background technique [0002] Box girder is a kind of beam in bridge engineering. It is hollow inside and has flanges on both sides of the upper part. It is similar to a box, so it is named. It is divided into single box and multi-box. The reinforced concrete box girder is divided into prefabricated box girder and Cast-in-place box girders, prefabricated box girders combined with bridge erecting machines at independent sites can be erected after the completion of the lower part of the project, which can speed up the progress of the project and save the construction period. Cast-in-place box girders are mostly used for large continuous bridges. [0003] The traditional box girder is made of concrete. In order to ensure the service life of the box girder, the inside of the box girder is prestressed with stee...

AI Technical Summary

Problems solved by technology

[0003] The traditional box girder is made of concrete. In order to ensure the service life of the box girder, the inside of the box girder is prestressed with steel bars. However, the weight is relatively large, the amount of work is large, and the excessive consumption of manpower and material resources reduces the installation efficiency and the cost is relatively high. At the same time, the box girder structure is relatively hard and the prestress is insufficient, which will lead to web cracking and insufficient structural durability.

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