Corrugated steel ventral shield preflex composite beam and construction method thereof

Abstract

The invention relates to a bridge composite beam structure, in particular to a corrugated steel ventral shield preflex composite beam and a construction method thereof. The corrugated steel ventral shield preflex composite beam consists of an I-shaped girder provided with a corrugated steel ventral shield, and reinforced concrete boards coated outside the margin plates of the upper and the lower wings of the I-shaped girder. The corrugated steel ventral shield preflex composite beam can be applied to urban interchange engineering and high-speed railway bridge engineering. As the rigidity of the longitudinal bridge direction of the corrugated steel ventral shield is very small, which can not absorb preflex force when preflexing the girder, the loss of prestress of the structure under shrinkage and creep effects can be reduced; the excellent shear resistance bearing capacity of the corrugated steel ventral shield avoids cracks of the ventral shield, and the durableness of the structure is good; moreover, the invention also provides the construction method of the corrugated steel ventral shield preflex composite beam.

Description

technical field [0001] The invention relates to a bridge composite beam structure, in particular to a corrugated steel web pre-bent composite beam and a construction method thereof. Background technique [0002] Pre-bent composite beam is a distinctive structure, which is usually used in bridge engineering with small and medium span roads and railway simply supported beam bridges, and can also be used in continuous beam bridges. Compared with common structural forms such as prestressed box girders and prestressed T beams, it uses a large amount of steel, relatively high single-span construction costs, and relatively complicated construction techniques; but at the same time, it also has high rigidity, strong spanning ability, and durability. It has obvious advantages such as good performance and small height-span ratio. Before the 1980s, due to the low steel output in my country, it was difficult for structures with large steel consumption such as pre-bent composite beams to...

AI Technical Summary

Problems solved by technology

Before the 1980s, due to the small amount of steel produced in my country, it was difficult for structures with a large amount of steel such as pre-bent composite beams to be widely used in China.

The reasons can be attributed to the following three points: the cost of single-span pre-bent composite beams is relatively high; the construction process is relatively complicated; there is a lack of corresponding design and construction specifications and standards

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