Prefabricated steel tube bundle partially-prestressed concrete beam and construction method thereof

Abstract

The invention discloses a prefabricated steel tube bundle partially-prestressed concrete beam and a construction method thereof. The beam comprises a hollow lattice type steel tube bundle, concrete, prestressed steel bars, baffles and anchoring steel bars, wherein the baffles are fixed to the two ends of the interior of the hollow lattice type steel tube bundle; a plurality of prestressed bar holes are formed in the lowermost layer of the baffle of a lowermost steel member, and a plurality of preformed holes are formed in other layers; the other baffles are provided with a plurality of layers,wherein a plurality of preformed holes are formed in each layer; the prestressed steel bars are arranged in the prestressed bar holes in a sliding manner and penetrate through the whole beam; the prestressed steel bars are loaded with control stress and anchored; the anchoring steel bars are inserted into the preformed holes and fixed; and concrete is poured between the baffles, and after strength requirements are met, prestress is released, and therefore the steel tube bundle partially-prestressed concrete beam is formed. The beam combines advantages of a steel reinforced concrete structureand a prestressed concrete structure, so that the anti-vibration property and the anti-deformation capacity of the beam are improved, the bearing capacity is high, the later-period bearing capacity isstable, and the structural rigidity is greatly improved.

Description

technical field

[0001] The invention relates to the technical field of construction engineering, in particular to a prefabricated steel pipe bundle partially prestressed concrete beam and a construction method thereof. Background technique

[0002] The existing steel tube bundled concrete composite structure is currently mainly used in the shear wall structure system. This structure still has many limitations, such as difficulty in opening holes, limited layout of doors and windows, high steel consumption, large processing volume, and large installation workload. , high construction cost, relatively difficult design, unfavorable for earthquake resistance, and unfavorable for the popularization and application of steel pipe bundle composite structures in multi-storey buildings and low seismic intensity areas.

[0003] In order to solve the above defects, the steel tube bundled concrete wall frame structure is adopted, and the pilasters and connecting beams are all made of lat...

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