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

A technology of concrete beams and construction methods, which is applied in the direction of structural elements, building components, building reinforcements, etc., can solve the problems of unfavorable steel pipe bundle composite structure promotion and application, restricted door and window layout, and large installation workload, etc., to achieve reliability and safety, reducing beam deflection, and shortening the construction period

Pending Publication Date: 2020-05-15
HEBEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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, difficult design, unfavorable for earthquake resistance, unfavorable for the popularization and application of steel pipe bundle composite structures in multi-storey buildings and low seismic intensity areas

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The hollow lattice steel pipe bundle 1 is welded by 2 steel members to form a straight structure; the baffle plate 5 is symmetrically welded and fixed at both ends of the innermost steel member of the bottom layer, and the other steel member is not provided with the baffle plate 5 ,Such as Figure 1-2 shown;

[0054] Construction method:

[0055] Step 1. Two baffles 5 are symmetrically welded and fixed on both ends of a steel member; the bottom layer of the baffle 5 is provided with 2 prestressed tendon holes 7, and the second layer is provided with 2 reserved holes 6;

[0056] Step 2, insert the prestressed reinforcement 3 in the prestressed reinforcement hole 7 of the baffle plate 5 and run through the whole beam, the prestressed reinforcement 3 and the prestressed reinforcement hole 7 are in clearance fit, and the prestressed reinforcement 3 can be free in the prestressed reinforcement hole 7 Expansion and expansion; After stretching the prestressed steel bar 3 to...

Embodiment 2

[0060] The hollow lattice steel pipe bundle 1 is welded by 2 steel members to form a straight structure; the baffle plate 5 is symmetrically welded and fixed on both ends of each steel member of the hollow lattice steel pipe bundle 1, and each steel A baffle plate 5 is welded at both ends of the component, such as Figure 3-4 shown;

[0061] Step 1. Weld 2 steel components into a straight hollow lattice steel pipe bundle 1;

[0062] Step 2, welding and fixing four baffles 5 on the two ends of the two-layer steel members of the hollow lattice steel pipe bundle 1; Stress tendon holes 7, the second layer is provided with 2 reserved holes 6; the baffle plate 5 inside a steel member of the second layer is provided with 2 layers, and each layer has 2 reserved holes 6;

[0063] Step 3, insert the prestressed reinforcement 3 in the prestressed reinforcement hole 7 of the baffle plate 5 and run through the whole beam, the prestressed reinforcement 3 and the prestressed reinforcement ...

Embodiment 3

[0066] The hollow lattice steel pipe bundle 1 is welded by 2 steel members to form a straight structure; the baffle plate 5 is symmetrically welded and fixed to the two ends of each steel member of the hollow lattice steel pipe bundle 1, and is adopted in the hollow lattice After all the middle steel plates of the structural steel pipe bundle 1 are provided with through grooves, a baffle plate 5 is welded to each of the two ends of all the steel members inside the hollow lattice steel pipe bundle 1, such as Figure 5 shown;

[0067] Step 1. Weld 2 steel components into a straight hollow lattice steel pipe bundle 1;

[0068] Step 2. After inserting the two baffles 5 into the through grooves on all the middle steel plates respectively, weld and fix the two ends inside the two-layer steel members of the hollow lattice steel pipe bundle 1; The bottom layer of the baffle plate 5 is provided with 2 prestressed tendon holes 7, and the second layer is provided with 2 reserved holes 6...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/293E04C5/08
CPCE04C3/293E04C5/08
Inventor 张玉芬马国伟曹胜昔黄丽红赵旭旺
Owner HEBEI UNIV OF TECH
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