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Unbonded prestress and ordinary steel bars connecting precast concrete beams with square and rectangular concrete-filled steel tube column composite joints

A technology of prefabricated concrete and ordinary steel bars, which is applied in the direction of construction and building structure, and achieves the effect of broad application prospects, guaranteed reliability and huge economic benefits.

Active Publication Date: 2016-08-17
宝嘉智能科技(南通)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many forms of existing CFST joints, and the difficulties in construction and design of joints often become the bottleneck factor restricting the popularization and application of new and excellent structures

Method used

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  • Unbonded prestress and ordinary steel bars connecting precast concrete beams with square and rectangular concrete-filled steel tube column composite joints
  • Unbonded prestress and ordinary steel bars connecting precast concrete beams with square and rectangular concrete-filled steel tube column composite joints
  • Unbonded prestress and ordinary steel bars connecting precast concrete beams with square and rectangular concrete-filled steel tube column composite joints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The composite joint structure of precast concrete beams with circular steel tube concrete columns connected by unbonded prestress and ordinary steel bars is as follows: figure 1 Shown:

[0025] 1. Manufacture of square and rectangular steel pipe concrete and reinforced concrete beams

[0026] Square rectangular concrete-filled steel tube columns (1) and reinforced concrete beams (2) are produced in the factory in strict accordance with relevant specifications and drawings, and 6 corresponding channels are reserved during prefabrication, and the inner diameter of the channels is 10mm larger than that of the unbonded prestressed tendons (3) , the metal bellows (7) is pre-embedded in the tunnel near the upper and lower sections of the beam, and the ring plate (5) and channel steel (6) are welded by surrounding welding at the connecting beam on the square rectangular concrete filled steel tube column (1).

[0027] 2. Assembly of beam-column joints

[0028] After the squar...

Embodiment 2

[0036] See when it is a side column node figure 2 , other measures are the same as in embodiment 1, except that at the end of the side column, the ring plate (5) can be used as a pressure plate for the unbonded prestressed steel bar (3) when it is stretched, and it can also be used to pass through the common steel bar (4) ) to be welded on this ring plate to meet the anchoring requirements of the post-piercing steel bars.

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Abstract

The invention relates to a precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection and belongs to the technical field of building structures. The precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection comprises a square-rectangular concrete-filled steel tube column, a reinforced concrete beam, prestressed bars, steel plates, and steel channels. Both the square-rectangular concrete-filled steel tube column and the reinforced concrete beam are precast. The parts, corresponding to the beam section, of the square-rectangular concrete-filled steel tube column and the precast reinforced concrete beam are provided with ducts in which metal bellows are embedded. The steel plates are welded at the connection sections of the square-rectangular concrete-filled steel tube column and the reinforced concrete beam. The steel channels are welded on the square-rectangular concrete-filled steel tube column. Ordinary rebars and unbonded prestressed rebars are passed through the metal bellows, and the prestressed rebars are tensioned so that the beam and the column are integrated. The precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection has the advantages that construction speed is high, the field welding process is not required, joint connection reliability is guaranteed, seismic performance is good, and the joint has promising application prospect.

Description

technical field [0001] The invention relates to a combined joint of prefabricated concrete beam square rectangular steel pipe concrete columns connected by unbonded prestress and ordinary steel bars, and belongs to the technical field of building structures. Background technique [0002] Concrete filled steel tubes have been used in construction projects for more than 100 years. Concrete filled steel tubes are valued by engineering circles because of their high bearing capacity, good plasticity and toughness, good economic effect and convenient construction. Concrete-filled steel tubes can adapt to the needs of modern engineering structures to develop toward large spans, high towers, heavy loads and withstand harsh conditions, and meet the industrial requirements of modern construction technology. Therefore, they are being more and more widely used in single-story and multi-story industrial factory buildings Good economic and architectural effects have been achieved in equi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/58E04B1/41
Inventor 李振宝王文静宋坤解咏平马华
Owner 宝嘉智能科技(南通)有限公司
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