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Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars

A technology of steel tube concrete columns and prefabricated concrete, which is applied in the direction of architecture and building structure, etc., to achieve the effect of reducing the weakening effect, reducing the transfer of prestressing effect, and has a broad application prospect

Inactive Publication Date: 2014-07-23
BEIJING UNIV OF TECH
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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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  • Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars
  • Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars
  • Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The structure of the composite node structure of the precast concrete beam square and rectangular steel tube concrete column connected with the ordinary steel bar is as follows figure 1 Shown:

[0024] 1. Fabrication of square and rectangular steel tube concrete and reinforced concrete beams

[0025] 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. 6 corresponding holes are reserved during prefabrication. The inner diameter of the holes is 15mm larger than the diameter of the prestressed tendons (3) and is close to the beam. Metal bellows (7) are pre-embedded in the channels of the upper and lower sections, and steel plates (5) and channel steel (6) are welded by welding at the connecting beams on the square rectangular steel tube concrete column (1).

[0026] 2. Assembly of beam-column nodes

[0027] After the square rectangular steel tube concrete co...

Embodiment 2

[0035] 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 steel plate (5) can be used as the bearing plate for the tension of the prestressed steel bar (3), and at the same time, the ordinary steel bar (4) can also be welded here. The steel plate is used to meet the anchoring requirements of the back through steel bars.

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Abstract

The invention discloses a combination joint of a prefabricated concrete beam and a rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars, and belongs to the technical field of building structures. The combination joint comprises the rectangular concrete filled steel tubular column, the reinforced concrete beam, the pre-stressed steel bars, steel plates and channel steel. The rectangular concrete filled steel tubular column and the reinforced concrete beam are both prefabricated; a hole channel is reserved in the cross section, corresponding to the rectangular concrete filled steel tubular column, of the prefabricated concrete beam, and a metal corrugated pipe is pre-buried in the hole channel; the steel plates are welded to the cross section, connected with the reinforced concrete beam, of the rectangular concrete filled steel tubular column; the channel steel is welded onto a rectangular steel pipe, the common steel bars, the pre-stressed steel bars and tension pre-stressed steel bars penetrate through the metal corrugated pipe backwards; after tension is completed, hole channel grouting is completed within forty right hours, and therefore the beam and the column form a whole. The combination joint is high in construction speed, the anti-shear bearing capacity of the joint can be effectively increased, the connecting performance of the joint is enhanced and the application prospects are wide.

Description

Technical field [0001] The invention relates to a composite node of a square and rectangular steel tube concrete column connected by a prestressed concrete beam and a common steel bar, and belongs to the technical field of building structures. Background technique [0002] The application of concrete-filled steel tube in construction projects has a history of 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 effects and convenient construction. Concrete-filled steel tubes can adapt to the needs of modern engineering structures for large-span, high-rise, heavy-load development and withstand harsh conditions, and meet the industrial requirements of modern construction technology. Therefore, it is being more and more widely used in single-story and multi-story industrial plant columns, Good economic and architectural effects have been achieved in equipment frame col...

Claims

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Application Information

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IPC IPC(8): E04B1/58
Inventor 李振宝王倩倩解咏平宋坤马华
Owner BEIJING UNIV OF TECH
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